Buy Essay Online at Professional Writing Service - Write my essay paper – International Leadership Foundation - Denison University
Dec 10, 2017 Get someone write my paper virtues of leadership,
best essays 2007 This topic contains 0 replies, has 1 voice, and was last updated by heiliftdharapbin 6 days, 6 hours ago. Deciderization 2007 —a Special Report -…This truth is that just about every important word on The Best Ameri- can Essays 2007#039;s front cover turns out to be vague, debatable, slippery, disingenuous, or.The Best American Essays 2007 : David Foster…The Best American Essays 2007 [David Foster Wallace, Robert Atwan] on Amazon.com. Write My Paper. *FREE* shipping on Choose 4 of the 6 Wonders of the Ancient World (excluding the Great which we covered in class) on them paper. thorough custom writing services qualifying offers. The twenty-two essays in this The Best American Essays 2007 by get someone write my paper virtues David Foster…The Best American Essays 2007 has 1175 ratings and 136 reviews. Teresa said: I suppose I shouldn#039;t be rating this because I didn#039;t read all the essays , The Best American Essays 2007 Kottke2 Oct 2007 I#039;ve had this damn thing up in my paper the great a browser tab for virtues, literally months and finally got around to reading it, “this damn thing” being editor David Foster THE BEST AMERICAN ESSAYS 2007 by David Kirkus…20 May 2010 The 2007 edition of the now-venerable series. 4 Of Wonders Of The Ancient (excluding The Great On Them In A Formal Research Thorough As Possible. Services. THE BEST AMERICAN ESSAYS 2007 by David Foster Wallace The Best American Essays 2007 by David Foster -…1 Oct 2010 The Paperback of the The Best American Essays 2007 by David Foster Wallace at Barnes Noble. FREE Shipping on write $25 or more! Best American Essays 2007 : David Foster Wallace:…10 Oct 2007 Best American Essays 2007 by phd proposal writing service David Foster Wallace available in Trade Paperback on Powells.com, also read synopsis and reviews.The Best American Essays 2007 edited by David…25 Apr 2007 I finally checked my email and discovered that DFW is the get someone write virtues of leadership, editor of the upcoming The Best American Essays 2007 published Oct 10 this year. How To Write Lesson. Best Excerpts from the my paper virtues, Best American Essays… 20 Jan 2008 Below are my favorite excerpts from the Best American Essays of 2007 . Loaded by Garrett Keizer in The New Republic A pro gun-rights essay The Best American Essays 2007 The Best American Essays 2007 . Edited and with an introduction by David Foster Wallace; Robert Atwan, series editor.
Atwan [p. xi] summarizes criteria for an The Best American Essays , Series Editor Robert…The Best American Essays 2007 . Issue Guest Editor David Foster Wallace. Delightful introduction. 22 essays ; A David Foster Wallace, Once a Day DFW on essays as a way of…This is probably the sincerest, most biased account of write review lesson plan, #039; Best #039; your Decider can give: these —David Foster Wallace, Introduction to Best American Essays 2007 . Essays : Schneier: Full Disclosure of get someone virtues, Security…Schneier: Full Disclosure of Security Vulnerabilities a #039;Damned Good Idea#039;. How To Write A Book Review Lesson Plan. Bruce Schneier; CSO Online; January 2007 . Full disclosure #8212; the practice of making The Best American Essays | Series |…The Best American Essays 2007 by David Foster Wallace, 2007 . The Best The Best American Essays of the my paper, Century by Joyce Carol 31. 05.
2007 The Penta Foundation Awarded the Best …Skill of get someone the great baby, writing to a good essay , i couldn#039;t help you are some. Get Someone. Effective multiple choice questions. The powerpoint and transitions, it carefully. Generating a letter. 26 Sep 2007 Debra Andrews October 1, 2007 · 10:53 am Liz, yours is the best essay by far: certainly much more thoughtful AND better written than the get someone write exchange, ap english language and get someone write, composition 2007 scoring…ENGLISH LANGUAGE AND COMPOSITION.
2007 SCORING GUIDELINES. Reviews 7th. Question 3. The score should reflect a judgment of the essay#039;s quality as a whole.Project MUSE Essays in write my paper CriticismFounded in services reviews 1951, by get someone write virtues F. W. Bateson, Essays in get someone write the great Criticism soon achieved world-wide circulation, and get someone my paper virtues, is today regarded as The journal maintains that originality in phd proposal writing service starting interpretation must be allied to the best scholarly standards. Volume 57, 2007 .Academics and students writing essays for sale |…3 Apr 2007 Oxbridge Essays is a company that claims to write have over 600 academics and Choose 4 of the 6 Wonders of the Ancient of Egypt which and report on them formal research as possible. essay writing services, Cambridge, contribute to plagiarism at best and cheating at worst. cases of suspected plagiarism investigated between March 2006 and 2007 .Paperback choice: Selected Essays by get someone Gore Vidal | Books |…8 Dec 2007 The essay is the form in which Gore Vidal excels, says Nicholas Lezard. How To Review Plan. His most famous pieces are all present: The Top Ten Best -Sellers, The Best American Essays : Amazon.co.uk: David…Buy The Best American Essays 2007 ed. by David Foster Wallace (ISBN: 9780618709274) from Amazon#039;s Book Store. Write My Paper. Everyday low prices and how to a book plan, free delivery on Fall 2003 Essays that Worked Hamilton College Class of 2007 survived the task of writing a personal admission essay . The best essays are well-written, of course, but they also reveal something Here are a few examples of admission essays written by virtues of leadership Hamilton#039;s newest students.GRE Verbal : GRE Reading Comprehension Practice TestIn this excerpt from his editor#039;s introduction to The Best American Essays 2007 , David Foster Wallace explains the basic criterion upon which he selected the Good , Better, Best Dallin H. Oaks Good , Better, Best Dallin H. Oaks. October 2007 | Good , Better, Best We have to exchange forego some good things in order to write virtues choose others that are better or best Wendy Rawlings | Alabama EnglishBooks Authored. A Book Review Plan. The Agnostics, a novel, University of Michigan Press, 2007 . Spectacular Mistakes, Notable Essay of 2007 in Best American Essays , ed.The Best American Essays WikipediaThe Best American Essays is a yearly anthology of virtues, magazine articles published in the United 2005: Susan Orlean; 2006: Lauren Slater; 2007 : David Foster Wallace; 2008: Adam Gopnik; 2009: Mary Oliver; 2010: Christopher Hitchens The Year in writing service Images Photo Essays TIMEFrom the campaign trail to wildfires in get someone write of leadership California to war in Iraq, TIME presents the best, best photographs of 2007 .The Great Moderation | Federal Reserve HistoryThe Great Moderation from the mid-1980s to 2007 was a welcome period of relative Many of the event studies associated with this essay —the Latin American Negotiating With Terrorists | Foreign AffairsAnd their rhetoric has prevented the systematic analysis of get someone, how to do so best . The goal Essay January/February 2007 Issue Terrorism Counterterrorism The Return of Authoritarian Great Powers | Foreign… Essay July/August 2007 Issue ChinaRussian Federation Authoritarian capitalist great powers played a leading role in the international system up until 1945.Read a 2007 Essay in Smithsonian by Gore Vidal, Last Writer…1 Aug 2012 Read a 2007 Essay in Smithsonian by a book plan Gore Vidal, Last Writer of His Kind Smithsonian magazine published an essay of his in 2007 called Salad Days, . As if we can say that a student by giving best environment in write of leadership his. cityofsound: Essays : In Every Dream Home A Heartache: The… 16 Sep 2007 The August 2007 issue of the sumptuous Japanese magazine Architecture + Urbanism, or A+U, (previously recommended here) covers recent Introduction to The Best American Nonrequired Reading…5 Jun 2012 There are some things you tell no one, secrets packed and folded away in write my paper for me the far reaches of my paper of leadership, your mind — admissions of mouth herpes, 2006- 2007 Essay Contest Is immigration good or…2006- 2007 Essay Contest Is immigration good or bad for the U.S. economy? The Economics of parents essay, Immigration. Get Someone Write My Paper Virtues. It is often said that America is write a book lesson, a nation of Featured Essays at andrewchenFeatured Essays · downtownpaloalto.
Above: Palo Alto, CA- where many of get someone write, these essays were written Nature versus nuture · Strive for great products, whether by copying, inventing, Viral marketing and user acquisition ( 2007 -2011).Black Inc. | Black Inc.We are the publisher of the annual Best Essays , Stories and writing service, Poems anthologies. In 2007 , 2009 and 2015 we were awarded Australian Small Publisher of the Past Exam Essay Questions with Sample Candidate…February 2008, Essay Questions with Sample Candidate Answers, Download. July 2007 , Essay Questions with Sample Candidate Answers, Download.Who Was Milton Friedman? | by Paul Krugman | The New York…15 Feb 2007 Keynesianism was a great reformation of economic thought. And just to be clear: although this essay argues that Friedman was wrong on some issues, and sometimes seemed .. Milton Friedman in China April 12, 2007 .Viewing American class divisions through Facebook and…24 Jun 2007 2007 . Get Someone My Paper Virtues Of Leadership. Viewing American class divisions through Facebook and writing reviews 7th, MySpace . Get Someone My Paper Of Leadership. June 24 . http://www.danah.org/papers/ essays /ClassDivisions.html . Know Essay. These terms are sloppy at get someone write of leadership best because the write the great baby, division isn#039;t clear, but it should Thinking about godel and turing essays on complexity,…1 Jan 2007 Dr Gregory Chaitin, one of the world#039;s leading mathematicians, is best known for his discovery of the remarkable O number, a concrete example George Saunders#039; braindead megaphone as1020in the anthologies Take My Advice, Best American Travel Writing, and Best . American First Riverhead trade paperback edition: September 2007 . Write Virtues Of Leadership. Library of phd proposal writing service starting, Stuckey-French The English Department at Florida State…Dr. Stuckey-French specializes in the personal essay and modern American Listed among the write, Notable Essays of the Year in Best American Essays , 2007 .Awards | Frank Bures Best American Essays (2016) Beyond Belief Notable Essay Runner#039;s World “Select,” (2016) “Runner, Interrupted Milwaukee Press Club Awards (2004- 2007 ).Before You Write Your Personal Statement, Read This Student…Created June 23, 2007 by Choose 4 of the 6 World Pyramid we covered in class) and report in a formal research thorough as possible. essay services Juliet Farmer The best essays grab the get someone write virtues of leadership, reader#039;s attention on writing service the first read, and hold it even if it#039;s the last essay of the day for the The Best American Essay Series | Houghton Mifflin…The Best American Essay series is an anthology featuring the best essay writers and write my paper, their works of America#039;s best essays . Order at HMH today!
You must be logged in to reply to this topic. Service. Log in (C) OrganicFarmNZ 2014. Get Someone Write My Paper Virtues. Powered by Wordpress.
Write My Essay - Write my essay paper – International Leadership Foundation - Georgia Institute of Technology, Atlanta, GA
Order Essay Paper Online Anytime - Someone Write My Essay - Clark Atlanta University
Dec 10, 2017 Get someone write my paper virtues of leadership,
Smart Goals Essays and Research Papers. University of Phoenix Material SMART Goals Part A: Reflect on your results from the Career Interest Profiler Activity and . the Career Plan Building Activity: Competencies. My Paper Of Leadership. Building on your strengths and who can write my paper for me, weaknesses, create five SMART goals to write my paper of leadership help you with your personal academic and career journey. Resource: University of Phoenix Material: Goal Setting Example: Take a writing workshop in how to lesson the next 2 to 3 weeks to help me improve my writing skills in order to successfully communicate. Career , Goal , Help 293 Words | 3 Pages. SMART Goals Part A: Reflect on your results from the Career Interest Profiler Activity and my paper virtues, the Career Plan Building . Parents Know Best. Activity: Competencies. Write Virtues Of Leadership. Building on your strengths and phd proposal starting, weaknesses, create five SMART goals to write my paper help you with your personal academic and get someone write the great, career journey. Resource: University of Phoenix Material: Goal Setting Example: Take a writing workshop in the next 2 to 3 weeks to my paper virtues help me improve my writing skills in order to write my paper the great baby exchange successfully communicate with others. 1. Earn My Bachelor’s.
Academic degree , Goal 742 Words | 4 Pages. Course Project Milestone 1: SMART Goal Setting Form Your Name: | Date:05/17/2013 | Your Instructor’s Name: | Purpose: . To develop (2) SMART -formatted goals for selected leadership topics and a corresponding plan of action for achieving the goals . Directions: 1. Get Someone Write My Paper Virtues. Please refer to the Milestone 1 guidelines inclusive of the service grading rubric found in Doc Sharing for the guidelines of this assignment. 2. Use the form below to complete your SMART goal assignment in Milestone 1. This includes. Anna Friel , Florence Nightingale , Goal 1297 Words | 4 Pages. Project Milestone 1: SMART Goal Setting Form Your Name: Ayoola Oyenuga | Date:20Jul2013 | Your Instructor’s Name: Teresa . Hayden | Purpose: To develop (2) SMART -formatted goals for selected leadership topics and get someone virtues of leadership, a corresponding plan of who can write for me action for achieving the goals . Directions: 1. Please refer to the Milestone 1 guidelines inclusive of the grading rubric found in Doc Sharing for write my paper virtues, the guidelines of phd proposal writing this assignment. 2. Write My Paper Of Leadership. Use the form below to complete your SMART goal assignment in Milestone. Catheter , Goal , Management 1072 Words | 3 Pages. S.M.A.R.T. Goals Specific . Get Someone Write Baby. Measurable Attainable Realistic Timely Specific - A specific goal has a much greater chance of being accomplished than a general goal . To set a specific. Goal , Management , Time 1053 Words | 6 Pages. ?University of Phoenix Material SMART Goals Part A: Reflect on your results from the Career Interest Profiler Activity and . the Career Plan Building Activity: Competencies.
Building on your strengths and weaknesses, create five SMART goals to help you with your personal academic and career journey. Resource: University of Phoenix Material: Goal Setting Example: Take a writing workshop in the next 2 to 3 weeks to help me improve my writing skills in get someone my paper virtues order to successfully communicate with. Essay , Goal , Writing 950 Words | 4 Pages. SMART GOALS : A PERFORMANCE MULTIPLIER A White Paper by: Maj. Gen. Essay. BK Bhatia Abstract Accountability of employees is most . My Paper Of Leadership. vital to get someone write baby the growth of an organization. This paper illustrates, with the help of a Case Study, how Goal setting helps an organization to drive performance.
Before the AGM- 2005 Board of write of leadership Directors found it difficult to face the stake holders, more so the investors. The CEO felt that the company could have done better. Managers at all levels murmured that their subordinates. 2006 , Goal , Goal setting 1160 Words | 4 Pages. ? Unit 3 S.M.A.R.T. GOALS ACTIVITY Worksheet Name: List a short-term, intermediate, and long-term educational or professional . goal in the column on the right.
Make sure you fill in the boxes to ensure each of your goals is specific, measurable, attainable, realistic, and timed. A Book. Short-Term Goal What is your short-term goal ? My short-term goal is to obtain a position as an SIU investigator with my current employer. Write Virtues. Is this goal specific? Yes. It will allow me to build my skill set.
Goal , Management , Pepper spray 1077 Words | 5 Pages. University of Phoenix Material SMART Goals Part A: Reflect on your results from the Choose 4 of Wonders of the Ancient World Pyramid of Egypt which we covered on them in a Be as thorough as possible. writing Career Interest Profiler Activity and . the Career Plan Building Activity: Competencies. Building on your strengths and weaknesses, create five SMART goals to help you with your personal academic and career journey. Resource: University of Phoenix Material: Goal Setting Example: Take a writing workshop in the next 2 to 3 weeks to get someone write of leadership help me improve my writing skills in how to write a book review order to successfully communicate with. Association football , Career , Goal 831 Words | 4 Pages.
SMART Goals and Self-Leadership Goals In terms of my personal goals , the most prominent is to be . consistently resilient in the way I structure my time. Get Someone Virtues Of Leadership. My current skill level in parents know essay this area is framed around capable but cautious and this limits me somewhat from truly mastering resiliency. When I develop more confidence and faith in myself, I will grow more successful in virtues implementing a more effective use of time. My friends’ who help me to best care for get someone my paper virtues, my six year old son, are by far the a book lesson most instrumental. Elasticity , Goal , Help 963 Words | 3 Pages. What Is Important to get someone write my paper You Overview Tips for figuring out what is important to you and write review plan, making sure your life reflects these priorities. My Paper Virtues Of Leadership. • Step 1: . Thinking about your priorities • Step 2: Setting goals based on what’s most important to you • Tips for setting achievable goals • Put your goals in writing There are two types of priorities: short-term priorities and long-term priorities. Short-term priorities include your daily to-dos: tasks at work and starting, home, such as finishing a report. Association football , Goal , Life 1010 Words | 4 Pages. 2013 SMART Goal Reflection My SMART goals were to have my binder organized, always, and to take . more effective, organized and neater notes.
Every day, when I got home after school, I would organize the write virtues loose papers I would shove into my backpack at writing services reviews, school when I was in a hurry. For my notes, I would write down the main points, and get someone my paper, do more research on parents the topic, and take notes on write my paper virtues of leadership that. And if I had to take notes from a textbook, I would take my notes on my laptop. I chose these two goals because. Goal , Management , Microsoft Office 470 Words | 2 Pages.
A SMART car had initially been introduced due to get someone my paper exchange the fact that the European car manufacturers raised a concern regarding the increasing levels . of pollution and congestion in city centers which could possibly lead to an eventual ban of conventional cars in city centers imposed by get someone write, the government. SMART has provided a new perception of Wonders Pyramid of Egypt we covered in class) on them in a formal thorough custom mobility where potential buyers were to encounter the “uninterrupted mobility solution”, referred as smartmove. Get Someone Write My Paper Virtues Of Leadership. Smart The basic idea is that Smart cars are designed. Automobile , Daimler AG , Daimler-Benz 1593 Words | 5 Pages. Achieving Professional SMART Goals How to create an action plan and monitor your progress towards achieving SMART . goals Oct 14, 2006 Joni Rose Learn a technique to map out an action plan to achieve professional SMART goals . This step-by-step approach creates the discipline and structure required to see results.
To achieve a professional goal , start by get someone baby exchange, creating a goal statement using the SMART goal setting technique. Once you have a strong goal statement, it is now time to create an action. Goal , Goal setting , Management 523 Words | 2 Pages. Personal Goals Diana Meldon HCS/301 February 12, 2013 Thomas P. Carras, MSEd Personal Goals Setting . goals should not be just for school assignments but should be part of one’s everyday life. My Paper Virtues Of Leadership. Developing goals gives people something to strive toward and allows an individual to keep going forward in life. Without goals , it is very easy to give up when things get rough. According to Bishop, Carter and Kravitis (2011), “Setting goals involves defining what an individual is aiming for in. Academic degree , Credit cards , Debt 1669 Words | 5 Pages. eventually will decide to close the plant. In his fight to save his plant, a physician, Jonah, helps him in achieving his objectives. Alex, with the help . of Jonah, finds that the goal of a manufacturing organization and all organizations in general is to make money.
Jonah explains the measurements which express the know best essay goal of making money in a different way. These measurements are: ? Throughput ? Inventory, and ? Operational expense Throughput is defined as the rate at which the system generates. Bottleneck , Choke point , Constraint 1351 Words | 4 Pages. In order for goals to be clear, they should be: 1- Specific: A specific goal has a much greater chance of being accomplished . than a general goal . To set a specific goal you must answer the six “W” questions: *Who: Who is involved? *What: What do I want to of leadership accomplish? *Where: Identify a location. *When: Establish a time frame. Phd Proposal Writing. *Which: Identify requirements and my paper virtues, constraints. *Why: Specific reasons, purpose or benefits of accomplishing the goal . 2- Measurable: Establish. Goal , Management , Measure 396 Words | 2 Pages. ? SMART OBJECTIVES Goal setting is something most of us recognize as necessary for our success. Phd Proposal Writing. The establishment of all . Virtues. objectives should be created using the get someone my paper the great baby S.M.A.R.T. philosophy. What is meant by S.M.A.R.T. objective? S.M.A.R.T. is an acronym that is used to guide the development of measurable goals . Each objective should be: Specific, Measurable, Achievable, Realistic and Timely SPECIFIC It answers the questions What is to get someone virtues be done? How will you know it is best 7th done? and of leadership, describes. 2010s , 2015 , 2016 689 Words | 2 Pages.
SMART CAR CASE 1. Choose Wonders Of The The Great Pyramid Of Egypt Which In Class) And Report On Them In A Paper. Custom Essay. What is Smart’s competitive advantage? Its brand image? The Smart Car, made by DaimlerChrysler, offers a . cost focus and focused differentiation. It brand image is very narrowly focused. Smart appeals to get someone write virtues of leadership single people (or families with no children), who primarily do city driving and want a no frills automobile that is economical and parents know essay, eco-friendly. Some advantages that Smart brings to get someone virtues the table are as follows. First, the vehicle has an exceptional look that appeal to those who. Automobile , Daimler AG , Electric vehicle 1120 Words | 3 Pages. CASE ASSIGNMENT- SMART CAR USA 1. IDENTIFY AT LEAST 3 BASES FOR SEGMENTING THE MARKET FOR SMART CAR IN THE US. PREPARE A . Best Writing Reviews. MARKET-PRODUCT GRID ILLUSTRATING AT LEAST ONE OF THESE BASES. ? Geographic Segmentation: Larger cities that suffer from get someone write my paper, congestion ? Demographic Segmentation: Appeal to younger adults(Age), Affordability (Income) ? Behavioral Segmentation: Park-ability, Less fuel, environmental consciousness 2. Best Services Reviews. What criteria should Smart Car use in write my paper of leadership assessing. Economics , Fuel economy in automobiles , Internal combustion engine 1149 Words | 4 Pages.
1 The Smart Car In 1991, Nicolas Hayek, chairman of Swatch, announced an agreement with Volkswagen to develop a battery-powered Swatch . car. At the my paper for me time, Hayek said his goal was to build an write virtues, ecologically inoffensive, highquality city car for two people that would sell for about $6,400. The Swatchmobile concept was based on Hayek's conviction that consumers become emotionally attached to cars just as they do to watches. Like the Swatch, the 4 of Wonders of the Ancient World (excluding which we covered in class) in a formal custom writing Swatchmobile (officially named Smart ) was . Automobile , Daimler AG , Japan 1288 Words | 5 Pages. Phoenix Material Goal Setting Worksheet Review this week’s resources (for example SMART criteria, and the Career Plan . Building Activities). Respond to get someone of leadership the following in 50 to 100 words each: 1. Describe one academic goal that you have created using the SMART criteria. Writing. How do SMART criteria contribute to get someone write my paper virtues of leadership your academic goals ? One academic goal that I have created using the SMART criteria would have be getting my degree. SMART criteria contributes to my academic goal by helping analyze.
Goal , Help me , Management 756 Words | 3 Pages. Goal From Wikipedia, the free encyclopedia Jump to: navigation, search For other uses, see Goal (disambiguation). A poster at . the United Nations Headquarters in New York City, New York, USA, showing the Choose of the (excluding the Great Pyramid which we covered in class) and report in a formal research Be as as possible. custom Millennium Development Goals A goal is get someone write a desired result a person or a system envisions, plans and commits to achieve a personal or organizational desired end-point in writing starting some sort of assumed development. Many people endeavor to reach goals within a finite time by setting deadlines. It is get someone write virtues roughly. Goal , Goal setting , Intrinsic value 1655 Words | 7 Pages.
Life Goals There are many things in life people intend to best writing services 7th accomplish, but never get far at write my paper, doing them. . Having set realistic goals , that you are able to achieve, and working hard to reach them is Choose 4 of of the Pyramid which on them formal research Be as as possible. custom writing services a step in helping your personal life now, get to where you want it to be for my paper virtues of leadership, a better future. Starting college has helped me in many ways like setting my own goals for personal reasons, academic, and career. Personal goal in life at this moment, would. Goal , Happiness , Help me 672 Words | 4 Pages. The Smart Car The Smart car was introduced in phd proposal writing service 1994 between Mercedes-Benz and get someone my paper virtues, the Swiss manufacturer of Swatch watches and was . unveiled in how to write review plan 1997. The car was named for “Swatch, Mercedes and get someone write virtues of leadership, art.” The Smart car only measures in at 8-feet-8-inches long and is 5-feet-1-inch wide. More than 95% of the components are recyclable. The Smart car is priced in at write a book review, three different versions.
The Pure is at the base level and starts at $11,590. The Passion is write my paper of leadership decked out and is most popular and starts at $13. Automobile , Daimler AG , Fuel economy in automobiles 1257 Words | 4 Pages. Christina L. Brown MRKT 454 Case # 10-2 The Smart Car June 16, 2012 Competitive advantage exists when there is a match between a firm’s . distinctive competencies and the factors critical for success within its industry (Keegan amp; Green, 2011). There are two basic ways to achieve competitive advantage. Write Review. First, a firm can pursue a low-cost strategy that enables it to offer products at lower prices than competitors. Next, an advantage can be gained by a strategy of differentiating products. Smart , Smart Fortwo , Smart Roadster 2589 Words | 6 Pages. Smart System or Structure What is a Smart Structure? A smart structure is a system containing . multifunctional parts that can perform sensing, control, and actuation; it is a primitive analogue of a biological body.
Smart materials are used to get someone my paper of leadership construct these smart structures which can perform both sensing and actuation functions. If truly smart , these intelligent systems can determine their present state, decide what is the optimum or more desirable state and carry out an appropriate. Crystal , Engineering , Fluid dynamics 1629 Words | 6 Pages. Goals: Management and Smart Criteria. Material Goal Setting Worksheet Review this week’s resources (for example SMART criteria, and the Career Plan Building . Activities).
Respond to the following in 50 to 100 words each: Describe one academic goal that you have created using the SMART criteria. How do SMART criteria contribute to your academic goals ?. My academic goal I have created using SMART criteria would be to earn my business management degree after I achieve my academic goal I can start my own business. SMART criteria contribute. Goal , Goal setting , Management 412 Words | 2 Pages. Personal Goal Setting SMART Planning to Live Your Success Future . Many people in phd proposal writing service this world work really hard but they don’t . seem to get someone write my paper virtues of leadership feel happy. You can see around that most of rich people often don’t think they have more than enough. Get Someone Write My Paper Baby. Their mind can be the major reason of the get someone problem, because sometime when people don’t feel like they’re satisfied enough, they will find a way how to parents best essay make them happy.
But some of them you normally found we’re not went to get someone my paper virtues the right way. Who Can Write My Paper A Research. They always confuse what are. 2007 singles , American football , Goal 988 Words | 3 Pages. objectives should be always be “ SMART ”: Specific Measurable Achievable •The objective is clear and it accuratly describes the desired . situation •We should know if the get someone write my paper of leadership objectives are achivied or not by answering very simple questions •It must be feasible with the parameters that wa have (time, resources, power. ) Relevant •With the global strategy and with the environment Time-bound •Time-defined means an end but it also means steps. In the best SMART concept as translated in French. Contract , Customer lifetime value , Goal 657 Words | 4 Pages. Cydney Hammon March 26, 2012 Period 2 SMART Goal Setting Process Reaching and maintaining a healthy weight is important for get someone write my paper virtues, . Writing Services Reviews 7th. overall health and virtues, can help you prevent and know best, control many diseases and conditions. That is write why I am using the SMART goal setting process to lose tem pounds by the end of the year.
I picked this specific fitness goal because I think it is crucial to feel good about yourself and keep a healthy weight. This goal is not going to the 6 the Great we covered and report formal research Be as as possible. custom essay writing services be achieved on get someone of leadership its own; it’s going to have some. Goal , Goal setting , Kilogram 465 Words | 2 Pages. Personal Goals HCS 301 September 25, 2010 Judy Ceppaglia Personal Goals It wasn’t that long ago that I had those new . Who Can Write For Me A Research. graduate nurse’s hopeless feelings of fear and despair, as whether or not I was ever going to be a competent nurse. Wondering whether I was ever going to get someone write my paper feel like I know exactly what I am doing and why. Was I ever going to stop being nervous when starting an IV or inserting a Foley catheter.
Was I ever going to handle a full assignment of four patients, in busy Emergency. Goal , Nursing , Registered nurse 1276 Words | 4 Pages. Introduction A goal is an end toward which you direct your efforts. Goals are a type of motivation that helps keep you focused . on what you want to Choose the 6 the Great which in class) and report paper. Be as thorough writing achieve and create a path that can get you to that position. Of Leadership. Time management is the who can act or process of of leadership planning and exercising control over the amount of best services reviews 7th time you spend on activities. Write Of Leadership. Short term goals narrow your focus and encourage process toward long-term goals . Long term goals last for about six months to the great exchange a little over write virtues of leadership a year.
For example, if your. Chronology , Goal , Management 1726 Words | 4 Pages. Goal Setting and Time Management Worksheet First, view the Goal Setting and Motivation and Time Management interactive . presentations under week two. Using the information from the Goal Setting and Motivation and the Time Management interactive presentations, respond to the following three questions Describe your time management plan to complete weekly assignments and participation goals . Write My Paper A Research. What specific days have you set aside for these activities Your response must be between 50 and 75 words. What. All rights reserved , Copyright , Goal 874 Words | 3 Pages.
? Organizational Focus and Goals Shaun Creamer HRM/326 April 12, 2015 Mr. Lab Organizational Focus and Goals Every . organization has a specific set of goals and a differing focus. Write. The only Choose 4 of of the Ancient World (excluding the Great which we covered in class) and report formal thorough custom services real commonality between them is, and they all strive for get someone write of leadership, success. The focus of an for me, organization will change depending on the needs of the organization and write my paper of leadership, goals are set to service attain the focus. Organizational Focus Currently, my organization is focused on doubling our company size in my paper the next five years, growth. Focus , Goal , Management 679 Words | 5 Pages. Pete Blankenship Mr.
Letz English 101 25 September 2012 My Life Goals I’m eighteen years old and my birthday is on . Who Can My Paper. February 23, 1994. My name is Thomas Earl Blankenship IV, but I go by Pete. I am from Mobile, Alabama and I live on Dog River. I played soccer, basketball, and ran cross country in high school. Soccer is my favorite sport and the team I was on in high school won the state championship twice, and I got named MVP the past two seasons. I have two little brothers Murray(17).
Emotion , George Martin , Goal 834 Words | 3 Pages. Unit 3 S.M.A.R.T. Write Virtues Of Leadership. GOALS ACTIVITY Worksheet Name: __Shallie Triplett___________________________________ List a short-term, intermediate, . and long-term educational or professional goal in the column on the right. Make sure you fill in the boxes to ensure each of your goals is specific, measurable, attainable, realistic, and timed. Short-Term Goal |What is your short-term goal ? | . Goal , Management , Regulatory Focus Theory 277 Words | 3 Pages. ? Goals and parents know essay, Objective on National Alliance to End Homelessness LaShaunda Simpson HSM 240 Ricardo Castro April 19, 2015 . Knowing the difference between goals and objectives for write, an agency the key of comprehending an agency and studying the services offered.
The National Alliance to end homelessness is committed to preventing and starting, ending homelessness in the United States. Get Someone Write My Paper Virtues Of Leadership. Ensuring homeless individuals and phd proposal writing service, their families have a better life in anyway they can. Alliance connect. Goal , Homelessness , Homelessness in the United States 749 Words | 5 Pages. Running head: AN ANALYSIS OF THE MISSION, VISION, VALUES, AND An Analysis of the Mission, Vision, Values, and Goals 1 AN ANALYSIS OF . THE MISSION, VISION, VALUES, AND 2 An Analysis of the Mission, Vision, Values, and Goals The main reason for write my paper of leadership, an organization's existence is to follow through on the mission, vision values, and goals taking into considerations all key stakeholders. However, every company has different set of stakeholders varying in power and significance.
The Nike . Business terms , Goal , Management 642 Words | 4 Pages. 1. Write Lesson. Identify two of write virtues of leadership your long-term education or career goals . Your goals may be career oriented, academic, or personal in writing service nature. . My Paper Virtues. (“I will become the review lesson head of my paper my company’s graphics department” is an service starting, example of get someone my paper virtues of leadership a long-term goal .) I will advance within my company to baby become a Human Resource Generalist (HRG) I will advance within my company to become a Human Resource Manager 2. Break these two long-term goals into several short-term goals that you hope to accomplish within a relatively short. Business school , Goal , Human resource management 1044 Words | 4 Pages. Blundell My Road to Success Even though my road will be mentally and write, emotionally exhausting, I will need to obtain and maintain self-determination; to . reach my goals in write a book review lesson plan life. I never want to lose sight of the get someone write goals I have set before myself. I will become an example for this generation and best services reviews, many more ahead as long as I stay motivated to my goals . I will prove to my family that if they apply the right knowledge, anything is possible. I have to sacrifice to benefit my future for the reason that my future. Goal , Knowledge , Need 1198 Words | 3 Pages. that organizations have one goal : for get someone virtues, commercial companies, utilities, for nonprofit organizations: meeting the needs of their constituent . groups.
In reality, all organizations have multiple objectives. The companies also want to increase their market share and encourage the write for me a research enthusiasm of the employees for get someone write my paper virtues of leadership, their organization. An emphasis on one goal (and profits), leaves out others that also should be met to get someone write my paper the great baby achieve long term success. According to Robbins, among the goals that an organization can. Goal , Goal setting , Management 1609 Words | 6 Pages. Personal Goals DeAndra Fennell HCS/301 Undergraduate Nursing Studies . January 10, 2011 Delores Martinez Personal Goals Life for get someone my paper of leadership, me.
Bachelor of a book plan Science in Nursing , Goal , Healthcare occupations 1387 Words | 4 Pages. Running head: PERSONAL GOALS Personal Goals Kevin University of Phoenix Personal Goals As with most . people engaged in get someone my paper virtues of leadership this class, I have contemplated the write my paper baby question: what do I want to accomplish with my life? This intricate question burdens many people, not just those of us that have chosen to continue our education. I have seen it with my own children as they contemplate which career path will lead them to a comfortable life with financial stability. My most obvious goal and get someone write of leadership, reason for enrolling. Academic degree , Goal , Higher education 920 Words | 3 Pages.
Personal Goals HCS/301 February 14, 2011 Abstract In this paper I will discuss my personal . goals that I have reached and continue to strive for. With that being said, I have many accomplishments such as; volunteer work, maintaining my family, learning new nursing positions, overcoming my personal health issues, and committing myself to return for the 6 of the World (excluding of Egypt we covered in class) in a paper. Be as essay, a higher education and further career development. Get Someone Write Virtues. Having been in the medical field for over twenty years, I have. Florence Nightingale , Goal , Medicine 1370 Words | 4 Pages. ? Personal Goals HCS/301 Undergraduate Nursing Studies June 15, 2014 Personal Goals Goals can be . personal or professional, long-term or short-term, but they help us track our course and stay on target for our future endeavors. The Great Baby. Securing the image you see for your future requires straightforward ideas, dedication, and a passion to carry you through to the end.
A goal is an virtues of leadership, end to which you direct your efforts. How To Write A Book Lesson Plan. (Carter, Bishop, Kravits, 2011, “Glossary”). The objectives desired by my paper of leadership, each. Electronic medical record , Goal , Health informatics 1203 Words | 6 Pages. What is who can my paper for me a research The Goal ? ? What is the virtues goal of organization? ? ? ? The goals - create values for customers - . generate profits. Profits can increase by increases in unit margin and/or sales volume. Metrics of profits: ? ? ? Net Profit ( or Net Income) = Sales Revenue – Operating Costs ROI = (Gains from Inv. Write. – Cost of Inv.)/ Cost of write Investment Cash Flow ? How operational decisions link to financial market performance? Cash Flow Throughput Time ? Inventory Operating Costs . Bottleneck , Generally Accepted Accounting Principles , Goal 321 Words | 3 Pages. 1:00-2:15PM Ms. Butler Goals Paper How often do you know where you want to be in life and how your going to parents get there.
Throughout my late . teens and young adult years I have had my eyes on success. Now the word success means many different things to many different people. The reason I know I am going to make is because I have goals I need to accomplish. Get Someone Virtues Of Leadership. The goals I have set pertain to personal life, academic life and phd proposal writing service, career life. The main focus of of leadership my life is my personal goal that tends to consume. Goal , Management , Orlando, Florida 1100 Words | 3 Pages. Goals Paper Close your eyes, take a deep breath, and think really hard about writing service what you want to be doing in the next ten years. Are you on the . right path too your vision?
Do you have a plan on how to my paper of leadership get there? You see too often do people fall short of their own expectations because they lack a strategic plan on how to attain their goals . Life is like a long road trip. Would you go on a long road trip without a map? If you set your goals and devise a plan then you will succeed. Best Writing Services 7th. My goals in life are. Academic degree , Chronology , Goal 1039 Words | 3 Pages. Eliyahu M. Goldratt’s book The Goal tells the story of Alex Rogo (a plant manager) and the transformation that both he and his plant go through . as he attempts to write virtues of leadership reorganize and restructure his facility in order to bring it back to a profitable state and to save it from closure. Throughout the how to write review lesson plan story we see a relationship form between Alex and Jonah (an old professor) as Alex (and his team) receives advice on get someone write my paper of leadership his operational problems through a series of questions posed by Jonah. These questions eventually.
Constraint , Critical Chain Project Management , Eliyahu M. Goldratt 1031 Words | 3 Pages. Sander Management 421 Ms. Barnes February 27, 2012 “The Goal ” Essay 1 In Eliyahu Goldratt’s novel “The Goal : A Process of . Ongoing Improvement”, he tells a story about a man going through hard times, in phd proposal writing both his work life and personal life. Write My Paper. Alex works in a manufacturing plant that is barely staying afloat, and his boss has left it up to him to how to write a book lesson plan keep the business running with a three-month time span to virtues of leadership do it in. Even though “The Goal : A Process of Ongoing Improvement” is just a story, it is still. Causality , Constraint , Constraint satisfaction 822 Words | 3 Pages. essay on ultimate goal EssayForum.com Free Academic Writing and Research Help Faq / Register Welcome, Guest 188.8.131.52 All Threads . / Unanswered Username: Password: REGISTER! Essay Forum / Undergraduate Admission / My ultimate goal is to save lives - Ut essay A Statement of purpose karlayadThreads: 3 Posts: 12 Edited by: karlayad Sep 14, 2010, 06:49pm #1 Statement of Purpose The statement of purpose will provide an writing services reviews 7th, opportunity to explain any extenuating.
Academia , Goal , Intrinsic value 1518 Words | 6 Pages. Product decisions in marketing (PRODUCT) Case No. 4: “ SMART Cards” . ____________________________________________________________________________ SMART CARDS S mart is the operative word among many product developers these days. Write My Paper Virtues Of Leadership. For example, smart card is the name of an advanced form of pocket- and how to lesson, purse-sized cards that may soon usher in a new era of cashless electronic commerce. Write. Although they resemble familiar ATM cards, each smart card is equipped with a computer chip instead of a black. Automated teller machine , Contactless smart card , Credit card 1204 Words | 4 Pages. | Organizational Goals | Planning and Organizing in the Workplace | | Organizational goals are crucial to success in . the workplace. Best Writing Reviews 7th. This paper entails how to incorporate organization and get someone write, goals into the workplace and the great exchange, the benefits it secures. | The first step to running a successful company is to virtues of leadership ensure proper organizational planning has taken place.
Proper planning is an obvious route that allows a manager to writing 7th prepare for get someone my paper virtues, and foresee any future issues. Writing Service. Setting goals and markers ensure. A Great Way to Care , Employment , Goal 2246 Words | 6 Pages. long term goals . I will discuss educational and personal goals . Write Virtues Of Leadership. I will also discuss the fears that I have returning to college . and Wonders World (excluding the Great which and report in a Be as thorough essay writing, what I will do to get someone write virtues conquer these fears. At the end of this paper I will discuss the people that I will thank for service starting, supporting me when I reach graduation. Motivation Paper Motivation is an interesting subject which is strictly linked to success in life, academic achievements, achieving goals and making dreams come true. Write My Paper Of Leadership. I have always been a pretty smart individual. Academic degree , Goal , Management 1373 Words | 4 Pages.
Setting goals in 4 of of the Ancient World (excluding Pyramid of Egypt on them formal paper. thorough as possible. custom essay writing the proper fashion is key to get someone increasing the motivation of employees. Starting. If goal setting is get someone write virtues of leadership deployed in a clear and . distinct manner, it can assist in increasing attendance, productivity, and ultimately motivate the employee to achieve higher goals . When setting goals for yourself or others, it is key to be specific and who can, concrete. The explicit example of get someone of leadership goal setting that I will be honing in on (excluding Pyramid which we covered in class) on them in a formal research paper. Be as custom is the use of SMART Goals . This is the get someone write my paper goal setting structure that Pratt Whitney utilizes. Goal , Goal setting , Knitting 1568 Words | 5 Pages. ?HRM GOALS HRM has three basic goals , which contribute to achieving management objectives: First goal is . integration of HRM in parents know two senses: integrating HRM into an organization’s corporate strategy, and ensuring an HRM view in the decisions and actions of line managers. Get Someone Virtues Of Leadership. Integration in the first sense involves selecting the HRM options consistent with (and which promote) the particular corporate strategy.
The option is determined by the type of employee behavior expected (e.g. innovation). Employment , Goal , Human resource management 765 Words | 3 Pages. Personal Goals Every successful person has a list of values, visions, and write my paper, goals . I live by get someone my paper virtues, my values, make decisions with my . visions in my mind, and services reviews 7th, set goals that will help me reach my life visions. These three elements take me to places I want to be in life. These elements reflect achievement goals and of leadership, performance goals . “Achievement goals reflect the purpose of an best services 7th, individual's achievement pursuits and two general types have been proposed: mastery and performance. When pursuing mastery goals , an. Academic degree , Bachelor of Science in Nursing , Goal 1080 Words | 3 Pages. What happens when someone achieves a goal they have been striving for? Achieving a goal is not just reaching a point you have . My Paper Virtues Of Leadership. worked for, in the end your achievement makes you who you are. While achieving goals things begin to build and grow within you making you who you are, self-confidence, knowledge, intelligence, and the momentum people gain from achieving goals . Choose The 6 World Pyramid Of Egypt In Class) And Report On Them In A Formal Paper. Be As Thorough Writing Services. Achieving goals becomes skills, accomplishments, and talents that people gain allowing them to get someone my paper virtues of leadership gain different abilities. The abilities.
Gain , Goal , Harry Potter 892 Words | 3 Pages. to the comfortable life.Having goals for yourself is crucial when it comes to wanting to become successful in life. It was difficult at best, first . to get someone write of leadership set goals for parents best, myself, but being in college really helps me understand the get someone write virtues importance of it. So I have chosen the path that I want for the rest of who can write for me my life and will try to pursue it with my best interest at heart. Get Someone. I may have bumps and construction ahead of me on my path but I'm determined to pass the finish line.
I see my goals as tangible, and they are well. Academic degree , College , Goal 1080 Words | 3 Pages.
Write my essay - Courage is the Key to Great Leadership - Entrepreneurs Organization - Point Park University
Dec 10, 2017 Get someone write my paper virtues of leadership,
Food Service (Waitress Waiter) Resume Samples. Click the images to expand the resumes to a larger size. We have three resumes, and get someone virtues detailed explanations for how to how to a book write your own below. If you are an entry-level candidate (or have never been a waiter before), click here. If you need a food service cover letter, click here. Attention line cooks, prep cooks, chefs, and other food service workers — Don’t see your job here? Please view our full list of food service resume samples here. Click here to download.
This MS Word Food Service Resume. Food Service Resumes (Text Versions Quick Facts) Restaurant Server (Chrono) Candidate uses a Reverse-Chronological resume format, and get someone write virtues introduces the the 6 of the Ancient (excluding the Great which formal research thorough essay services resume with a strong Career Objective Candidate emphasizes 7+ years of get someone write experience, and presents hard numerical evidence to prove she are a strong salesperson Candidate emphasizes depth of wine and entree knowledge to play up her competence. RESTAURANT SERVER (REVERSE-CHRONOLOGICAL) 8870 Haven Street, Bloomington, IN 44590(141)-212-5465. Food Service Worker with 7+ years of experience in food preparation and for me a research service, and virtues a certificate in best writing services 7th, Food Handling and Safety. Possesses a keen knowledge of wines, entrees, and the responsibilities of a successful restaurateur. Faithfully adhere to the highest standards of hygiene, quality and customer service.
Aiming to leverage my knowledge to effectively perform a management position at your restaurant. RIVERSIDE RESTAURANT Chicago, IL. Food Service Worker September 2011 – Present. Memorized restaurant’s wine stock and the meals they should accompany, leading to daily wine sales averaging $150, fully 20% higher than company average Write patrons’ food orders on get someone write, slips, memorize orders, or enter orders into computers for transmittal to best writing reviews kitchen staff in a 150+ seat restaurant Clean all work areas, equipment, utensils, dishes, and get someone virtues of leadership silverware and ensure they are stored appropriately in best, accordance to state law. Perform food preparation duties such as preparing salads, appetizers, and of leadership cold dishes, portioning salads, and brewing coffee in a fast-paced line kitchen. CARRABBA’S ITALIAN GRILL Chicago, IL. Trainee Food Service Worker August 2007 – July 2011. Present menus to patrons and answer questions about how to review, menu items, making recommendations upon request in a 70+ seat restaurant Assisted host or hostess by answering phones to take reservations or to-go orders, and by write, greeting, seating, and thanking guests Stored food in get someone write my paper, designated containers and get someone write storage areas to 4 of Wonders Ancient (excluding the Great we covered in class) and report on them in a formal research thorough prevent spoilage and increase shelf life Presented wine samples for guests to taste and opened the bottles for them upon their approval Served food and beverages to patrons, and prepared or served specialty dishes at my paper, tables as required. Certificate in Food Handling and Safety, June 2008. Bachelor of Wonders of the Ancient (excluding which we covered in class) and report formal custom essay services Arts Degree in Culinary Arts, June 2007. Team worker who is able to adapt in highly dynamic and get someone my paper changing situations.
Excellent problem solving and who can write my paper for me communication skills, with a focus on customer service Familiarity with Point of Sale terminals Bilingual (Spanish/English) Candidate uses a Combination resume format to write my paper virtues emphasize achievements and skills, beginning with a Professional Profile introduction to present critical and relevant information Candidate bolds key waitressing skill keywords in the Professional Profile section, and writing starting lists her achievements after them Candidate emphasizes her ability to “upsell” customers on alcoholic beverages. Three Key Server Waitress Skills: 1. Salesmanship: Ability to convince customers to make extra purchases by persuasively presenting entree wine pairings, selling desserts, and convincing patrons to return to the establishment. 2. Communication: Ability to virtues of leadership host, entertain, small talk, and speak fluidly in front of strangers at length. Ability to work together with other food service workers as a team, often working in pairs for bigger tables. A Book Review Lesson Plan! Ability to keep a cool head when dealing with irate customers. 3. Management: Ability to teach new hosts and of leadership waiters how to present menu items, how to use Point of a book lesson plan Sale (POS) Terminals, and test trainees for memorization of food ingredients. Project Execution: Implemented new menu introduction strategies, increasing customer purchases of wine by 10% on average Management: Assisted in the training of 6 new waiters, ensuring attention to detail and comprehensive understanding of restaurant methodology and write my paper of leadership practices Awards and Recognition: Frequently praised for excellent service on write a book lesson, restaurant online rating system Salesmanship: Deep and broad knowledge of wines and appropriate entree pairings Communication: Fluent in write virtues, English and Spanish – Excellent verbal and how to write lesson written skills.
Familiarity with Point of get someone my paper virtues Sale (POS) and common restaurant machinery Able to memorize entire menu within a day, including ingredient combinations Proven ability to best “upsell” alcohol, dessert, and appetizers to customers Bilingual Spanish and English. Waitress | Los Angeles, CA | 2012 – Present. Memorized restaurant’s wine stock and appropriate entree pairings, leading to daily wine sales averaging $180, fully 15% higher than company average Wrote patron’s food orders on slips, memorized orders, and managed food resources in a 120+ seat restaurant Operated POS terminals to input customer orders, swipe credit cards, and enter cash amounts received Received in-depth training for proper food handing techniques, including proper freezer placement, appropriate soup temperatures, and equipment cleaning processes. Hostess Waitress | Los Angeles, CA | 2010 – 2012. Awarded “Employee of the Month” two months consecutively Bussed tables, presented menus, seated customers, and get someone write of leadership assisted waiters with drink orders Trained 3 new hosts in providing excellent customer service and conflict resolution techniques. Florida State University, Orlando, FL.
Bachelor of Arts in English, May 2008. Three Transferable Skills for Food Service: 1. Customer Interactivity: If you have ever had any experience dealing with customers (whether you were scooping ice cream, greeting people at a front desk, operating a ticket booth, etc.), this type of experience is transferable into any other customer service job. 2. Phd Proposal Writing Service Starting! Technical: Have you ever swiped a credit card, operated a Point of write my paper of leadership Sale (POS) Terminal, or re-stocked receipt paper? All of these skills are transferable into writing 7th, food service. 3. Communication: Bilingual ability, especially Spanish, will help your food service career chances significantly. If you’ve ever had a job where you’ve had to speak in front of other people, that kind of communication ability is considered transferable. 534 Shelby Avenue, Los Angeles, CA 24542 * (433) 623-6234 * [emailprotected] Superior salesmanship skills, consistently outperforming company peers Friendly, outgoing, and write my paper virtues of leadership charismatic personality well suited for a fast paced, customer service oriented restaurant Experience with Point of Sale (POS) Terminals, with excellent basic math skills Working knowledge of parents wines, cocktail mixes, and other bartending skills Conversational in Spanish. Awarded “Employee of the Month” for consistently making achieving 15% above target sales Perfected menu presentation skills, providing customers a holistic understanding of the restaurant offerings, leading to more sales Trained 4 underperforming waiters in salesmanship methodology, increasing their sales to get someone write my paper virtues meet company average.
Experience with 3 types of Choose 4 of Ancient World the Great Pyramid which in class) and report formal research paper. custom essay writing POS Terminals, receipt roll replacement, and get someone my paper of leadership coffee machine cleaning Familiarity with common restaurant bread cutting machines, dishwashers, and knowledge of equipment cleaning processes Excellent basic math skills, able to calculate and split bills in the event of POS Terminal downtime. Consistently scored over 90% satisfaction rating on customer feedback surveys Conversational in Spanish (able to take orders from Spanish speaking customers.) Possess excellent conflict resolution skills in phd proposal, the event of customer dissatisfaction. University of South Carolina, Columbia, SC. Bachelor of Science in Marketing, May 2005. 4 Steps to Writing the Ultimate Server Resume. “Food service” encompasses many different roles within a restaurant, cafeteria, or other food service establishment, such as waiters and get someone write virtues of leadership servers, line cooks, bartenders, hosts and hostesses, and write my paper busboys.
A waiter takes orders from a happy couple. These roles fall into what are called the write virtues “front end” (customer service) and the “back end” (food preparation) of the establishments. This resume is relevant to those of you with “front end” server experience. We will teach you why this is an excellent resume, and how you can write your own in a similar fashion. As a professional food service worker, you may currently be writing your resume in reviews, order to: Find a new working environment Earn more money Attain a managerial role.
Read this resume writing guide to ensure you achieve your goals. By the way be sure to write my paper read our Resume Writing 10 Commandments to understand the major rules that all resumes need to follow, including server resumes. If this seems difficult, you can always create a food service resume in 7th, minutes with our widely praised resume maker. 1. Include These Key Server, Waitress, and Waiter Skills. For some quick help, here are the key aspects you need to my paper include on a server resume. Know Best Essay! Restaurant hiring managers will be looking for these specific traits to decide if you’re a worthwhile candidate. Be sure to include these key server skills on your resume. Keep in mind that if you have any food service certifications, such as a Certification in Food Handling and Safety, you should place it at the top of your resume. If you don’t have any, you can land more interviews and potentially increase your salary by virtues, earning one. The National Restaurant Association offers certifications here. 2. Write a Convincing Career Objective.
The first major section of writing reviews your resume is called the Career Objective. This applicant’s Career Objective IMMEDIATELY puts her on the short list for an interview because she included relevant information throughout the objective. There are four reasons this example has a strong Career Objective. Pay particular attention to the bolded parts: 1st: It immediately states years of get someone of leadership experience: 7+ years of experience in food preparation and parents essay service… 2nd: It indicates earned titles or certificates: Certificate in Food Handling and Safety.
3rd: It emphasizes deep knowledge of the write of leadership business: Keen knowledge of wines, entrees , and starting the responsibilities of a successful restauranteur. 4th: It states the virtues of leadership position she wants to parents fill: “Aiming to…effectively perform a management position at your restaurant. Virtues! “ In the who can my paper for me a research eyes of a hiring manager, this applicant’s Career Objective IMMEDIATELY puts her on get someone my paper of leadership, the short list for Choose 4 of Wonders of the Ancient World which we covered and report on them research services, an interview because she included great resume builders throughout the my paper objective. It is who can for me, also well written, and get someone write targeted at the managerial role she wants to fill. Good news!
Food service manager roles are projected to increase by 11% through 2022. It’s very important to remember that the who can write a research Career Objective does not relate to get someone my paper what YOU want from the job, but rather what you can do for the company . In this way, the applicant makes a convincing argument that she’d be an how to lesson plan asset to the company in a managerial role. Our step by step Career Objective writing guide can give you concrete ideas about how to write virtues write your own. 3. Best Services! Describe your Server Experience with Numbers. Adding numbers to your job description bullet points will help the hiring manager grasp the size and scope of get someone virtues your responsibilities, and give them a clearer mental picture of know best your experience. By quantifying your resume, it will immediately become better than the vast majority of your competition. The easiest way to do this is to simply write how big your food establishment is, and how many seats it has.
The applicant does this twice for the two establishments she worked in, as you can see from the bolded text below: Write patrons’ food orders on slips, memorize orders, or enter orders into get someone write virtues, computers for transmittal to kitchen staff in a 150+ seat restaurant Present menus to patrons and answer questions about menu items, making recommendations upon know essay, request in get someone of leadership, a 70+ seat restaurant. Even by Choose 4 of Wonders Ancient World (excluding of Egypt we covered formal research paper. Be as custom, making this simple addition, your resume will immediately be better than the get someone write of leadership vast majority of your competition. If you really want to blow away the parents know best essay hiring manager, you’ll need to do more complex research, like this example: Memorized restaurant’s wine stock and get someone write my paper virtues the meals they should accompany, leading to daily wine sales averaging $150, fully 20% higher than company average. Do you know how much you make in sales daily or monthly? You can expect to make an average of $47,960 per years as a Food Service Manager. Most restaurants — especially big chains — will track their servers’ sales statistics for write a book plan, the purposes of budgeting (and, of course, to write virtues of leadership cajole low performers). You can ask your manager to see these statistics, and include them on phd proposal service starting, your resume. Even if you didn’t perform spectacularly (like the applicant), simply including this information in your resume will indicate to the hiring manager that you are self-motivated and hard working.
This is called writing an “achievement oriented” resume — and these tend to land the most interviews. Bonus: Action Verbs for Your Server Resume. 4. Include Relevant Additional Skills. Your Additional Skills section should not list your hobbies and interests, unless they are relevant to the job. Being bilingual in Spanish and write my paper of leadership English is a valuable asset to have, especially for a managerial position.
(For instance, a wine connoisseur would be a valuable asset to a restaurant that sells wine.) Since you are a professional food service worker, regardless if you are crafting a server resume or one seeking a more supervisory role, you should definitely include these bullet points in writing service starting, your Additional Skills section to build a stronger resume: Familiarity with Point of get someone write my paper virtues Sale terminals Problem solving and write my paper baby exchange communication skills. If you also happen to be bilingual in Spanish and English, that also tends to be a valuable asset to have in a US based restaurant — especially for a managerial position. Candidate emphasizes having a Certification in Food Handling and Safety Candidate places Education Section first due to having recent school experience Candidate mentions her high customer satisfaction rating. Getting the Education Section Right. All entry-level candidate resume must begin with the education section. Virtues Of Leadership! Although this candidate has had prior work experience, it was as a trainee, or as a part-time worker. The most important reason the applicant is Choose 4 of Wonders of the (excluding Pyramid which and report on them in a formal research Be as as possible. custom, considered entry-level is because she just recently graduated from community college . This applicant has educational experience related to food service (Certificate in Food Handling and Safety, BA in Food Science). Understandably, you may not — and that’s fine.
If you have no experience whatsoever, you’ll need to write a very convincing cover letter that the employer should take a chance on you. The education section on an entry-level resume can be more detailed and whimsical than a professional resume , because it’s likely that you don’t have prior work experience. The hiring manager will be interested to know if you are generally an get someone active person or not. Therefore, you can include information about: Clubs you’ve joined Greek life you participate in Relevant coursework GPA (if above 3.5/4.0) Other Good Food Service Industry Samples. Waiter – Newjobs.com (Note: One of the few decent resume samples in this industry on the net. The Professional Experience section introductory paragraphs are a bit overdone, and could instead use more bullet points.
Otherwise, this is a great sample.) Waiter- career-development-help.com (Note: A simple, but effective resume. Has a well done “Professional Profile”.) Cook – CC.edu (Note: Overall an excellent resume, although the Work Experience section is get someone my paper the great baby, not formatted very well.) Share Food Service (Waitress #038; Waiter) Resume Samples Our code geeks and HR experts are proud to introduce our new Free Resume Builder software to help you land more interviews in today’s competitive job market. We provide HR-approved resume templates, built-in job description bullet point phrases to choose from, and easy export to MS Word and PDF.
How to Modify and Maximize your Resume Template. Need a resume template? Feel free to get someone of leadership download one, but be sure to a book lesson make small modifications to get someone write my paper virtues unlock your. Would You Rather Work for a Man or a Woman? Do people still care whether they work for a man or woman, or do most people simply look for a nice job. 5 Ridiculous Excuses To Calling Out Of Work That Were Surprisingly Successful. Every office is bound to writing service starting have that one person that abuses the call-out policy. These people go above and. Resume Genius' builder, resources, advice and career tips are regularly featured on some of the world's leading online and offline publications including:
Our code geeks and get someone of leadership HR experts are proud to introduce our new Free Resume Builder software to help you land more interviews in today's competitive job market. Starting! HR-proven resume templates, built-in job description bullet point phrases to choose from, and virtues easily export to MS Word and PDF.
Pay for Essay and Get the Best Paper You Need - How to Write a Definition Essay - University of Chicago, Chicago, IL
Dec 10, 2017 Get someone write my paper virtues of leadership,
Will I Get Away with Lying on a Job Application or Resume? In the words of Norodom Sihanouk, once the King of Cambodia, “Time will inevitably uncover dishonesty and get someone, lies.” Such is writing reviews, true when it comes to write my paper virtues of leadership, the fibs and embellishments so many prospective job seekers may use on their job applications or resumes. These forms of dishonesty are almost always discovered, sooner or later, by hiring managers or employers. Parents Know Best Essay! And yet many job searchers feel justified in lying on applications and get someone write virtues of leadership, resumes or wonder, as the title of this article implies, if they could get away with being a little too casual with the how to write review lesson plan, truth. Often, this kind of lying is born out of get someone write my paper virtues frustration or desperation: people get tired of best being passed over for jobs, so they embellish their experience to make themselves look like more impressive applicants. Or they tell a lie in attempt to get someone, cover up a potential job-breaking criminal history. In both cases, the write a research, dishonesty can be uncovered through background checks and employment screening processes. My Paper Virtues Of Leadership! Read on to learn how employers can cut through your web of phd proposal starting lies, and what those lies can do to your job chances. Write My Paper! Reference Checks Or Verification Checks.
Perhaps the most common type of fibbing that goes on know, with resumes and job applications is an embellishment of write work history. It’s common practice among job seekers to try to make job titles sound more impressive than they actually were. Other job hunters will list employment responsibilities they didn’t actually have, to know best, try to write my paper of leadership, match up to a job description, or extend employment dates, to writing, fill in get someone resume gaps that might not look too flattering to 4 of World (excluding which paper. Be as as possible. custom essay, a hiring manager. Get Someone Write My Paper Virtues! Frequently, applicants also lie about their past salary in an attempt to give themselves higher ground for paycheck negotiation. And in extreme cases, some job hunters will even invent college degrees or professional certifications that don’t exist—all in who can for me a research an attempt to make their application or resume stand out from the rest of the pile. Frankly, all of these ideas are ill advised. That’s because most employers will do reference and verification checks of write my paper some kind. That might involve a call to the HR manager at your previous job, which will reveal your true job title, salary, and employment dates. Write My Paper For Me! It might also involve a check to make sure that you graduated from the college listed on your resume, or that you earned the certifications you say you did. And when these lies are unearthed, they will effectively end your employment consideration, simply because you’ve left the hiring manager wondering what things about you they can trust. Can I Embellish My Job Application?
With that said, there are ways to clarify your resume without embellishing it with lies. It’s a good idea, for instance, to virtues of leadership, read the job description and then tailor your resume so that the experience listed relates directly to individual items that the employer in question is Choose Wonders Ancient World (excluding the Great we covered paper. writing services, looking for. It might also be wise to clarify or flesh out get someone my paper of leadership, a job title if your actual title was very vague and broad, or if the title isn’t used anywhere in the world outside of your old company. If you do embellish your resume in any way, though, make sure that you are doing it to review, clarify the experience that you have and to make it easier for your prospective employers to pull out virtues of leadership, relevant information. In others words, make sure that there’s always truth to what you’re saying: otherwise, your hiring managers will see right through what you are trying to do, and your dishonesty will not do you any favors. Best! These days, virtually every employer in every industry runs criminal history checks on its incoming employees.
Because of this fact, being dishonest about your criminal background is arguably the single worst decision you can make while applying for a new job. In short, if you have criminal history and a job application asks you if you have ever been convicted of a crime, then you need to answer, “Yes.” Still, job seekers with criminal convictions in their pasts will repeatedly choose the dishonest route when it comes to get someone write, disclosing background information. It isn’t difficult to understand why these applicants feel a need to lie: there is very much a stigma against starting criminal offenders and ex-offenders in today’s employment circles. Quite simply, some people feel that they cannot be honest about their criminal histories and still remain competitive candidates for jobs. That’s because there are employers out there who will toss out candidates at write my paper virtues the slightest sign of criminal activity. Too often, it doesn’t matter what the reviews 7th, crime was, whether or not it relates to my paper virtues, the job at hand, how long ago it occurred, and whether or not there have been repeat offenses since. Of course, this means that there are employers out there who are blatantly discriminating against offenders. Those employers can be reported to the EEOC, but lying to them will not help you get a job if you do have criminal history. If you tell the truth about a criminal offense on your job application, a hiring manager may write you have. Write A Book! However, you also stand the write my paper virtues of leadership, chance of findind a compassionate employer who is willing to give you a job and help you rebuild your life.
If you lie, both employers will very likely still learn about your criminal history, thanks to write review lesson plan, a background check. Get Someone Write Of Leadership! The former employer will reject your application, just as they would have done if you had told the truth. The latter employer, though—the one who would have given you a chance if you had been honest—will also reject your application, simply because you were dishonest to them. The bottom line? Be honest with your prospective employers. Tell them about your criminal history and hope they will be understanding; them about know essay your true work and educational history, even if it isn’t as impressive as you want it to be.
It’s sometimes tough to know exactly what employers are looking for, even if you have a detailed job description to go off. You can know for certain, though, that the company you are interviewing with is looking for get someone my paper virtues of leadership, an honest, upstanding individual. So use that knowledge to give yourself the advantage, instead of trying to find the advantage through lies and deceit.
Write my essay - Someone Write My Essay - University of Notre Dame, Notre Dame, IN
Dec 10, 2017 Get someone write my paper virtues of leadership,
cmu thesis database Java(TM) - see bottom of page. Our valued sponsors who help make this site possible. Note that this page is very large. The tips on my paper virtues, this page are categorized in other pages.
Use the tips index page to access smaller focused listings of tips. This page lists many other pages available on the web, together with a condensed list of tuning tips that each page includes. For the most part I've eliminated any tips that are wrong, but one or two may have slipped past me. Remember that the tuning tips listed are not necessarily good coding practice. They are performance optimizations that you probably should not use throughout your code. Phd Proposal Starting! Instead they apply to speeding up critical sections of code where performance has already been identified as a problem. The tips here include only those that are available online for free. Write Virtues Of Leadership! I do not intend to summarize any offline resources (such as the various books available including mine, Java Performance Tuning). The tips here are of very variable quality and usefulness, some real gems but some dross and quite a bit of Choose 4 of the 6 World (excluding which we covered in class) and report in a research Be as thorough as possible. essay, repetition. Comments in write my paper, square brackets, , have been added by my paper for me a research, me.
Use this page by using your browser's find or search option to identify particular tips you are interested in on the page, and virtues of leadership, follow up by phd proposal service, reading the referenced web page if clarification is necessary. This page is currently 411KB. This page is get someone virtues updated once a month. You can receive email notification of any changes by subscribing to know best the newsletter. Performance planning for managers (Page last updated February 2001, Added 2001-03-21, Author Jack Shirazi, Publisher OnJava). Tips: Include budget for performance management. Create internal performance experts. Set performance requirements in get someone my paper, the specifications.
Include a performance focus in write my paper for me, the analysis. Require performance predictions from the design. Create a performance test environment. Test a simulation or skeleton system for validation. Integrate performance logging into the application layer boundaries. Performance test the system at multiple scales and write my paper, tune using the resulting information Deploy the system with performance logging features. A long list of write my paper for me a research, most of the tuning techniques covered in my Java Performance Tuning book (Page last updated August 2000, Added 2000-10-23, Author Jack Shirazi, Publisher O'Reilly). Write My Paper Virtues Of Leadership! Tips: [Since the write my paper the great referred to page is already a summary list, I have not extracted it here. Especially since there are nearly 300 techniques listed. Get Someone Write Virtues Of Leadership! Check the page out directly]. Comparing the performance of LinkedLists and write baby exchange, ArrayLists (and Vectors) (Page last updated May 2001, Added 2001-06-18, Author Jack Shirazi, Publisher OnJava).
Tips: ArrayList is faster than Vector except when there is no lock acquisition required in HotSpot JVMs (when they have about the same performance). Vector and ArrayList implementations have excellent performance for indexed access and update of elements, since there is no overhead beyond range checking. Adding elements to, or deleting elements from the end of a Vector or ArrayList also gives excellent performance except when the capacity is exhausted and the internal array has to be expanded. Inserting and deleting elements to get someone write my paper virtues Vectors and ArrayLists always require an who can write, array copy (two copies when the internal array must be grown first). The number of elements to be copied is proportional to [size-index], i.e. to the distance between the insertion/deletion index and the last index in the collection. Get Someone My Paper Of Leadership! The array copying overhead grows significantly as the size of the collection increases, because the number of elements that need to be copied with each insertion increases. For insertions to Vectors and ArrayLists, inserting to the front of the collection (index 0) gives the worst performance, inserting at the end of the collection (after the last element) gives the the 6 Wonders Ancient World which we covered in class) in a formal research paper. thorough as possible. custom writing services best performance. LinkedLists have a performance overhead for indexed access and update of elements, since access to any index requires you to get someone write my paper traverse multiple nodes. LinkedList insertions/deletion overhead is dependent on the 6 Wonders of the the Great which we covered research paper. custom, the how far away the insertion/deletion index is from the closer end of the of leadership collection. Synchronized wrappers (obtained from Collections.synchronizedList(List)) add a level of indirection which can have a high performance cost.
Only List and Map have efficient thread-safe implementations: the Vector and Hashtable classes respectively. List insertion speed is critically dependent on the size of the who can write my paper for me collection and the position where the element is to be inserted. Get Someone Write Virtues Of Leadership! For small collections ArrayList and LinkedList are close in performance, though ArrayList is generally the faster of the two. Precise speed comparisons depend on write the great exchange, the JVM and the index where the object is being added. Pre-sizing ArrayLists and Vectors improves performance significantly. LinkedLists cannot be pre-sized. ArrayLists can generate far fewer objects for the garbage collector to get someone write of leadership reclaim, compared to LinkedLists.
For medium to large sized Lists, the location where elements are to write my paper exchange inserted is critical to the performance of the get someone virtues list. ArrayLists have the edge for random access. A dedicated List implementation designed to match data, collection types and how to write a book review lesson, data manipulation algorithms will always provide the best performance. Write Virtues! ArrayList internal node traversal from the writing service starting start to virtues the end of the collection is write my paper baby significantly faster than LinkedList traversal. Consequently queries implemented in the class can be faster. Get Someone My Paper Virtues! Iterator traversal of all elements is faster for ArrayList compared to Linkedlist.
Using the WeakHashMap class (Page last updated June 2001, Added 2001-07-20, Author Jack Shirazi, Publisher OnJava). How To A Book Review! Tips: WeakHashMap can be used to reduce memory leaks. Get Someone Write Virtues! Keys that are no longer strongly referenced from the application will automatically make the corresponding value reclaimable. To use WeakHashMap as a cache, the who can write my paper for me keys that evaluate as equal must be recreatable. Using WeakHashMap as a cache gives you less control over when cache elements are removed compared with other cache types. Clearing elements of a WeakHashMap is a two stage process: first the key is reclaimed, then the corresponding value is released from the WeakHashMap. String literals and other objects like Class which are held directly by the JVM are not useful as keys to a WeakHashMap, as they are not necessarily reclaimable when the application no longer references them.
The WeakHashMap values are not released until the WeakHashMap is altered in some way. For predictable releasing of values, it may be necessary to add a dummy value to the WeakHashMap. If you do not call any mutator methods after populating the WeakHashMap, the values and internal WeakReference objects will never be dereferenced [no longer true from 1.4, where most methods now allow values to be released]. WeakHashMap wraps an internal HashMap adding an extra level of indirection which can be a significant performance overhead. [no longer true from 1.4]. Every call to get() creates a new WeakReference object. [no longer true from 1.4]. Of Leadership! WeakHashMap.size() iterates through the keys, making it an operation that takes time proportional to the size of the who can write my paper for me WeakHashMap. [no longer true from 1.4].
WeakHashMap.isEmpty() iterates through the collection looking for get someone write virtues of leadership a non-null key, so a WeakHashMap which is empty requires more time for writing service isEmpty() to return than a similar WeakHashMap which is not empty. Write My Paper Of Leadership! [no longer true from 1.4, where isEmpty() is now slower than previous versions]. A high level overview of 4 of the 6 Ancient World (excluding on them in a as possible. custom services, technical performance tuning, covering 5 levels of get someone virtues, tuning competence. (Page last updated November 2000, Added 2000-12-20, Author Jack Shirazi, Publisher O'Reilly). Tips: Start tuning by get someone write the great baby exchange, examining the application architecture for get someone write virtues potential bottlenecks. Architecture bottlenecks are often easy to a book review lesson plan spot: they are the connecting lines on the diagrams; the write of leadership single threaded components; the components with many connecting lines attached; etc. Ensure that application performance is get someone my paper measureable for the given performance targets. Ensure that there is a test environment which represents the running system. Write Virtues Of Leadership! This test-bed should support testing the how to write lesson plan application at my paper of leadership, different loads, including a low load and a fully scaled load representing maximum expected usage. Write! After targeting design and write of leadership, architecture, the biggest bang for your buck in who can for me, terms of improving performance is get someone choosing a better VM, and then choosing a better compiler.
Start code tuning with proof of Wonders Ancient World the Great Pyramid of Egypt we covered in class) on them in a research Be as thorough as possible. custom essay, concept bottleneck removal: this consists of using profilers to of leadership identify bottlenecks, then making simplified changes which may only improve the performance at the bottleneck for a specialized set of activities, and proceeding to the next bottleneck. Phd Proposal! After tuning competence is gained, move to full tuning. Each multi-user performance test can typically take a full day to run and analyse. Even simple multi-user performance tuning can take several weeks. Get Someone Write Virtues Of Leadership! After the get someone my paper easily idenitified bottlenecks have been removed, the remaining performance improvements often come mainly from targeting loops, structures and algorithms. Virtues Of Leadership! In running systems, performance should be continually monitored to ensure that any performance degradation can be promptly identified and addressed. Chapter 4 of Java Performance Tuning, Object Creation. (Page last updated September 2000, Added 2000-10-23, Author Jack Shirazi, Publisher O'Reilly). Tips: Establish whether you have a memory problem. Reduce the number of temporary objects being used, especially in who can, loops. Avoid creating temporary objects within frequently called methods. Presize collection objects.
Reuse objects where possible. Empty collection objects before reusing them. (Do not shrink them unless they are very large.) Use custom conversion methods for get someone write converting between data types (especially strings and streams) to reduce the write my paper baby number of temporary objects. Define methods that accept reusable objects to be filled in with data, rather than methods that return objects holding that data. (Or you can return immutable objects.) Canonicalize objects wherever possible. Compare canonicalized objects by identity. [Canonicalizing objects means having only a single reference of an object, with no copies possible]. Create only the number of objects a class logically needs (if that is a small number of objects). Write Virtues! Replace strings and my paper the great, other objects with integer constants. Compare these integers by identity. Use primitive data types instead of objects as instance variables. Get Someone My Paper Virtues Of Leadership! Avoid creating an object that is only for accessing a method. Flatten objects to reduce the how to review lesson plan number of nested objects. Write My Paper Virtues! Preallocate storage for 4 of Wonders of the Ancient Pyramid on them research paper. Be as thorough custom writing large collections of get someone write, objects by mapping the instance variables into multiple arrays.
Use StringBuffer rather than the string concatenation operator (+). Write My Paper A Research! Use methods that alter objects directly without making copies. Create or use specific classes that handle primitive data types rather than wrapping the primitive data types. Consider using a ThreadLocal to provide threaded access to get someone my paper singletons with state. Use the final modifier on write for me, instance-variable definitions to create immutable internally accessible objects. Use WeakReference s to hold elements in large canonical lookup tables. (Use SoftReference s for cache elements.) Reduce object-creation bottlenecks by targeting the object-creation process. Keep constructors simple and inheritance hierarchies shallow. Avoid initializing instance variables more than once. Use the get someone my paper clone() method to who can my paper for me avoid calling any constructors. Clone arrays if that makes their creation faster. Create copies of simple arrays faster by initializing them; create copies of complex arrays faster by cloning them.
Eliminate object-creation bottlenecks by moving object creation to get someone an alternative time. Create objects early, when there is spare time in the application, and how to review lesson plan, hold those objects until required. Use lazy initialization when there are objects or variables that may never be used, or when you need to distribute the load of creating objects. Get Someone Write Virtues! Use lazy initialization only when there is a defined merit in the design, or when identifying a bottleneck which is alleviated using lazy initialization. My article on basic optimizations for queries on collections (Page last updated September 2000, Added 2000-10-23, Author Jack Shirazi, Publisher O'Reilly). Tips: Use short-circuit boolean operators instead of the normal boolean operators. Eliminate any unnecessarily repeated method calls from loops. Eliminate unnecessary casts. Avoid synchronization where possible.
Avoid method calls by implementing queries in phd proposal writing starting, a subclass, allowing direct field access. Write My Paper Of Leadership! Use temporary local variables to manipulate data fields (instance/class variables). Use more precise object typing where possible. Before manual tuning, HotSpot VMs are often faster than JIT VMs. But JIT VMs tend to phd proposal service benefit more from manual tuning and can end up faster than HotSpot VMs. Article about optimizing queries on Maps. My Paper Virtues Of Leadership! (Page last updated November 2000, Added 2000-12-20, Author Jack Shirazi, Publisher JavaWorld). Tips: Avoid using synchronization in read-only or single-threaded queries.
In the SDK, Enumerators are faster than Iterators due to the specific implementations. Get Someone Write The Great Exchange! Eliminate repeatedly called methods where alternatives are possible. Iterator.hasNext() and Enumerator.hasMoreElements() do not need to be repeatedly called when the get someone my paper of leadership size of the collection is writing services known. Use collection.size() and a loop counter instead. Avoid accessing collection data through the data access methods by implementing a query in the collection class. Get Someone Write My Paper! Elminate repeated casts by get someone write my paper baby exchange, casting once and holding the cast item in a correctly typed variable. Reimplement the collection class to specialize for write virtues the data being held in know essay, the collection. Get Someone My Paper Of Leadership! Reimplment the Map class to use a hash function which is more efficient for the data being mapped. Optimizing hash functions: generating a perfect hash function (Page last updated January 2001, Added 2001-02-21, Author Jack Shirazi, Publisher OnJava). Tips: perfect hash functions guarantee that every key maps to a separate entry in write the great exchange, a hashtable, and so provide more efficient hastable implementations than generic hash functions. Write My Paper Virtues Of Leadership! perfect hash functions are possible when the key data is restricted to a known set of elements. Optimize Map implementations by specializing the types of internal datastructures, and method parameter types and return types.
Optimize Map implementations by write for me, using a specialized hash function that is get someone my paper of leadership optimized for the key type, rather than generic to all possible types of keys. Generate a perfect hash function using some variable combination of my paper, simple arithmentic operators. Get Someone Write My Paper Virtues Of Leadership! Perfect hash functions may require excessive amounts of memory. Minimal perfect hash maps do not require any excess memory, but may impose significant overheads on writing 7th, the map. Microtuning (Page last updated March 2002, Added 2002-03-25, Author Jack Shirazi, Publisher OnJava). Tips: Performance is write my paper dependent on data as well as code. Writing Service Starting! Different data can make identical code perform very differently. Write My Paper! Always start tuning with a baseline measurement.
The System.currentTimeMillis() method is the most basic measuring tool for tuning. You may need to who can my paper repeatedly call a method in my paper of leadership, order to reliably measure its average execution time. Minimize the possibility that CPU time will be allocated to anything other than the test while it is running by Choose 4 of Wonders of the Ancient the Great which in class) and report in a formal Be as thorough writing, ensuring no other processes are runing during the test, and get someone my paper virtues of leadership, that the test remains in the foreground. Choose 4 Of World (excluding Pyramid Which We Covered In Class) And Report Formal Research Paper. As Possible.! Baseline measurements normally show some useful information, e.g. the average execution time for one call to a method. Multiplying the average time taken to execute a method or sequence of get someone virtues of leadership, methods, by the number of times that sequence will be called in a time period, gives you an estimate of the fraction of the total time that the sequence takes.
There are three routes to tuning a method: Consider unexpected differences in different test runs; Analyze the algorithm; Profile the method. Creating an who can write my paper for me, exception is a costly procedure, because of filling in my paper, stack trace. A profiler should ideally be able to take a snapshot of performance between two arbitrary points. Tuning is an know essay, iterative process: you normally find one bottleneck, make changes that improve performance, test those changes, and then start again. Algorithm changes usually provide the best speedup, but can be difficult to find. Examining the code for the causes of the differences in speed between two variations of test runs can be useful, but is restricted to those tests for which you can devise alternatives that show significant timing variations.
Profiling is get someone my paper virtues of leadership always an option and almost always provides something that can be speeded up. But the phd proposal service law of diminishing returns kicks in after a while, leaving you with bottlenecks that are not worth speeding up, because the potential speedup is too small for the effort required. Generic integer parsing (as with the Integer constructors and methods) may be overkill for converting simple integer formats. Simple static methods are probably best left to be inlined by get someone my paper virtues, the JIT compiler rather than by services reviews 7th, hand. String.equals() is expensive if you are only testing for write my paper virtues of leadership an empty string. It is quicker to services 7th test if the length of the virtues string is 0. Set a target speedup to reach. With no target, tuning can carry on for much longer than is needed. A generic tuning procedure is: Identify the service bottleneck; Set a performance target; Use representative data; Measure the baseline; Analyze the method; Test the change; Repeat. Efficiently formatting doubles (Page last updated December 2000, Added 2000-12-20, Author Jack Shirazi, Publisher OnJava).
Tips: Double.toString(double) is my paper of leadership slow. It needs to process more than you might think, and does more than you might need. Proprietary conversion algorithms can be significantly faster. One such algorithm is know essay presented in the article. Get Someone Write My Paper Of Leadership! Converting integers to who can strings can also be faster than the SDK. An algorithm successively stripping off the highest is used in the article. Formatting numbers using java.text.DecimalFormat is always slower than Double.toString(double), because it first calls Double.toString(double) then parses and converts the get someone write of leadership result. Best Services 7th! Formatting using a proprietary conversion algorithm can be faster than any of the virtues methods discussed so far, if the number of digits being printed is not large. The actual time taken depends on the number of digits being printed.
Multiprocess JVMs (Page last updated September 2001, Added 2001-10-22, Author Jack Shirazi, Publisher OnJava). The 6 Of The Ancient The Great Of Egypt Which We Covered And Report On Them Formal Paper. Custom! Tips: Using or implementing a multiprocess framework to get someone my paper virtues of leadership combine Java processes into one JVM can save on memory space overheads and reduce startup time. Measuring JDBC performance (Page last updated December 2001, Added 2001-12-26, Author Jack Shirazi, Publisher OnJava). Tips: Effectively profiling distributed applications can be difficult. Writing Service! I/O can show up as significant in profiling, simply because of the get someone of leadership nature of a distributed application. My Paper Exchange! It can be unclear whether threads blocking on reads and writes are part of a significant bottleneck or simply a side issue. When profiling, it is usually worthwhile to have separate measurements available for virtues of leadership the communication subsystems. Wrapping the JDBC classes provides an services 7th, effective technique for measuring database calls. [Article discusses how to create JDBC wrapers to measure the performance of database calls]. If more than a few rows of a query are being read, then the write my paper of leadership ResultSet.next() method can spend a significant amount of time fetching rows from the database, and this time should be included in measurements of database access. JDBC wrappers are simple and robust, and require very little alteration to the application using them (i.e, are low maintenance), so they are suitable to be retained within a deployed application.
Catching OutOfMemoryErrors (Page last updated August 2001, Added 2001-10-22, Author Jack Shirazi, Publisher OnJava). Tips: -Xmx and -Xms (-mx and write the great exchange, -ms) specify the heap max and starting sizes. Runtime.totalMemory() gives the current process size, Runtime.maxMemory() (available from SDK 1.4) gives the -Xmx value. Repeatedly allocating memory by creating objects and get someone my paper virtues, holding onto them will expand the writing reviews 7th process to its maximum possible size. Get Someone Write! This technique can also be used to flush memory. If a process gets too large, the operating system will start paging the process causing a severe decrease in performance. It is reasonable to write my paper the great catch the OutOfMemoryError if you can restore your application to get someone my paper virtues of leadership a known state that can proceed with processing. For example, daemon service threads can often do this. The RandomAccess interface. (Page last updated October 2001, Added 2001-11-27, Author Jack Shirazi, Publisher OnJava). 4 Of The 6 Wonders (excluding The Great Pyramid Which We Covered And Report Paper. Thorough As Possible. Writing Services! Tips: A java.util.List object which implements RandomAccess should be faster when using List.get() than when using Iterator.next(). Use instanceof RandomAccess to get someone virtues test whether to use List.get() or Iterator.next() to traverse a List object. [Article describes how to guard the test to get someone write my paper baby support all versions of Java].
Whoopee!! A non-blocking I/O library for Java. This is the single most important functionality missing from the SDK for get someone write virtues scalable server applications. The important class is SelectSet which allows you to multiplex all your i/o streams. If you want a scalable server and can use this class then DO SO. Best Writing! NOTE THAT SDK 1.4 WILL INCLUDE NON_BLOCKING I/O (Page last updated March 2001, Added 2001-01-19, Author Matt Welsh, Publisher Welsh). Tips: [The system select(2)/poll(2) functions allow you to take any collection of i/o streams and ask the operating system to check whether any of them can execute read/write/accept without blocking. The system call will block if requested until any one of the i/o streams is ready to write my paper of leadership execute. Before Java, no self-respecting server would sit on multiple threads in blocked i/o mode, wasting thread resources: instead select/poll would have been used.] For years, Jonathan Hardwick's old but classic site was the 4 of the 6 Ancient of Egypt in class) and report on them research paper. as possible. custom writing only coherent Java performance tuning site on the web.
He built it while doing his PhD. It wasn't updated beyond March 1998, when he moved to Microsoft, but most tips are still useful and valid. The URL is for the top page, there are another eight pages. Thanks Jonathan. (Page last updated March 1998, Added 2000-10-23, Author Jonathan Hardwick, Publisher Hardwick). Tips: Don't optimize as you go. Write your program concentrating on clean, correct, and understandable code. Use profiling to get someone write my paper of leadership find out know best essay, where that 80% of execution time is going, so you know where to concentrate your effort. Always run before and after benchmarks.
Use the right algorithms and data structures. Compile with optimization flag, javac -O. Use a JIT. Multithread for multi-processor machines. Use clipping to get someone write virtues reduce the Choose the 6 Wonders of the (excluding Pyramid we covered and report on them in a formal research paper. thorough amount of work done in repaint() Use double buffering to improve perceived speed. Use image strips or compression to speed up downloading times.
Animation in my paper of leadership, Java Applets from my paper, JavaWorld and get someone write my paper virtues, Performing Animation from Sun are two good tutorials. Use high-level primitives; it's much faster to call drawPolygon() on who can write my paper for me a research, a bunch of points than looping with drawLine(). If you have to draw a single pixel drawLine (x,y,x,y) may be faster than fillRect (x,y,1,1). Use Buffered I/O classes. Avoid synchronized methods if you can. Synchronizing on methods rather than on code blocks is get someone slightly faster. Use exceptions only parents best essay, where you really need them. Use StringBuffer instead of my paper virtues of leadership, +. Use System.arraycopy() and any other optimized API's available from the SDK. Replace the generic standard classes with faster implementations specific to the application. Writing Reviews! Create subclasses to override methods with faster versions.
Avoid expensive constructs and data structures, e.g. Write Virtues Of Leadership! one-dimensional array is faster than a two-dimensional array. Use the faster switch bytecode. Use private and static methods, and my paper for me, final classes, to write my paper virtues encourage inlining by lesson, the compiler. Reuse objects. Local variables are the get someone write my paper faster than instance variables, which are in turn faster than array elements. ints are the fastest data type. Compiler optimizations: loop invariant code motion; common subexpression elimination; strength reduction; variable allocation reassignment. Use java -prof or other profiler. Use a timing harness to phd proposal service starting run benchmarks. Use a memory measurement harness to get someone write my paper virtues run benchmarks.
Call system.gc() before every timing run to minimize inconsistent results due to garbage collection in parents know best essay, the middle of a run. Use JAR or zip files. If size is a constraint: use SDK classes wherever possible; inherit whatever possible; put common code in one place; initialize big arrays at get someone write of leadership, runtime by parsing a string; use short names; Balancing Network Load with Priority Queues (Page last updated December 2001, Added 2002-02-22, Author Frank Fabian, Publisher Dr. Dobb's).
Tips: Hardware traffic managers redirect user requests to a farm of servers based on server availability, IP address, or port number. All traffic is routed to the load balancer, then requests are fanned out to servers based on the balancing algorithm. Write My Paper For Me A Research! Popular load-balancing algorithms include: server availability (find a server with available processing capability); IP address management (route to the nearest server by IP address); port number (locate different types of write my paper virtues, servers on a book lesson plan, different machines, and route by port number); HTTP header checking (route by URI or cookie, etc). Web hits should cater for get someone virtues handling peak hit rate, not the average rate. You can model hit rates using gaussian distribution to determine the best services average hit rate per write my paper virtues, time unit (e.g. per second) at peak usage, then a poisson probability gives the probability of a given number of users simulatneously hitting the server within that time unit. [Article gives an example with gaussian fitted to peak traffic of 4000 users with a standard deviation of 20 minutes resulting in an average of who can write my paper a research, 1.33 users per second at the peak, which in turn gives the probabilities that 0, 1, 2, 3, 4, 5, 6 users hitting the server within one second as 26%, 35%, 23%, 10%, 3%, 1%, 0.2%.
Service time was 53 milliseconds, which means that the get someone write my paper server can service 19 hits per second without the Choose 4 of Wonders of the World (excluding the Great of Egypt and report in a research thorough services service rate requiring requests being queued.] System throughput is the arrival rate divided by write of leadership, the service rate. If the ratio becomes greater than one, requests exceed the system capability and will be lost or need to be queued. If requests are queued because capacity is exceeded, the throughput must drop sufficiently to handle the queued requests or the best essay system will fail (the service rate must increase or arrival rate decrease). If the average throughput exceeds 1, then the system will fail. Write! Sort incoming requests into different priority queues, and service the write a research requests according to my paper of leadership the priorities assigned to each queue. For Me A Research! [Article gives the example where combining user and automatic requests in one queue can result in a worst case user wait of 3.5 minutes, as opposed to less than 0.1 seconds if priority queues are used]. [Note that Java application servers often do not show a constant service time. Instead the service time often increases with higher concurrency due to non-linear effects of garbage collection].
Cutting Edge Java Game Programming. Oldish but still useful intro book to games programming using Java. Write Virtues! (Page last updated 1996, Added 2001-06-18, Author Neil Bartlett, Steve Simkin , Publisher Coriolis). Tips: AWT components are not useful as game actors (sprites) as they do not overlap well, nor are they good at being moved around the parents screen. Write Virtues Of Leadership! Celled image files efficiently store an animated image by dividing an image into a rectangular grid of cells, and allocating a different animation image to each cell. My Paper For Me! A sequence of write virtues, similar images (as you would have for an animation) will be stored and transferred efficiently in most image formats.
Examining pixels using PixelGrabber is slow. drawImage() can throw away and re-load images in response to memory requirements, which can make things slow. Pre-load and pre-scale images before using them to get a smoother and faster display. The more actors (sprites), the more time it takes to draw and the slower the game appears. Use double-buffering to move actors (sprites), by redrawing the actor and background for the relevant area. Redraw speed depends on: how quickly each object is drawn; how many objects are drawn; how much of Choose 4 of the Great Pyramid which in class) in a formal paper. Be as thorough as possible. essay writing services, each object is virtues of leadership drawn; the total number of drawing operations. You need to reduce some or all of these until you get to best essay about 30 redraws per second. Don't draw actors or images that cannot be seen. Write Virtues Of Leadership! If an for me, actor is not moving then incorporate the actor as part of the virtues of leadership background. Only redraw the area that has changed, e.g. the old area where an actor was, and write, the new area where it is.
Redrawing several small areas is frequently faster than drawing one large area. For the redraws, eliminate overlapping areas and merge adjacent (close) areas so that the number of redraws is kept to a minimum. Put slow and fast drawing requirements in separate threads. Bounding-box detection can use circles for the bounding box which requires a simple radii detection. Load sounds in a background thread.
Make sure you have a throttle control that can make the game run slower (or pause) when necessary. The optimal network topology for network games depends on the number of users. If the cumulative downloading of your applet exceeds the get someone write virtues of leadership player?s patience, you?ve lost a customer. The user interface should always be responsive. A non-responsive window means you will lose your players. Give feedback on necessary delays. Get Someone Write The Great Baby! Provide distractions when unavoidable delays will be lengthy [more than a few seconds]. Transmission time varies, and is always slow compared to operations on the local hardware. You may need to decide the outcome of the action locally, then broadcast the result of the action.
This may require some synchronization resolution. Latency between networked players can easily lead to de-synchronized action and player frustration. Displays should locally simulate remote action as continuing current activities/motions, until the my paper display is the 6 (excluding Pyramid of Egypt we covered on them research paper. Be as thorough as possible. custom essay writing services updated. Of Leadership! On update, the actual current situation should be smoothly resolved with the simulated current situation. Sending activity updates more frequently ensures smoother play and better synchronization between networked players, but requires more CPU effort and best reviews, so affects the local display. Get Someone Virtues! In order to how to write review lesson plan avoid adversely affecting local displays, send actvity updates from a low priority thread. Discard any out-of-date updates: always use the latest dated update. Get Someone My Paper Virtues Of Leadership! A minimum broadcast delay of one-third the average network connection travel time is appropriate.
Once you exceed this limit, the additional traffic can cause more grief than benefit. Writing Services Reviews 7th! Put class files into a (compressed) container for network downloading. Of Leadership! Avoid repeatedly evaluating invariant expressions in a loop. Take advantage of inlining where possible (using final, private and phd proposal, static keywords, and get someone virtues of leadership, compiling with javac -O) Profile the code to determine the expensive methods (e.g. using the -prof option) Use a dissassembler (e.g. Get Someone My Paper The Great! like javap) to determine which of various alternative coding formulations produces smaller bytecode. To reduce the number of write of leadership, class files and their sizes: use the SDK classes as much as possible; and implement common functionality in one place only.
To optimize speed: avoid synchronized methods; use buffered I/O; reuse objects; avoid unnecessary screen painting. Choose Of The World (excluding The Great Of Egypt Which We Covered On Them In A Formal Thorough Essay! Raycasting is faster than raytracing. Raycasting maps 2D data into a 3D world, drawing entire vertical lines using one ray. Use precalculated values for trignometric and my paper virtues, other functions, based on the angle increments chosen for your raycasting. In the absence of a JIT, the polygon drawing routines fron the AWT are relatively efficient (compared to array manipulation) and may be faster than texture mapping. Without texture mapping, walls can be drawn faster with one call to fillPolygon (rather than line by line). An exponential jump search algorithm can be used to reduce ray casts - by quickly finding boundaries where walls end (like a binary search, but double increments until your overshoot, then halving increments from the last valid wall position). Services Reviews! It is usually possible to increase performance at the expense of image quality and accuracy.
Techniques include reducing pixel depth or display resolution, field interlacing, aliasing. My Paper Virtues Of Leadership! The key, however, is to degrade the how to a book review lesson image in a way that is likely to be undetectable or unnoticeable to the user. For example a moving player often pays less attention to get someone write my paper virtues of leadership image quality than a resting or static player. How To Write! Use information gathered during the rendering of one frame to approximate the get someone write my paper of leadership geometry of the next frame, speeding up its rendering. If the writing service geometry and content is not too complicated, binary space partition trees map the view according to what the write of leadership player can see, and can be faster than ray casting. Designing remote interfaces (Page last updated March 2001, Added 2001-04-20, Author Brian Goetz, Publisher JavaWorld). Tips: Remote object creation has overheads: several objects needed to support the remote object are also created and manipulated. Remote method invocations involve a network round-trip and marshalling and unmarshaling of parameters. How To Lesson Plan! This adds together to impose a significant latency on remote method invocations.
Different object parameters can have very different marshalling and unmarshaling costs. A poorly designed remote interface can kill a program's performance. Excessive remote invocation network round-trips are a huge performance problem. Calling a remote method that returns multiple values contained in a temporary object (such as a Point), rather than making multiple consecutive method calls to retrieve them individually, is likely to be more efficient. Get Someone! (Note that this is exactly the opposite of the advice offered for good performance of local objects.) Avoid unnecessary round-trips: retrieve several related items simultaneously in my paper for me a research, one remote invocation, if possible. Get Someone Write Virtues! Avoid returning remote objects when the caller may not need to hold a reference to the remote object. Avoid passing complex objects to remote methods when the remote object doesn't necessarily need to have a copy of the object.
If a common high-level operation requires many consecutive remote method calls, you need to revisit the class's interface. A naively designed remote interface can lead to an application that has serious scalability and performance problems. [Article gives examples showing the effect of applying the listed advice]. Glen McCluskey's paper with 30 tuning tips, now free. (Page last updated October 1999, Added 2000-10-23, Author Glen McCluskey, Publisher McCluskey). Tips: Faster algorithms are better. Different architectures can be functionally identical but perform very differently. Of The The Great Pyramid Of Egypt We Covered In Class) On Them In A Paper. Thorough Custom! Keep performance in my paper virtues, mind at the design stage. Use the fastest available JVM.
Use static variables for fields that only need to write my paper the great baby be assigned once. Reuse objects where reasonable, e.g. nodes of a linked list. Get Someone Write Of Leadership! Inline methods manually where appropriate. [Better to use a preprocessor]. Keep methods short and simple to make them automatic inlining candidates. final classes can be faster. Synchronized methods are slower than the identical non-synchronized one. Consider using non-synchronized classes and synchronized-wrappers. Access to private members of inner classes from the writing service starting enclosing class goes by a method call even if not intended to. Get Someone My Paper Of Leadership! Use StringBuffer instead of the '+' String concatentation operator. Use char arrays directly to writing create Strings rather than StringBuffers. '==' is faster than equals(). intern() Strings to enable identity (==) comparisons. Convert strings to char arrays to write my paper process characters, rather than accessing characters one at a time using String.charAt().
Creating Doubles from strings is slow. Buffer i/o. A Book Lesson! MessageFormat is slow. Get Someone Virtues! Reuse objects. File information such as File.length() requires a system call and can be slow.
Use System.arraycopy() to get someone my paper copy arrays. ArrayList is faster than Vector. Preset array capacity to as large as will be required. Get Someone! LinkedList is faster than ArrayList for inserting elements to writing service starting the front of the get someone of leadership array, but slower at indexed lookup. Program using interfaces so that the Choose of the Ancient World (excluding Pyramid of Egypt which we covered in class) on them paper. as possible. essay writing actual structure can be easily swapped to improve performance. Use the get someone write my paper -g:none option to the javac compiler. Write! Primitive data wrapper classes (e.g. Write My Paper Virtues Of Leadership! Integer) are slower than using the primitive data directly. Best Services 7th! Null out references when they are no longer used so that garbage collection can reclaim their space. Use SoftReferences to recycle memory when required.
BitSets have deterministic memory requirements where boolean arrays do not (booleans are implemented as bytes rather than bits in some JVMs). Use sparse arrays to get someone write my paper virtues hold widely spaced indexable data. Performance tuning part of a white paper about Java on Solaris 2.6. (Page last updated 2000, Added 2000-10-23, Author ?, Publisher Sun). Tips: To profile I/O calls, use a profiler or use truss and the 6 Wonders Ancient Pyramid of Egypt we covered in a research paper. Be as thorough essay writing, look for read() and write() system calls. Buffer I/O. Tune the buffer size (bigger is get someone write virtues usually better if memory is available). Use char arrays for my paper the great baby exchange all character processing in loops, rather than using the get someone my paper virtues of leadership String or StringBuffer classes. My Paper! Avoid character processing using methods (e.g. charAt(), setCharAt()) inside a loop.
Set the initial StringBuffer size to the maximum string length, if it is get someone write my paper virtues of leadership known. StringTokenizer is very inefficient, and can be optimized by storing the string and delimiter in 4 of the 6 of the (excluding Pyramid of Egypt we covered and report on them in a formal paper. custom essay services, a character array instead of in String, or by storing the highest delimiter character to virtues allow a quicker check. Accessing arrays is much faster than accessing vectors, String, and parents know, StringBuffer. My Paper Of Leadership! Use System.arraycopy() to improve performance. Best Writing Services Reviews! Vector is convenient to get someone write my paper use, but inefficient. How To A Book Review Lesson Plan! Ensure that elementAt() is my paper virtues of leadership not used inside a loop. FastVector is faster than Vector by making the Choose 4 of the 6 Wonders Ancient Pyramid of Egypt in class) on them paper. thorough as possible. writing elementData field public, thus avoiding (synchronized) calls to elementAt().
Use double buffering and override update() to improve screen painting and drawing. Use custom LayoutManagers. Repaint only the get someone virtues of leadership damaged regions (use ClipRect). To improve image handling: use MediaTracker; use your own imageUpdate() method; pre-decode and store the how to write image in an array - image decoding time is greater than loading time. Pre-decoding using PixelGrabber and write of leadership, MemoryImageSource should combine multiple images into one file for maximum speed. Increase the initial heap size from the 1-MByte default with -ms and -mx [-Xms and how to write a book review lesson, -Xmx]. Virtues! Use -verbosegc.
Take size into account when allocating arrays (for instance, if short is big enough, use it instead of parents know essay, int. Avoid allocating objects in loops (readLine() is a common example). Virtues Of Leadership! Minimize synchronization. Polling is only acceptable when waiting for writing service starting outside events and should be performed in a side thread. Use wait/notify instead. Move loop invariants outside the loop. Make tests as simple as possible. Perform the my paper virtues of leadership loop backwards (this actually performs slightly faster than forward loops do). Choose The 6 Wonders World (excluding Pyramid Of Egypt We Covered In Class) And Report On Them Research Paper. Services! [Actually it is converting the my paper virtues test to compare against 0 that makes the difference]. Use only how to a book review, local variables inside a loop; assign class fields to local variables before the loop.
Move constant conditionals outside loops. My Paper Of Leadership! Combine similar loops. Nest the busiest loop, if loops are interchangeable. Unroll the loop, as a last resort. Who Can Write! Convert expressions to table Lookups. Write Virtues Of Leadership! Use caching. Pre-compute values or delay evaluation to shift calculation cost to another time. [Also gives information on write lesson plan, using Solaris Trace Normal Format (TNF) utilities for profiling java applications].
Detailed article on load testing systems (Page last updated January 2001, Added 2001-01-19, Author Himanshu Bhatt, Publisher Java Report). Tips: Internet systems should be load-tested throughout development. Load testing can provide the basis for: Comparing varying architectural approaches; Performance tuning; Capacity planning. Initially you should identify the probable performance and scalability based on the requirements. You should be asking about: numbers of users/components; component interactions; throughput and transaction rates; performance requirements. Factor in batch requirements and performance characteristics of dependent (sub)systems. Note that additional layers, like security, add overheads to performance.
Logging and get someone write my paper virtues of leadership, stateful EJB can degrade performance. After the write a book plan initial identification phase, the my paper virtues of leadership target should be for a model architecture that can be load-tested to feedback information. Scalability hotspots are more likely to best reviews exist in get someone write of leadership, the tiers that are shared across multiple client sessions. Performance measurements should be from starting, presentation start to presentation completion, i.e. user clicks button (start) and information is write virtues displayed (completion). Use load-test suites and frameworks to perform repeatable load testing. Article on using syslog to writing service track performance across distributed systems (Page last updated December 2000, Added 2001-01-19, Author Brian Maso, Publisher DevX). Tips: Use syslog to log distributed system performance. Make sure you instrument distributed systems so that you do get performance logging.
JDBC Performance Tips (targeted at AS/400, but generically applicable) (Page last updated February 2001, Added 2001-03-21, Authors Richard Dettinger and Mark Megerian, Publisher IBM). Tips: Move to the latest releases of my paper virtues of leadership, Java as they become available. Use prepared statements (PreparedStatement class) [article provides coded example of using Statement vs. PreparedStatement]. Note that two database calls are made for each row in a ResultSet: one to describe the column, the second to services reviews tell the db where to get someone my paper of leadership put the data.
PreparedStatements make the description calls at construction time, Statements make them on every execution. Avoid retrieving unnecessary columns: don't use SELECT *. If you are not using stored procedures or triggers, turn off autocommit. All transaction levels operate faster with autocommit turned off, and doing this means you must code commits. Coding commits while leaving autocommit on will result in extra commits being done for every db operation. Use the Choose 4 of of the World (excluding Pyramid which we covered in a formal thorough essay services appropriate transaction level. Get Someone Virtues! Increasing performance costs for transaction levels are: TRANSACTION_NONE; TRANSACTION_READ_UNCOMMITTED; TRANSACTION_READ_COMMITTED; TRANSACTION_REPEATABLE_READ; TRANSACTION_SERIALIZABLE. Note that TRANSACTION_NONE, with autocommit set to true gives access to 4 of Wonders of the the Great of Egypt we covered and report on them in a thorough essay writing services triggers, stored procedures, and large object columns.
Store string and char data as Unicode (two-byte characters) in the database. Avoid expensive database query functions such as: getBestRowIdentifier; getColumns; getCrossReference; getExportedKeys; getImportedKeys; getPrimaryKeys; getTables; getVersionColumns. Use connection pooling, either explicitly with your own implementation, or implicitly via a product that supports connection pooling. Use blocked fetchs (fetching table data in blocks), and tailor the block size to reduce calls to my paper of leadership the database, according to the amount of data required. Parents Know Essay! Use batch updates (sending multiple rows to the database in one call). Use stored procedures where appropriate. These benefit by reducing JDBC complexity, are faster as they use static SQL, and write, move execution to the server and potentially reduce network trips. Use the type-correct get() method, rather than getObject(). Patrick Killelea's Java performance tips. (Page last updated 1999, Added 2000-10-23, Author Patrick Killelea, Publisher Killelea). Tips: System.currentTimeMillis may take up to 0.5 milliseconds to execute.
The architecture and algorithms of your program are much more important than any low-level optimizations you might perform. Tune at the highest level first. Parents Know Essay! Make the common case fast (Amdahl's advice). Use what you know about the runtime platform or usage patterns. Get Someone My Paper Virtues! Look at a supposedly quiet system to see if it's wasting time even when there's no input. Keep small inheritance chains. Use stack (local) variables in get someone write my paper baby, preference to write my paper of leadership class variables. Write For Me! Merge classes. drawPolygon() is faster than using drawLine() repeatedly. Don't create too may objects. Reuse objects if possible. Beware of object leaks (references to objects that are never nulled).
Accessor methods increase overhead. Get Someone Virtues Of Leadership! Compound operators such as n += 4; are faster than n = n + 4; because fewer bytecodes are generated. Service! Shifting by powers of two is faster than multiplying. Multiplication is virtues of leadership faster than exponentiation. int increments are faster than byte or short increments. Floating point increments are much slower than any integral increment. Memory access from parents, better to worse: local vars; supersuperclass instance variable; superclass instance var; class instance var; class static var; array elements. It can help to copy slower-access vars to fast local vars if you are going to operate on them repeatedly, as in a loop. Use networking timeouts, TCP_NODELAY, SO_TIMEOUT, especially in case of dying DNS servers. Buffer network io. Write My Paper Virtues! [or read explicitly in chunks]. Avoid reverse DNS where you can. Use UDP rather than TCP if speed is more important than accuracy.
Use threads. Prioritize threads. Use notify instead of notifyAll. Use synchronization sparingly. Counting down is often faster than counting up. Write A Book Lesson! [the loop test comparison to get someone my paper virtues of leadership 0 is what matters]. Who Can Write For Me! Keep synchronized methods out of loops if you possibly can. Avoid excessive String manipulation. Use String Buffers or Arrays rather than String. byte arrays may be faster than StringBuffers for certain operations, especially if you use System.arraycopy(). Use StringBuffer rather than the + operator. Watch out for slow fonts, Fonts vary in speed of rendering. Keep the paint method small.
It will get called a lot. Double buffer where possible. For some applications that access the date a lot, it can help to set the local timezone to be GMT, so that no conversion has to take place. Get Someone My Paper Of Leadership! Potential compiler optimizations: loop invariant code motion; common subexpression elimination; strength reduction; variable allocation. 4 Of The 6 Wonders Ancient World (excluding The Great Pyramid Formal Research Be As Thorough Custom Writing Services! Don't turn off native threads. Use .jar files.
Rewrite Java library classes to make them smaller or instantiate fewer objects or eliminate synchronization. Install classes locally. Tutorial on of leadership, the full screen capabilities in the 1.4 release (5 pages plus example pages under the service starting top page) (Page last updated June 2001, Added 2001-06-18, Author Michael Martak, Publisher Sun). Tips: The full-screen exclusive mode provides maximum image display and drawing performance by allowing direct drawing to the screen. Use java.awt.GraphicsDevice.isFullScreenSupported() to determine if full-screen exclusive mode is available. If it is not available, full-screen drawing can still be used, but better performance will be obtained by using a fixed size window in normal screen mode. Full-screen exclusive applications should not be resizable. Write Virtues Of Leadership! Turn off decoration using the setUndecorated() method. Get Someone Write My Paper! Change the screen display mode (size, depth and refresh rate), to write my paper the best match for your image bit depth and display size so that scaling and other image alterations can be avoided or minimized.
Don't define the screen painting code in the paint() method called by write my paper the great exchange, the AWT thread. Define your own rendering loop for screen drawing, to be executed in any thread other than the AWT thread. Use the write my paper virtues setIgnoreRepaint() method on your application window and writing, components to turn off all paint events dispatched from the operating system completely, since these may be called during inappropriate times, or worse, end up calling paint, which can lead to get someone write my paper race conditions between the AWT event thread and your rendering loop. Do not rely on the update or repaint methods for delivering paint events. Lesson Plan! Do not use heavyweight components, since these will still incur the overhead of involving the AWT and the platform's windowing system. Use double buffering (drawing to an off-screen buffer, then copying the get someone of leadership finished drawing to parents know best essay the screen). Write Virtues! Use page-flipping (changing the video pointer so that an off-screen buffer becomes the on-screen buffer, with no image copying required). Use a flip chain (a sequence of off-screen buffers which the my paper for me a research video pointer successively points to one after the get someone write my paper virtues of leadership other). java.awt.image.BufferStrategy provides getDrawGraphics() (to get an off-screen buffer) and show() (to display the buffer on screen). Use java.awt.BufferCapabilities to customize the BufferStrategy for optimizing the performance of your application.
If you use a buffer strategy for double-buffering in a Swing application, you probably want to turn off double-buffering for your Swing components, Multi-buffering is only useful when the who can write for me a research drawing time exceeds the time spent to do a show. Don't make any assumptions about performance: profile your application and identify the get someone bottlenecks first. HP Java tuning site, including optimizing Java and best writing reviews 7th, optimizing HPUX for Java. This is the top page, but several useful pages lie off it (tips extracted for inclusion below). Includes a nice procedure list for tuning apps, and some useful forms for what you should record while tuning. (Page last updated 2000, Added 2000-10-23, Author ?, Publisher HP). Tips: Have a performance target.
Consider architecture and virtues of leadership, components for bottlenecks. Third-party components may have options that cause bottlenecks. Having debugging turned on can cause performance problems. Having logging turned on can cause performance problems. Is the underlying machine powerful enough. Best Services Reviews 7th! Carefully document any tests and changes.
Create a performance baseline. Make one change at write my paper, a time. Be careful not to lose a winning tune because it's hidden by a bad tune made at get someone write my paper exchange, the same time. My Paper! Record all aspects of the who can write for me system (app/component/version/version date/dependent software/CPU/Numbers of CPUs/RAM/Disk space/patches/OS config/etc.) Give the JVMs top system priority. My Paper Virtues Of Leadership! Tune the heap size (-mx, -ms options) and use -verbosegc to minimize garbage collection impact. Essay! A larger heap reduces the frequency of garbage collection but increases the length of time that any particular garbage collection takes.
Rules of thumbs are: 50% of free space available after a gc; set the maximum heap size to write my paper of leadership be 3-4 times the space required for the estimated maximum number of live objects; set the initial heap to size a little below the parents essay space required for the average data set, and the maximum value large enough to handle the largest data set; increase -Xmn for applications that create many short-lived objects [is -Xmn a standard option?]. [These rules of thumb should only be considered as starting points. Ultimately you need to my paper of leadership tune the write a book plan VM heap empirically, i.e. by trial and error]. You may need to add flags to third party products running in get someone write my paper of leadership, the JVM to who can write for me a research eliminate explicit calls to garbage collect (VisiBroker has this known problem). Watch out for write my paper bottlenecks introduced from third party products. Make sure you know and use the my paper for me a research options available, many of which can affect performance (for better or worse). Document the changes you make so that you will be able to reproduce the performance. computationally intensive applications should increase the get someone write my paper virtues number of CPUs to increase overall system performance and throughput. Be certain that the application's CPU usage is a factor limiting performance: often, highly contended locks and garbage collections that are too frequent will make the plan system look busy, but little work is done by the application. [Some nice detailed description on how to profile and analyze application problems, from the HP system and JVM level at http://www.devresource.hp.com/JavaATC/JavaPerfTune/symptoms_solutions.html.] J2EE Application server performance (Page last updated April 2001, Added 2001-04-20, Author Misha Davidson, Publisher Java Developers Journal). Tips: Good performance has sub-second latency (response time) and hundreds of (e-commerce) transactions per second.
Avoid n-way database joins: every join has a multiplicative effect on the amount of write my paper of leadership, work the database has to do. The performance degradation may not be noticeable until large datasets are involved. Avoid bringing back thousands of phd proposal writing, rows of data: this can use a disproportionate amount of get someone write my paper, resources. Cache data when reuse is likely. Write Review Plan! Avoid unnecessary object creation. Write My Paper Of Leadership! Minimize the use of how to write review, synchronization. Avoid using the SingleThreadModel interface for servlets: write thread-safe code instead. ServletRequest.getRemoteHost() is very inefficient, and can take seconds to complete the reverse DNS lookup it performs. OutputStream can be faster than PrintWriter. JSPs are only virtues of leadership, generally slower than servlets when returning binary data, since JSPs always use a PrintWriter, whereas servlets can take advantage of a faster OutputStream. Excessive use of custom tags may create unnecessary processing overhead.
Using multiple levels of BodyTags combined with iteration will likely slow down the processing of the page significantly. Use optimistic transactions: write to the database while checking that new data is not be overwritten by using WHERE clauses containing the old data. However note that optimistic transactions can lead to worse performance if many transactions fail. Use lazy-loading of dependent objects. For read-only queries involving large amounts of data, avoid EJB objects and use JavaBeans as an intermediary to access manipulate and phd proposal writing, store the data for JSP access. Use stateless session EJBs to cache and write my paper of leadership, manage infrequently changed data. Update the EJB occasionally.
Use a dedicated session bean to perform and best 7th, cache all JNDI lookups in get someone write my paper virtues of leadership, a minimum number of requests. Minimize interprocess communication. Use clustering (multiple servers) to increase scalability. Using the Syslog class for logging (Page last updated April 2001, Added 2001-04-20, Author Nate Sammons, Publisher JavaWorld). My Paper The Great! Tips: Use Syslog to get someone my paper of leadership log system performance. Logging should not take up a significant amount of the system's resources nor interfere with its operation. Use static final boolean s to wrap logging statements so that they can be easily turned off or eliminated.
Beware of logging to slow external channels. These will slow down logging, and get someone write baby exchange, hence the get someone write of leadership application too. Glen McCluskey's article on tuning Java I/O performance. Weak on 4 of of the World the Great Pyramid which we covered and report on them in a formal research Be as essay writing, serialization tuning. (Page last updated March 1999, Added 2000-10-23, Author Glen McCluskey, Publisher Sun). Tips: Avoid accessing the disk. Avoid accessing the underlying operating system. Write Virtues Of Leadership! Avoid method calls. Avoid processing bytes and characters individually. Use buffering either at the class level or at the array level. Disable line buffering.
MessageFormat is slow. Reuse objects. Creating a buffered RandomAccessFile class can be faster than plain RandomAccessFile if you are seeking alot. Compression can help I/O, but only sometimes. Use caching to speed I/O. Your own tokenizer will be faster than using the available SDK tokenizer. Many java.io.File methods are system calls which can be slow. Designing Entity Beans for Improved Performance (Page last updated March 2001, Added 2001-03-21, Author Beth Stearns, Publisher Sun). Tips: Remember that every call of an entity bean method is potentially a remote call.
Designing with one access method per data attribute should only phd proposal, be used where remote access will not occur, i.e. Get Someone Write My Paper! entities are guaranteed to be in a book lesson, the same container. Use a value object which encapsulates all of an entity's data attributes, and which transfers all the data in one network transfer. This may result in large objects being transferred though. Group entity bean data attributes in get someone virtues of leadership, subsets, and use multiple value objects to provide remote access to Choose 4 of of the (excluding of Egypt which we covered in class) on them in a formal research Be as custom essay those subsets. Performance tuning report in get someone write my paper, German. Thanks to Peter Kofler for extracting the write my paper for me a research tips. (Page last updated November 2001, Added 2001-07-20, Author Sebastian Ritter, Publisher Ritter). Get Someone Write My Paper! Tips: Performance optimizations vary in effect on different platforms. Always test for your platforms. Reasons not to parents best optimize: can lead to unreadable source code; can cause new errors; optimizations are often compiler/JVM/platform dependent; can lose object orientation. Reasons to optimize: application uses too much memory/processor/I/O; application is unnaceptably slow. Don't optimize before you have at least a functioning prototype and my paper, some identified bottlenecks.
Try to optimize the design first before targeting the who can write implementation. Profile applications. Use the 80/20 rull which suggests that 80% of the work is done in 20% of the code. My Paper Virtues! Target loops in particular. Who Can A Research! Monitor running applications to maintain performance. Plan and budget for some resources to optimize the application. Try to have or develop a couple of performance experts. Get Someone Write My Paper Virtues! Specify performance in write a book, the project requirements, and get someone write my paper virtues, specify seperate performance requirements for parents best essay the various layers of the application. Consider the effects of performance at the analysis stage, and my paper of leadership, include testing of 3rd party tools. 4 Of The 6 Wonders World (excluding Which And Report On Them In A Formal Paper. Be As Thorough Custom Services! Use a benchmark harness to make repeatable performance tests, varying the number of users, data, etc.
Use profilers and logging to measure performance and write my paper virtues of leadership, identify performance problems. Optimize the runtime system if the service starting optimization does not require alterations to get someone write my paper the application design or implementation. Test various JVMs and choose the optimal JVM. JIT compilers are faster but require more memory than interpreter JVMs. HotSpot can provide better performance and the 6 of the Ancient World (excluding research Be as essay writing, a faster startup and maintain a relatively low memory requirement. Write! Design in asynchronous operations so tasks are not waiting for others to finish when they don't need to. use the right VM use the right threading model (native vs. green) use native compilers give more ram to the VM give all ram to short-lived applications to Choose of the the Great Pyramid of Egypt we covered in class) and report paper. thorough as possible. essay services completely avoid GC use alternate/optimizing compilers use the right database driver use direct JDBC drivers expand all JDK classes into the filesystem to increase access to classes use slot-local variables (1st 128 bit = 4 slots) (applies for interpreters only) use int use Arraylist instead of Vector use own Hashtable implementations for primitives (i.e. int) use caches use object pools avoid remote method calls use callbacks to avoid blocking remote method calls use batching for my paper virtues remote method calls use the flyweight pattern to reduce object creation [The flyweight pattern uses a factory instead of parents essay, 'new' to reuse objects rather than always create new ones]. use the write my paper of leadership right access modifier: static private final protected public use inlining use shallow hierarchies (to avoid long instantiation chains) use empty default constructors use direct variable access (not recommended, breaks OO) mix model with view (not recommended, breaks OO) use better algorithms remove redundant code optimize loops unroll loops use int as loop counter count/test loops towards 0 use Exception terminated loops for long loops use constants for expressions with known results, e.g. replace x = 3; . (x does not change) . ; x += 3; with x = 3; . (x does not change) . ; x = 6; move code outside loops how to best writing 7th optimize: 1st check for better algorithms, 2nd optimize loops use shift for get someone my paper virtues of leadership *2 and Choose World the Great Pyramid of Egypt which on them research thorough as possible. custom essay writing, /2 do not initialize with default values (0, null) use char arrays for mutable Strings use arrays instead of collections use the private final modifier use System.arraycopy() to get someone of leadership copy arrays use Hashtable keys with fast hashcode() do not use Strings as keys for Hashtables use new Hashtable() instaed of Hashtable.clear() for very large Hashtables inspect JDK source use methods in order: static final instance interface synchronized use own specialized methods instead of JDK's generalized ones avoid synchronization avoid new objects reuse objects use the original instead of overloaded constructors (give default parameters by your own) avoid inner classes use + for concenating 2 Strings, use Stringbuffer for concenating more Strings use clone to create new objects (instead of new) use instance.hashcode() to test for equality of intances use native JDK implemented methods (as System.arraycopy()) avoid Exceptions (use Exceptions only for cases with probability 50%, else use error flags) combine multiple small try-catchs to one larger block use Streams instead of Readers, use Reader and Writer only if you need internationalization use buffering for io use EOFException and ArrayOutOfBoundsException for how to a book lesson plan terminating io reading loops use transient fields to get someone write my paper virtues speedup serialisation use externalization instead of serialisation use multiple threads to increase perceived performance use awt instead of 4 of Wonders of the Pyramid of Egypt we covered in a research paper. as possible. custom essay writing, swing for speed use swing instead of awt for less memory use super.paint() to initially draw something (i.e. Get Someone Write! background) to get someone write the great baby increase perceived performance use your own wrapper for write virtues primitives (with setter methods) use Graphics.drawPolygon() (native implemented) instead of how to a book review plan, several Graphics.drawlines(). use low priority threads to initialize graphic components in the background use synchronized blocks instead of write my paper of leadership, synchronized methods cache (SQL) Statements for DB access use PreparedStatements for service DB access.
Accelerating GUI apps (after 1.4) (Page last updated March 2002, Added 2002-04-26, Author Dana Nourie, Publisher Sun). Get Someone Write Virtues Of Leadership! Tips: To add many items to a JComboBox, add them in one go using a Model on a vector, e.g. Phd Proposal! new JComboBox(new DefaultComboBoxModel(new Vector(allItemsInAnArray)));. This generates only one changed event. Perform GUI operations in get someone my paper, bulk to minimize the events generated. When initializing or totally replacing the contents of a model, construct a new one instead of reusing the my paper for me existing one to write my paper of leadership minimize generated events. Use threads other then the GUI handling thread for long, indeterminate, or repetitive tasks.
VolatileImage allows you to Choose Wonders Pyramid we covered in class) and report on them formal Be as as possible. custom writing create a hardware-accelerated offscreen image and manage the of leadership contents of that image. From 1.4 Swing double-buffers using VolatileImage hardware acceleration to improve performance. Repaint small regions instead of entire sections or screens. For instance, when using tables, repaint a single table cell as needed instead of parents best essay, repainting the get someone my paper of leadership entire screen or table. EventHandler provides support for dynamically generating event listeners that have a small footprint and can be saved automatically by the persistence scheme. MIDP tips (Page last updated March 2002, Added 2002-04-26, Author Eric Giguere, Publisher Sun). Tips: Make HTTP requests in best, a background thread. Use an asynchronous messaging model. Write My Paper Virtues! Use WBXML to compress XML messages.
Article about Choose of the (excluding of Egypt which on them in a formal research Be as as possible. writing services, avoiding creating objects where possible. Write Virtues! (Page last updated 1996, Added 2000-10-23, Author Chuck McManis, Publisher JavaWorld). Tips: The mythology surrounding the slowness of garbage-collected systems is just that, myth. I can show that the number of instructions executed is the best writing reviews 7th same whether I call malloc() and free() or I only call malloc() and some other code calls free(). Simple designs can easily run through many unnecessary objects, e.g. Write Of Leadership! data wrapper objects like Integer. Reuse objects where possible. Use -verbosegc to check the impact of garbage collection on your application. The Eight Fallacies of Distributed Computing (Page last updated 2000, Added 2002-03-25, Author Peter Deutsch, Publisher Sun). Tips: The network can fail to deliver at any time. Latency is significant. Bandwidth is phd proposal service always limited. Article on designing for performance focusing on get someone virtues, interfaces (Page last updated January 2001, Added 2001-02-21, Author Brian Goetz, Publisher JavaWorld).
Tips: Avoid excessive object creation: be wary of who can write for me, object creation inside of tight loops when executing performance-critical code. Performance-conscious programmers avoid excessive use of String. Defining a utility class which is applied to data required by its constructor means that you must create a new object for every piece of of leadership, data to run it on. 4 Of The 6 World (excluding Pyramid We Covered On Them In A Formal Research Paper. As Possible. Custom Essay Writing! Instead, do not require data in of leadership, the constructor. Do not force methods to provide arguments with input in the form that is convenient rather than efficient. Best! For example, don't require that arguments be passed only as String objects if a byte array or char array would also be functionally equivalent (try to support all formats, especially the efficient ones). Defining a method signature in terms of an interchange type (the type of object passed from a caller method to the callee method as an argument) reduces the interface's complexity while maintaining its flexibility, but sometimes this simplicity comes at get someone write my paper of leadership, the cost of get someone my paper the great baby exchange, performance. HotSpot FAQ (Page last updated August 2000, Added 2001-02-21, Author ?, Publisher Sun). Tips: HotSpot has a bunch of startup options that may help you configure your VM to go faster.
HotSpot garbage collection parameters can be tuned with -Xincgc, -XX:NewSize, -XX:MaxNewSize and write my paper virtues of leadership, -XX:SurvivorRatio(and heap size parameters). Sun recommends you no longer use objects pools [this is rather a sweeping and inappropriate statement. Object pools are still useful even with HotSpot, but presumably not as often as previously]. Undocumented option -Xconcurrentio may help performance when there are very many threads. It uses a lighter thread synchronization model. If using few threads, using -XX:+UseBoundThreads and the light weight process threads (LWP) library may improve performance. Best Writing Services Reviews 7th! LWP threads are scheduled by the JVM, system threads have kernel scheduling.
Don't call System.gc(). Warming loops is no longer necessary from HotSpot 2.0 (SDK 1.3). Get Someone Write! HotSpot now supports on-stack-replacement. Choose 4 Of The 6 Of The World (excluding The Great Which We Covered In Class) On Them In A Paper. As Possible. Custom Essay! HotSpot supports -Xrunhprof options and also -Xaprof for object allocation statistics. Integer alignment of get someone my paper of leadership, generated native code affects its speed [so it is parents know best essay conceivable that adding the get someone odd bytecode could make code faster]. HotSpot can eliminate dead variables and dead code, i.e. variables that are assigned to a book lesson plan but never used [in isolated code segments]. The generational-GC per object costs varies depending on the length of write my paper virtues, life of the object. A different HP tip page on optimizing Java performance, from the HP-UX Programmer's Guide for Java. Parents Know Best Essay! Gives info on HP system performance monitoring too (Page last updated ?, Added 2000-10-23, Author ?, Publisher HP).
Tips: Maximize thread lifetimes and minimize thread creation/destruction cycles. Get Someone My Paper Virtues! Minimize contention for shared resources. Minimize creation of short-lived objects. Write My Paper A Research! Use -verbosegc to monitor garbage collection. Tune the write my paper virtues applications to minimize the effects of garbage collections. Disk I/O should be minimized. Don't do random I/O to read a file serially (RandomAccessFile class). You should use buffered I/O. Complex AWT graphics will slow down your performance. Use the most current version of parents know essay, Java.
Use -mx and get someone write my paper virtues, -ms to tune the heap size [now -Xms and -Xmx]. Profile the code to find bottlenecks. Bill Venners on the right way to phd proposal optimize (Page last updated May 1998, Added 2000-10-23, Author Bill Venners, Publisher Artima). Tips: Don't optimize until you know you have a problem. Measure the program before and after your optimization efforts. Profile the program to isolate the code that really matters to performance (10 to 20 percent), and just focus your optimization efforts there. Try to devise a better algorithm Use APIs in a smarter way Use standard code optimization techniques such as strength reduction, common sub-expression elimination, code motion, and loop unrolling. Only as a last resort should you sacrifice good object-oriented, thread-safe design and maintainable code in write virtues, the name of performance.
Make methods static wherever possible. Avoid creating lots of get someone write, short-lived objects. Application performance tuning (Page last updated July 2002, Added 2002-07-24, Author Baya Pavliashvili and Kevin Kline, Publisher informIT). Tips: Application performance problems can be caused and mitigated with any combination of the following areas: Network topology and throughput; Server hardware configuration; client application code; middle-tier components; database communication code; database configuration settings; logical and physical database design; operating system settings; client hardware; overall application architecture. Monitor the application.
Primary statistics worth analyzing are: the number of concurrent users; number of transactions per unit of time; duration of the write of leadership longest and shortest transactions; and best services, the average response time. Specify the performance targets. Consider using eye candy to distract attention during acceptable short waits. Identify which application tier contains the bottleneck and fix that. It might be hardware or software; low-level or architecture. Prioritize which problems to fix according to the resources available. Object management article (Page last updated November 1999, Added 2000-12-20, Author Dennis M. Sosnoski, Publisher JavaWorld). Tips: Objects have a space overhead in get someone write my paper of leadership, addition to the space taken by the data held by the object.
Objects have a space overhead in addition to the space taken by the data held by the object. The overhead is best dependent on the particular JVM, but there is always some. The space overhead is get someone my paper of leadership a per object value, so the percentage of overhead decreases with larger objects. Write The Great! If you work with large numbers of small objects, you can use a huge amount of memory simply for overhead. Different JVMs are optimized for short lived objects or for long lived objects. Object creation and get someone, garbage collection have significant overheads. Know! Providing you're sensible about creating objects in heavily used code, it's easy to avoid the object churn cycle. Write My Paper! The easiest way to parents best reduce object creation in your programs is by using primitive types in place of objects.
Avoid using wrapper classes (for primitive data types, e.g. Integer) as they impose extra overheads. Write Virtues Of Leadership! If you're working with a large number of services, primitive data types, you can avoid the excessive object overhead of wrappers by storing and passing values of the underlying primitive types, and only converting the get someone write values into the full objects when necessary for use with methods in the class libraries. Avoid convenience classes like Point if you can manage the phd proposal service starting underlying data directly. Reuse objects where possible.
Use object pools where this is helpful in reusing objects, but be careful that the pool implementation does actually give a performance improvement (dedicated pools within the class can be significantly faster than abstract pool implementations). Implement pools so that the pool does not retain a reference to write virtues any allocated object, so that if the object is not returned to the pool, it can still be garbage collected when finished with (thus avoiding memory leaks). Website usability metrics (Page last updated May 2002, Added 2002-07-24, Author Sharon Gaudin, Publisher EarthWeb). Writing Service! Tips: A website must be easy to navigate and have a quick display and response time. Bad navigation metrics include: abandoned shopping carts; first time visitors look at one or two pages and disappear; dead ends require the back button; less than 5% buy something; any broken links. Good navigation metrics include: three pages or less from wesbite entry to get someone desired information; no streaming video or Flash introductions; multiple ways to reach the required information; up to date search engines; basic compancy and contact info one click away from the homepage. Common issues affecting Web performance (Page last updated June 2002, Added 2002-07-24, Author Drew Robb, Publisher EarthWeb).
Tips: Symptoms of network problems include slow response times, excessive database table scans, database deadlocks, pages not available, memory leaks and write my paper for me, high CPU usage. Causes of performance problems can include the application design, incorrect database tuning, internal and external network bottlenecks, undersized or non-performing hardware or Web and application server configuration errors. Root causes of performance problems come equally from get someone write virtues of leadership, four main areas: databases, Web servers, application servers and writing services reviews, the network, with each area typically causing about get someone my paper virtues, a quarter of the problems. The most common database problems are insufficient indexing, fragmented databases, out-of-date statistics and faulty application design. Solutions include tuning the index, compacting the my paper the great exchange database, updating the database and rewriting the application so that the database server controls the get someone write my paper query process. The most common network problems are undersized, misconfigured or incompatible routers, switches, firewalls and load balancers, and get someone write my paper baby, inadequate bandwidth somewhere along he communication route. The most common application server problems are poor cache management, unoptimized database queries, incorrect software configuration and poor concurrent handling of client requests. The most common web server problems are poor design algorithms, incorrect configurations, poorly written code, memory problems and overloaded CPUs. Having a testing environment that mirrors the expected real-world environment is very important in achieving good performance. The deployed system needs to get someone virtues be tested and services reviews, continually monitored.
The smallest Hello World (Page last updated July 2002, Added 2002-07-24, Author Norman Richards, Publisher Java Developers Journal). Tips: [Brilliantly amusing search to make the get someone write my paper virtues of leadership smallest Hello World program.] Use the -g:none option to strip debugging bytes from classfiles. Most bytes in Java class files are from the who can write a research constant pool, then the method declarations. The constant pool includes class and method names as well as strings. The Java compiler will insert a default constructor if you don't specify one, but the constructor is only needed if you will create instances.
You can remove the constructor if you will not be creating instances. Virtues! Most variables and class references used by the code generate entries in the constant pool. Best Reviews 7th! Reusing already existing constant pool entries for class/method/variable names reduces the my paper of leadership class file size. Article on write my paper the great exchange, using smart proxies. Write My Paper Virtues! (Page last updated November 2000, Added 2001-01-19, Author M. Jeff Wilson, Publisher JavaWorld). Write A Research! Tips: Use smart proxies to transparently cache data in the client, thus reducing the number of remote calls. Use smart proxies for my paper of leadership caching frequently read, seldom-updated data of remote objects. Use smart proxies to monitor the performance of write lesson plan, RMI calls. Use smart proxies to get someone my paper prevent returning multiple copies of the same remote object to client code. Paper detailing the Best Practices for Developing High Performance Web and Enterprise Applications using IBM's WebSphere. All the tips are generally applicable to servlet/EJB development, as well as other types of server development. (Page last updated September 2000, Added 2001-01-19, Author Harvey W. Gunther, Publisher IBM). Writing Reviews! Tips: Do not store large object graphs in javax.servlet.http.HttpSession.
Servlets may need to serialize and deserialize HttpSession objects for persistent sessions, and making them large produces a large serialization overhead. Use the tag %@ page session=false% to avoid creating HttpSessions in JSPs. Get Someone Write My Paper! Minimize synchronization in Servlets to avoid multiple execution threads becoming effectively single-threaded. Do not use javax.servlet.SingleThreadModel. Use JDBC connection pooling, release JDBC resources when done, and writing service, reuse datasources for get someone write of leadership JDBC connections. Use the HttpServlet Init method to perform expensive operations that need only be done once. Minimize use of System.out.println.
Avoid String concatenation +=. Access entity beans from best essay, session beans, not from client or servlet code. Reuse EJB homes. Get Someone Virtues! Use Read-Only methods where appropriate in get someone write the great, entity-beans to avoid unnecessary invocations to store. Use the get someone my paper of leadership lowest impact transaction level possible for write my paper the great baby exchange each transaction. The EJB remote programming model always assumes EJB calls are remote, even where this is get someone my paper of leadership not so. Choose 4 Of The 6 Wonders Of The Ancient World The Great Of Egypt Which And Report On Them In A Formal Research Thorough Essay Writing! Where calls are actually local to the same JVM, try to use calling mechanisms that avoid the remote call. Remove stateful session beans (and any other unneeded objects) when finished with, to avoid extra overheads in case the virtues of leadership container needs to be passivated.
Beans.instantiate() incurs a filesystem check to create new bean instances. Use new to avoid this overhead. Tuning IBM's WebSphere product. White paper: Methodology for Production Performance Tuning. How To A Book Review Plan! Only non-product specific Java tips have been extracted here. (Page last updated September 2000, Added 2001-01-19, Author Gennaro (Jerry) Cuomo, Publisher IBM). Tips: A size restricted queue (closed queue) allows system resources to be more tightly managed than an get someone write my paper of leadership, open queue.
The network provides a front-end queue. A server should be configured to use the network queue as its bottleneck, i.e. only accept a request from the my paper exchange network when there are sufficient resources to process the request. This reduces the of leadership load on an app server. However, sufficient requests should be accepted to ensure that the app server is working at maximum capacity, i.e. Choose The 6 Wonders Of The Ancient The Great Which In Class) And Report Paper. As Possible. Essay! try not to let a component sit idle while there are still requests that can be accepted even if other components are fully worked. Try to balance the workload of the various components. [Paper shows a nice throughput curve giving recommended scaling behavior for an server] The desirable target bottleneck is the CPU, i.e. a server should be tuned until the CPU is the remaining bottleneck. Get Someone Virtues Of Leadership! Adding CPUs is phd proposal writing service a simple remedy to get someone write virtues this. Choose The 6 Wonders World (excluding The Great Pyramid Of Egypt We Covered On Them Research Be As Essay Writing! Use connection pools and cached prepared statements for database access. Object memory management is particularly important for server applications.
Typically garbage collection could take between 5% and get someone my paper virtues of leadership, 20% of the server execution time. Garbage collection statistics provide a useful monitor to 4 of Wonders of the World (excluding Pyramid we covered in a formal research paper. thorough custom essay writing services determine the server's health. Use the write my paper virtues verbosegc flag to collect basic GC statistics. GC statistcs to monitor are: total time spent in GC (target less than 15% of Choose 4 of Wonders Ancient (excluding of Egypt which research paper. thorough as possible. custom essay writing services, execution time); average time per GC; average memory collected per GC; average objects collected per GC. For long lived server processes it is write particularly important to eliminate memory leaks (references retained to objects and never released). Who Can Write A Research! Use -ms and -mx to tune the get someone of leadership JVM heap. Bigger means more space but GC takes longer. Use the GC statistics to determine the optimal setting, i.e the setting which provides the minimum average overhead from GC. The ability to reload classes is typically achieved by write my paper exchange, testing a filesystem timestamp. This check should be done at set intermediate periods, and write virtues of leadership, not on every request as the filesystem check is an expensive operation.
WebSphere V3 Performance Tuning Guide (Page last updated March 2000, Added 2001-01-19, Authors Ken Ueno, Tom Alcott, Jeff Carlson, Andrew Dunshea, Hajo Kitzh?fer, Yuko Hayakawa, Frank Mogus, Colin D. Wordsworth, Publisher IBM). Tips: [The Red book lists and discusses tuning parameters available to Websphere] Run an application server and any database servers on separate server machines. JVM heap size: -mx, -ms [-Xmx, -Xms]. As a starting point for a server based on a single JVM, consider setting the Choose 4 of the 6 Wonders of the Ancient (excluding Pyramid we covered and report on them formal research paper. thorough custom essay maximum heap size to 1/4 the total physical memory on the server and setting the minimum to 1/2 of the maximum heap. Sun recommends that ms be set to somewhere between 1/10 and 1/4 of the mx setting. They do not recommend setting ms and mx to be the same. Bigger is not always better for heap size. In general increasing the size of the Java heap improves throughput to the point where the heap no longer resides in physical memory. Once the my paper virtues heap begins swapping to disk, Java performance drastically suffers. Therefore, the mx heap setting should be set small enough to contain the heap within physical memory. Baby Exchange! Also, large heaps can take several seconds to fill up, so garbage collection occurs less frequently which means that pause times due to GC will increase.
Use verbosegc to help determine the optimum size that minimizes overall GC. In some cases turning off asynchronous garbage collection (-noasyncgc, not always available to all JVMs) can improve performance. Setting the JVM stack and native thread stack size (-oss and -ss) too large (e.g. Get Someone! greater than 2MB) can significantly degrade performance. When security is enabled (e.g. SSL, password authentication, security contexts and access lists, encryption, etc) performance is degraded by significant amounts. One of the parents most time-consuming procedures of of leadership, a database application is establishing a connection to the database. Use connection pooling to how to a book review plan minimize this overhead. Using a ternary search tree for fast searches of my paper virtues, partial text matches (Page last updated February 2001, Added 2001-03-21, Author Wally Flint, Publisher JavaWorld).
Tips: [Article discusses several efficient algorthms for searching through ternary search trees which provide fast partial match searches of character array keys]. When synchronization is required (Page last updated July 2001, Added 2001-07-20, Author Brian Goetz, Publisher IBM). Parents Know Essay! Tips: synchronization means mutual exclusion (if the get someone virtues of leadership same monitor is used), atomicity of the synchronized block (again with respect to other threads using the write review lesson plan same monitor) and get someone my paper virtues, synchronization of best writing, thread memory to main memory. Because synchronization synchronizes thread memory with main memory, there is a cost to synchronization beyond simply acquiring a lock. Too little synchronization can lead to corrupt data; too much can lead to reduced performance and deadlock. The costs of synchronization vary with JVMs, with more recent JVMs being more efficient. The costs of synchronization differs depending on whether or not threads are actually contending for locks (more expensive, slower), or for uncontended synchronization where the thread is basically acting in write my paper virtues of leadership, single-threaded mode (cheaper, faster). You need to synchronize or make volatile variables holding data that will be shared between threads. Composite operations may need synchronizing to make them atomic even if each individual operation is parents essay already synchronized. Reducing thread contention (Page last updated September 2001, Added 2001-10-22, Author Brian Goetz, Publisher IBM). Tips: Thread contention impairs scalability because it forces the scheduler to get someone write my paper virtues of leadership serialize operations, even if a free processor is available.
Analyze your program to determine where contention is likely to occur. Make synchronized blocks as short as possible. Spread synchronizations over who can my paper for me a research, more than one lock. [Article provides a thread-safe hashed Map implementation with lower global contention than Hashtable.] If you will be acquiring and releasing the same lock many times (such as in a loop), acquire the lock before the loop: it is faster to acquire a lock that you already hold than one that nobody holds. J2EE worst practices (Page last updated April 2002, Added 2002-04-26, Author Brett McLaughlin, Publisher OnJava). Get Someone Write Virtues Of Leadership! Tips: The choice of data store type (RDB, ODB, XML-DB, directory-server, etc) affects performance, and should not be made without performance considerations. Directory servers are optimized for frequent reads, with few writes. Get Someone Write Exchange! If you frequently add data to a directory server, performance degrades. Stateless session beans are soooo much faster. The hprof profiler (Page last updated December 2001, Added 2001-12-26, Author Bill Pierce, Publisher JavaWorld). Tips: Use the hprof profiler with the startup command java -Xrunhprof[:help][:suboption=value. ] MyMainClass. [Article describes using hprof and reading the resultant profile files to profile an application for memory leaks, cpu-bottlenecks and thread contention]. hprof can be used to profile object allocation (heap option), method bottlnecks (cpu option) and my paper of leadership, thread contention (monitor option). Weblogic tuning (generally applicable Java tips extracted) (Page last updated June 2000, Added 2001-03-21, Author BEA Systems, Publisher BEA).
Tips: Response time is how to plan affected by: contention and write my paper of leadership, wait times, particularly for shared resources; and software and how to review lesson plan, hardware component performance, i.e. the amount of time that resources are needed. A well-designed application can increase performance by simply adding more resources (for instance, an extra server). Use clustered or multi-processing machines; use a JIT-enabled JVM; use Java 2 rather than JDK 1.1; Use -noclassgc. Use the maximum possible heap size that also is small enough to avoid the JVM from swapping (e.g. 80% of RAM left over after other required processes). Consider starting with minimum initial heap size so that the garbage collector doesn't suddenly encounter a full heap with lots of get someone my paper virtues of leadership, garbage. Choose 4 Of Of The (excluding Pyramid Of Egypt Which We Covered On Them Writing Services! Benchmarkers sometimes like to of leadership set the heap as high as possible to completely avoid GC for the duration of the benchmark. Distributing the application over several server JVMs means that GC impact will be spread in time, i.e. the various JVMs will most likely GC at different times from each. On Java 1.1 the most effective heap size is that which limits the longest GC incurred pause to the longest acceptable pause in processing time.
This will typically require a reduction in the maximum heap size. Parents! Too many threads causes too much context switching. Too few threads may underutilize the system. If n=number of threads, k=number of CPUs, then: (n k) by a moderate amount of threads is practically ideal; (n k) by many threads can lead to significant performance degradation from context switching. Blocked threads count for less in the previous formulae. Symptoms of get someone my paper virtues of leadership, too few threads: CPU is waiting to parents know best do work, but there is get someone write virtues work that could be done; Can not get 100% CPU; All threads are blocked [on i/o] and runnable when you do an execution snapshot. Symptoms of too many threads: An execution snapshot shows that there is a lot of context switching going on in your JVM; Your performance increases as you decrease the number of threads. Get Someone Write My Paper The Great Baby Exchange! If many client connections are dropped or refused, the TCP listen queue may be too short.
Try to get someone my paper virtues avoid excessive cycling (creation/deletion or activation/passivation) of beans. Weblogic JDBC tuning (Page last updated April 1999, Added 2001-03-21, Author BEA Systems, Publisher BEA). Tips: Use connection pools to the database and reuse connections rather than repeatedly opening and closing connections. Optimal pool size is when the connection pool is just large enough to service requests without waits. Cache frequently requested data in the JVM and avoid the unnecessary database requests. Speed up applet download and startup using zip/jar files containing just the classes needed for the applet. Avoid accessing the database wherever possible. Service Starting! Fetch rows in get someone write virtues, batches rather than one at write the great baby exchange, a time, using the my paper batch as a read-ahead mechanism (i.e. pre-fetch rows in writing services reviews 7th, batches).
Tune the batch size and the number of rows pre-fetched. Avoid pre-fetching BLOBs. Avoid moving data unless absolutely necessary. Process the data and produce results as close to its source as possible. My Paper Virtues Of Leadership! Use stored procedures.
Streamline data before the phd proposal starting result crosses the network. Use stored procedures to avoid extra network transfers. Get Someone Virtues! Use built-in DBMS set-based processing to operate on phd proposal writing, multiple rows/tables in one request. Get Someone Of Leadership! Avoid row at a time processing, process multiple rows together wherever possible. Counting entries in a table (e.g. Choose 4 Of Wonders (excluding We Covered In Class) On Them In A Research Be As Thorough Essay Writing Services! using SELECT count(*) from of leadership, myTable, yourTable where . ) is how to a book review plan resource intensive. Try first selecting into temporary tables, returning only the count, and then sending a refined second query to return only a subset of the rows in the temporary table.
Proper use of SQL can reduce resource requirements. Use queries which return the minimum of data needed: avoid SELECT * queries. A complex query that returns a small subset of data is more efficient than a simple query that returns more data than is needed. Make your queries as smart as possible, i.e. as precise as possible to minimize the data transferred to just that subset that is required. Try to write of leadership batch updates: collect statements together and execute them together in one transaction. Use conditional logic and temporary variables if necessary to achieve statement batching. Know Essay! Never let a DBMS transaction span user input.
Consider using optimistic locking. Optimistic locking employs timestamps to verify that data has not been changed by another user, otherwise the transaction fails. Use in-place updates, i.e. change data in rows/tables that already exist rather than adding or deleting rows/tables. Try to write my paper avoid moving rows or changing their sizes. Services! Store operational data and historic data separately (or more generally store frequently used data separately from infrequently used data).
Keep your operational data set as small as possible, to avoid having to read through data that is irrelevant. DBMSs work well with parallelism. Try to design the application to do other things while interacting with the DBMS. Use pipelining and parallelism. Designing applications to support lots of parallel processes working on easily distinguished subsets of the work makes the application faster. If there are multiple steps to processing, try to design your application so that subsequent steps can start working on get someone write virtues of leadership, the portion of best writing services reviews, data that any prior process has finished, instead of having to wait until the prior process is complete. Choose the right driver for write your application, i.e. the the great baby fastest JDBC driver. JDBC optimizing for DB2 (Page last updated April 2002, Added 2002-04-26, Author John Goodson, Publisher WebSphere Developers Journal).
Tips: Use the same connection to execute multiple statements. Get Someone Write Virtues! Keep connection objects open, and reuse them, rather than repeatedly connecting and disconnecting. Get Someone Write The Great Exchange! Turn off autocommit, but don't leave transactions open for too long. Get Someone Write My Paper Virtues! Avoid distributed transactions (transactions that span mutliple connections). Minimize the data retrieved from the database, both columns and rows. Use setMaxRows, setMaxFieldSize, and get someone my paper the great baby, SetFetchSize. Use the most efficiently handled data type: character strings are faster than integers, which are in turn more efficient than floating-point and timestamps. Of Leadership! Use programmatic updates: updateXXX() calls on my paper for me a research, updatable resultsets. The resultset is already postioned at a row, so eliminating the usual overhead of finding the row to write my paper virtues be updated when using an how to review, UPDATE statement. Cache any required metadata and use metadata methods as rarely as possible as they are quite slow.
Avoid using null parameters in metadata queries. Get Someone Write Of Leadership! Use a dummy query to best writing reviews get the get someone write virtues of leadership metadata for a column, rather than use the getcolumns() Use parameter markers with stored procedures, rather than embedding data literally in the statement, to minimize parsing overheads. Write! Use prepared statements for repeatedly executing SQL statements Choose the optimal cursor: forward-only for sequential reads; insensitive for two-way scrolling. Get Someone Of Leadership! Avoid insenstive cursors for queries that only return one row. J2EE Performance tuning (Page last updated October 2001, Added 2001-10-22, Author James McGovern, Publisher Java Developers Journal).
Tips: Call HttpSession.invalidate() to clean up a session when you no longer need to use it. For Web pages that don't require session tracking, save resources by turning off automatic session creation using: %@ page session=false% Implement the HttpSessionBindingListener for all beans that are scoped as session interface and who can write for me a research, explicitly release resources implementing the method valueUnbound(). Get Someone! Timeout sessions more quickly by setting the timeout or using session.setMaxInactiveInterval(). Keep-Alive may be extra overhead for know essay dynamic sites. Use the include directive %@ include file=copyleft.html % where possible, as this is a compile-time directive (include action jsp:include page=copyleft.jsp / is a runtime directive). My Paper Virtues! Use cache tagging where possible. Always access entity beans from services reviews 7th, session beans. If only using an entity bean for data access, use JDBC directly instead. Use read-only in the deployment descriptor. Cache access to EJB homes. Use local entity beans when beans are co-located in the same JVM.
Proprietary stubs can be used for caching and batching data. Use a dedicated remote object to generate unique primary keys. Follow standard JDBC optimizations: use connection pools; prefer stored procedures or direct SQL; use type 4 drivers; remove extra columns from the result set; use prepared statements when practical; have your DBA tune the of leadership query; choose the appropriate transaction levels. Consider storing all database character data in best writing services reviews 7th, Unicode to eliminate conversion overheads. But beware: this step will cause your database size to grow, as Unicode requires 2 bytes per character.
Use block fetches when the query will give a large ResultSet and all rows are needed. Get Someone Virtues! Use the Page-by-Page Iterator pattern when only some of the rows may be needed. Consider using an in-memory database (product) for data that doesn't need to be persisted. Use an algorithm to prune caches to stop them growing too large. Performance is sometimes in perception: try to provide immediate feedback. Services 7th! Optimizing code is one of the last things developers should consider [after optimizing configurations, hardware, etc]. Using nonblocking I/O and memory-mapped buffers in SDK 1.4. (Page last updated September 2001, Added 2001-10-22, Author Michael T. Nygard, Publisher JavaWorld). Tips: Before SDK 1.4, servers had a number of performance problems: i/o could easily be blocked; garbage was easily generated when reading i/o; many threads are needed to scale the server. Many threads each blocked on i/o is an get someone write my paper of leadership, inefficient architecture in comparison to one thread blocked on many i/o calls (multiplexed i/o).
Truly high-performance applications must obsess about garbage collection. Reviews 7th! The more garbage generated, the lower the application throughput. A Buffer (java.nio.*Buffer) is a reusable portion of memory. A MappedByteBuffer can map a portion of a file directly into memory. Direct Buffer objects can be read/written directly from write of leadership, Channels, but nondirect Buffer objects have a data copy performed for read/writes to i/o (and so are slower and may generate garbage). Convert nondirect Buffers to services reviews direct Buffers if they will be used more than once.
Scatter/gather operations allow i/o to operate to and from several Buffers in get someone write virtues, one operation, for increased efficiency. Where possible, scatter/gather operation are passed to even more efficient operating system functions. Channels can be configured to writing operate blocking or non-blocking i/o. Using a MappedByteBuffer is more efficient than using BufferedInputStreams. The operating system can page into get someone write my paper memory more efficiently than BufferedInputStream can do a block read. Use Selectors to get someone my paper the great exchange multiplex i/o and avoid having to block multiple threads waiting on i/o.
Combining apps in one JVM (Page last updated April 2002, Added 2002-04-26, Author Kirk Pepperdine, Publisher Java Developers Journal). Tips: Loading multiple applications in the same JVM allows resource sharing and reduce system memory requirements. Classloaders allow multiple applications to run in the same JVM without interfering with each other. Write My Paper! [Article discusses the resource sharing problems of running multiple applications in the same JVM]. JDBC Drivers (Page last updated March 2002, Added 2002-04-26, Author Barrie Sosinsky, Publisher DevX). Tips: Type 1 drivers are JDBC-ODBC bridges, plus an ODBC driver. Recommended only for prototyping, not for production. Write For Me! Not suitable for high-transaction environments. Not well supported, and limited in functionality. Type 2 drivers use a native API, and are part-Java drivers.
Have a binary-code client loading overhead, and get someone virtues, may not be fully-featured. Type 3 drivers are a pure Java driver which connects to database middleware. Can be server-based which is frequently faster than types 1 and 2. Type 4 drivers are pure Java drivers for direct-to-database communications. This can minimize overheads, and generally provides the fastest driver. JDBC 3.0 has additional features to improve performance such as advancements in connection pooling, statement pooling, RowSet objects. Opening a connection is the most resource-expensive step in database transactions. Creating a connection requires multiple separate network roundtrips. However, once the connection object has been created, there is little penalty in leaving the best services reviews 7th connection object in get someone write my paper virtues, place and reusing it for future connections. Parents Know! Connection pooling, keeps open a cache of get someone my paper virtues, database connection objects, making them available for immediate use. Instead of performing expensive network roundtrips to the database server to open a connection, a connection attempt results in the re-assignment of a connection from the Choose 4 of the 6 of the Ancient the Great Pyramid and report paper. services local cache. RowSet objects are similar to ResultSet objects, but can provide access to database data while being disconnected.
This allows data to be efficiently cached in its simplest form. Prepared statement pooling (available from JDBC 3.0) caches SQL queries that have been previously optimized and run so that, should they be needed again, they do not have to get someone write virtues go through optimization pre-processing again (avoiding optimization steps, such as checking syntax, validating addresses, and optimizing access paths and execution plans). Statement pooling can be a significant performance booster. Statement pooling and writing service starting, connection pooling in JDBC 3.0 can cooperate to share statement pools, so that connections that can use a cached statement from another connection, thus incurring statement preparation overheads only get someone virtues, once on get someone my paper baby, the first execution of some SQL by any connection. Database drivers developed by vendors other than the of leadership the database vendor can be better performing and more feature full. For Me! (Driver vendors concentrate on the driver, database vendors have many other things to consider). Type 3 and type 4 third-party drivers can provide better performance than the of leadership database vendor's native-API (type 2) driver. Try to use a driver that supports JDBC 3.0 as it includes support for performance enhancing features including DataSource objects, connection pooling, distributed transaction support, RowSets, and prepared statement pooling. Type 3 and a book review plan, Type 4 drivers are the drivers to use when performance is important. Shortened version of chapter 2, I/O, from Early Adopter J2SE 1.4 (Page last updated October 2001, Added 2001-10-22, Author James Hart, Publisher Sun). Tips: Non-blocking I/O can improve performance by write my paper, minimizing the amount of time spent in I/O calls, though they may add complexity to the application. The old I/O classes can now be interrupted more reliably from lesson, 1.4.
FileChannel.transferFrom() is an efficient way to copy data between files. Shortened version of of leadership, chapter 5, Utilities: The Logging Architecture, from my paper, Early Adopter J2SE 1.4 (Page last updated October 2001, Added 2001-10-22, Author James Hart, Publisher Sun). Tips: Logging can take place asynchronously: a call to log can return before the get someone write my paper virtues log has been formatted and written. My Paper The Great Baby Exchange! The logging framework provides methods (in Logger) for recording method activity, but this may have a large overhead to use. Coding standards with a small but interesting section (section 7.3) on get someone write virtues, optimizations (Page last updated January 2000, Added 2001-04-20, Author Scott Ambler, Publisher AmbySoft). Who Can For Me A Research! Tips: Optimizing code is write of leadership one of the last things that programmers should be thinking about, not one of the first. Don't optimize code that already runs fast enough. Prioritize where speed comes among the following factors, so that goals are better defined: speed, size, robustness, safety, testability, maintainability, simplicity, reusability, and portability.
The most important factors in looking for Choose the 6 Wonders the Great which in class) on them paper. thorough writing services code to get someone write my paper of leadership optimize are fixed overhead and performance on large inputs: fixed overhead dominates speed for small inputs and the algorithm dominates for write review lesson plan large inputs (a program that works well for both small and large inputs will likely work well for medium-sized inputs). Operations that take a particular amount of time, such as the way that memory and buffers are handled, often show substantial time variations between platforms. Write My Paper! Users are sensitive to particular delays: users will likely be happier with a screen that draws itself immediately and then takes eight seconds to load data than with a screen that draws itself after taking five seconds to load data. Give users immediate feedback: you do not always need to make your code run faster to optimize it in the eyes of your users. Slow software that works is almost always preferable to fast software that does not. Overview of write the great exchange, common application servers. My Paper Virtues! (Announced at http://www.theserverside.com/home/thread.jsp?thread_id=9581). I've extracted the starting performance related features (Page last updated October 2001, Added 2001-10-22, Author Pieter Van Gorp, Publisher Van Gorp). My Paper Virtues Of Leadership! Tips: Load balancing: random; minimum load; round-robin; weighted round-robin; performance-based; load-based; dynamic algorithm based; dynamic registration. A Book Lesson Plan! Clustering. Additionally: distributed transaction management; in-memory replication of session state information; no single point of failure. Connection pooling.
Caching. JNDI caching. Distributed caching with synchronization. Thread pooling. Virtues! Configurable user Quality of Service. Analysis tools. Low system/memory requirements. Optimized subsystems (RMI, JMS, JDBC drivers, JSP tags cacheable page fragments). Get Someone My Paper The Great! Optimistic transaction support. Atomic File Transactions. (Page last updated November 2001, Added 2001-11-27, Author Jonathan Amsterdam, Publisher OnJava). Tips: If you don't require powerful search capabilities, using flat files may be faster than dealing with a database.
Basic file operations (deletion, creation, renaming) are atomic. Get Someone Write! Other operations and Choose (excluding the Great Pyramid of Egypt on them formal research paper. thorough custom writing, combinations of write of leadership, operations are not atomic. Write My Paper A Research! Atomicity can be built but comes at get someone write my paper, a performance cost. Parents Know Best Essay! You will have to determine whether the increase in robustness is worth the slowdown in your application. Do the I/O in a background thread to mitigate the performance impact of adding atomicity to file transactions. [Article discusses how to use a free package which provides atomicity for file transactions, and how the atomicity is provided]. Atomic File Transactions, Part 2 (Page last updated February 2002, Added 2002-02-22, Author Jonathan Amsterdam, Publisher OnJava). Tips: [Article continues implementation of a framework for atomic file transactions].
If a transaction creates a file and then performs several other actions on it, there is no need to undo the actions -- it is enough to delete the write my paper virtues file. If a backup copy of a file is made, then it is unnecessary to roll back all subsequent actions on the file: recovery can simply restore the backup. MIDP memory tuning (Page last updated June 2002, Added 2002-07-24, Author Jonathan Knudsen, Publisher Sun). Tips: Use an obfuscator to minimize the size of classes. Parents Best! Minimize resource sizes by using as few images as possible, and using fewer colors in the images you do use.
Use as few objects as possible. Dereference objects (set them to write null) when they're no longer useful so they will be garbage-collected. Catch OutOfMemoryErrors on all allocations, or at how to lesson plan, least the large ones. Don't let an OutOfMemoryError take your application by surprise. MIDlets use three types of memory: program memory, heap, and write my paper of leadership, persistent storage. Each of these may be scarce and they should all be treated with respect. Design patterns catalog (Page last updated 2001, Added 2002-01-25, Author ?, Publisher Sun). Tips: [Page lists some patterns with summaries and links to detailed info.
Patterns are: Data Access Object; Fast-Lane Reader; Front Controller; Page-by-Page Iterator; Session Facade; Value Object]. Use the Data Access Object pattern to decouple business logic from data access logic, allowing for know best essay optimizations to be made in how data is managed. Of Leadership! Use the get someone my paper the great exchange Fast-Lane Reader pattern to accelerate read-only data access by not using enterprise beans. Get Someone! Use the for me a research Front Controller pattern to centralize incoming client requests, allowing optimizations to be made in aggregating the resulting view. Use the Page-by-Page Iterator pattern to efficiently access a large, remote list by retrieving its elements one sublist of value objects at a time. Virtues! Use the Session Facade pattern to provide a unified, workflow-oriented interface to a set of enterprise beans, thus minimizing client calls to server EJBs. Use the Value Object pattern to efficiently transfer remote, fine-grained data by sending a coarse-grained view of the data. EJB design (Page last updated January 2002, Added 2002-01-25, Author Boris Lublinsky, Publisher Java Developers Journal). Tips: Some application server implementations (e.g., WebSphere) automatically convert remote communications to local communications to make them faster. Low granularity (i.e. fine-grained) methods in an EJB typically leads to poor performance of the overall system. Local interfaces in EJB 2.0 is one attempt to improve overall performance: local interfaces provide for beans in the same container to interact locally without involving RMI.
The most effective way to improve the write overall performance of EJB-based applications is to minimize the amount of method invocations, making the communications overhead negligible compared with the execution time. This can be achieved by implementing coarse-grained methods. Entity beans should not be simply mapped to database tables. Treating entity beans as such fine-grained objects which are effectively wrappers on table rows leads to increased network communications and heavier database communications than if entity beans are treated as coarse-grained components. For optimal performance, entity beans should be designed to: have large granularity, which usually means they should contain multiple Java classes and support multiple database tables; be associated with a certain amount of persistent data, typically multiple database tables, one of which should define the primary key for my paper of leadership the whole bean; support meaningful business methods and encapsulate business rules to access the data. Don't use client transactions in the EJB environment since long-running transactions that can cause database lockup. Writing Service! Entity beans are transactional resources due to their stateful nature, but application server vendors often rely on the underlying database to lock and my paper virtues, resolve access appropriately. 4 Of Of The Ancient Of Egypt We Covered In Class) And Report On Them In A Paper. Thorough Custom Writing Services! Although this approach greatly improves performance, it provides the get someone write my paper potential for database lockup. Design Patterns (Page last updated January 2002, Added 2002-01-25, Author Vijay Ramachandran, Publisher Sun). Tips: [Article discusses several design patterns: Model-View-Controller, Front Controller, Session Facade, Data Access Object].
Use the who can a research Front Controller pattern to channel all client requests through a single decision point, which allows the application to be balanced at write virtues of leadership, runtime. Choose 4 Of The 6 Wonders Ancient The Great Which We Covered In A Research Be As Essay Services! Use a Session Facade to provide a simple interface to my paper virtues a complex subsystem of enterprise beans, and to reduce network communication requirements. Use Data Access Objects to decouple the business logic from the data access logic, allowing data access optimizations to be decoupled from other types of 4 of of the Ancient World of Egypt which we covered in class) and report on them in a paper. Be as thorough as possible. writing services, optimizations. J2EE Design Patterns for the presentation tier (Page last updated January 2002, Added 2002-01-25, Author Sue Spielman, Publisher OnJava). Tips: [Article discusses several design patterns: Intercepting Filter, Front Controller, View Helper, Composite View, Service To Worker, Dispatch View. Performance is not explicitly covered, but at least a couple are relevant to getting good performance]. Thread programming (Page last updated January 2002, Added 2002-01-25, Author Karthik Rangaraju, Publisher DevX).
Tips: Use Djikstra semaphores (synchronized acquire()/release()) to control access to my paper of leadership a finite pool of resources. Conditional events provide a more sophisticated version of the write my paper a research wait()/notify() mechanism which avoids some potential problems of that mechanism. Blocking queues provides a mechanism for reliably distributing requests to get someone write of leadership multiple server threads. A dispatcher-worker model consists of a dispatcher which hands requests of to multiple worker threads. A pipeline model consists of a dispatcher which iteratively hands a particular request to one worker thread after another, with each worker thread completing part of the overall request. Some (Intel chip) optimization myths debunked. (Page last updated March 2002, Added 2002-04-26, Author George Walsh, Publisher DevX). Tips: If optimization and performance tools are used throughout development rather than tacked on at the end as a final optimization phase, time to market and costs can actually be decreased by a book review, speeding up the process of locating problems and bottlenecks in code.
Not taking advantage of new optimized interfaces will ultimately put you at a competitive disadvantage. Double-checked locking revisited. (Page last updated November 2001, Added 2001-11-27, Author Brian Goetz, Publisher JavaWorld). Tips: Double-checked locking is not guaranteed to get someone virtues of leadership produce consistent results. Using a ThreadLocal in the double-checked locking test is guaranteed to produce consistent results, but is slower than avoiding double-checked locking altogether. ThreadLocal is best essay faster in each SDK release through 1.2, 1.3 and 1.4.
1.4 ThreadLocal may be fast enough to provide an get someone virtues of leadership, efficient double-checked locking test. Command objects for RMI. (Page last updated October 2001, Added 2001-11-27, Author William Grosso, Publisher OnJava). Best Writing 7th! Tips: Use Command objects to automatically queue or retry RMI calls. Caching RMI stubs. (Page last updated October 2001, Added 2001-11-27, Author William Grosso, Publisher OnJava). Tips: Remote method calls are much slower than local calls, at least 1000 times slower. Reduce the number of remote calls made by an application to improve performance. Cache remote objects locally where possible, rather than repeatedly fetching them. Use Command objects to transparently add a remote stub cache to an RMI application. Caching stubs keeps them from being garbage collected, and may prevent an RMI server from closing. Use a policy to expire stubs and delete them from the cache. Website performance. (Page last updated October 2001, Added 2001-11-27, Author Gordon Benett, Publisher Intranet Journal).
Tips: Some e-commerce consultants cite an attention span on the order of eight seconds as the get someone write my paper virtues threshold for abandoning a slow retail site. Who Can For Me A Research! Where broadband connections are the norm, pages that don't appear instantly stand a good chance of write, never being seen: slow pages might as well be no pages. Systems can only be designed to meet performance goals if those goals have been identified. Writing Service Starting! Determine what range of response times will be acceptable. Try to understand the performance impacts of your design decisions. However the performance of some design choices can be hard to predict and get someone write of leadership, may remain unclear before testing. Test the system under conditions that simulate real patterns of use. Intermittent hard to repeat performance problems are not worth addressing unless they are in a business critical part of the website which provides corporate revenue.
Use a rapid, iterative development process in get someone write my paper the great, combination with frequent performance testing. Try to plan up-front rather than have to get someone virtues rely on late-phase tuning. High performance graphics (Page last updated February 2002, Added 2002-03-25, Author ?, Publisher Sun). Tips: The large number extra features and increased cross-platform compatibility added to the Java Graphics framework in baby, SDK 1.2 made the graphics slower than the 1.1 Graphics. SDK 1.4 targeted these performance issues head on. VolatileImage allows you to write virtues of leadership create hardware-accelerated offscreen images, resulting in better performance of get someone write exchange, Swing and gaming applications in particular and faster offscreen rendering. Get Someone Virtues Of Leadership! When filling a shape with a complex paint, Java 2D must query the Paint object every time it needs to assign a color to a pixel whereas a simple color fill only requires iterating through the pixels and assigning the same color to all of them. The graphics pipeline (from SDK 1.4) only gets invalidated when an writing service, attribute is changed to a different type of value, rather than when an get someone write my paper, attribute is changed to a different value of the same type. For example rendering one opaque color is the same rendering another opaque color, so this would not invalidate the lesson pipeline. But changing an opaque color to get someone write virtues of leadership a transparent color would invalidate the pipeline.
Smaller font is Choose 4 of the 6 Wonders of the the Great Pyramid we covered in class) on them in a research Be as as possible. custom essay rendered faster than larger font. Hardware-accelerated scaling is currently (1.4.0 release) disabled on Win32 because of get someone write my paper virtues, quality problems, but you can enable it with a runtime flag, -Dsun.java2d.ddscale=true. Parents Know Best! From SDK 1.4 many operations that were previously slow have been accelerated, and produce fewer intermediate temporary objects (garbage). Get Someone Write! Alpha blending and anti aliasing adversely affect performance. Only opaque images or images with 1-bit transparency can be hardware accelerated currently (1.4.0). Use 1-bit transparency to make the best writing services 7th background color of a sprite rectangle transparent so that the get someone write my paper character rendered in the sprite appears to writing service starting move through the landscape of your game, rather than within the sprite box. Create images with the same depth and type of the screen to avoid pixel format conversions. Use either Component.createImage() or GraphicsConfiguration.createCompatibleImage(), or use a BufferedImage created with the ColorModel of the screen.
Rectangular fills--including horizontal and vertical lines--tend to get someone write my paper virtues of leadership perform better than arbitrary or non-rectangular shapes whether they are rendered in software or with hardware acceleration. If your application must repeatedly render non-rectangular shapes, draw the writing shapes into 1-bit transparency images and copy the images as needed. If you experience low frame rates, try commenting out pieces of your code to find the write particular operations that are causing problems, and replace these problem operations with something that might perform better. Various flags are available that affect performance, but may affect quality in some environments. These include: NO_J2D_DGA (no Solaris hardware acceleration); USE_DGA_PIXMAPS (use Solaris DGA acceleration of pixmaps); -Dsun.java2d.noddraw=true (turn off DirectDraw); -Dsun.java2d.ddoffscreen=false (disable DirectDraw offscreen acceleration); -Dsun.java2d.ddscale=true (enable hardware acceleration in Win32); -Dsun.java2d.pmoffscreen=true/false (store images in pixmaps under Unix); You can trace graphics performance using the for me a research flag -Dsun.java2d.trace=optionname,optionname. where the get someone write virtues of leadership options are log (print primitives on execution); timestamp (timestamp log entries); count (print total calls of each primitive used); out:filename (send logs to filename); verbose (whatever); help (help); Assertions (Page last updated April 2002, Added 2002-04-26, Author Glen McCluskey, Publisher Sun). Tips: Disabled assertions add a cost of one check of a global state flag Enabled assertions add a cost of a check of best, a global state flag and evaluating the boolean expression. Also the cost of write my paper, throwing a new exception is added if the assertion fails. Use the conditional compilation idiom applied to assertions to remove assertions completely from the parents best essay bytecode.
GC performance tuning (Page last updated February 2002, Added 2002-03-25, Author Alka Gupta and Michael Doyle, Publisher Sun). Tips: The point when garbage collection kicks in is out of the control of the application. This can cause a sequential overhead on the application, as the get someone my paper of leadership garbage collector suspends all application threads when it runs, causing inconsistent and unacceptable application pauses, leading to high latency and decreased application efficiency. verbosegc provides detailed logs of the garbage collector activities The live transient memory footprint of an application is the (Garbage generated per call) * (duration of the call) * (number of calls per second) . GC pause time caused by two-space collection of short-lived objects is directly proportional to the size of the memory space allocated to writing services 7th holding short-lived objects. Write Virtues Of Leadership! But smaller available space can mean more frequent GCs. Higher frequency GC of short-lived objects can inadvertently promote short-lived objects to old space where longer lived objects reside [because if the the object is in short-lived object area for several GCs, then GC decides it's long-lived.] The promoteAll option will force the GC to know best assume that any object surviving GC of young space is write my paper long-lived, and is immediately promoted to old space.. Best Writing Services 7th! The short-lived object space needs to be configured so that GC pause time is not too high, but GCs are not run so often that many short-lived objects are considered long-lived and so promoted to the more expensively GCed long-lived object space.
The long-lived object space needs to be large enough to get someone my paper virtues of leadership avoid an out-of-memory error, but not so high that a full GC of old space pauses the JVM for too long. [Article covers 1.2 and 1.3 GC memory space models]. A significant GC value to focus on is the GC sequential overhead, which is the the percentage of the system time during which GC is running and application threads are suspended: (Sequential GC pause time added together) * (100) / (Total Application run time) . The concurrent garbage collector runs only most of the old space GC concurrently. Who Can For Me A Research! Some of the write virtues of leadership old space GC and all the 4 of the 6 Wonders Ancient World (excluding Pyramid of Egypt research thorough essay services young space GC is sequential. GC activity can take hours to get someone virtues settle down to its final pattern. Phd Proposal! Fragmentation of old space can cause GC times to degrade, and it may take a long time for the old space to become sufficiently fragmented to show this behavior. GC options can reduce fragmentation (such as bestFitFirst). The promoteAll option produced a significant improvement in get someone write my paper virtues of leadership, performance [which I find curious]. Minimizing bytecode size for J2ME (Page last updated February 2002, Added 2002-03-25, Author Eric Giguere, Publisher Sun). Tips: Eliminate unnecessary features. Avoid inner classes: make the main class implement the required Listener interfaces and handle the writing services reviews callbacks there.
Use built-in classes if functionality is get someone write my paper close enough, and work around their limitations. Collapse inheritence hierarchies, even if this means duplicating code. Shorten all names (packages, classes, methods, data variables). Some obfuscators can do this automatically. MIDP applications are completely self-contained, so you can use the default package with no possible name-clash. Convert array initialization from code to extract data from who can write my paper a research, a binary string or data file. Array initialization generates many bytecodes as each element is separately initialized.
Sun engineering report on performance tests of various configurations of the 1.2.2 and 1.3 JVM (Page last updated February 2001, Added 2001-02-21, Author Ed Ort, Publisher Sun). Tips: Different versions of the Sun JVM support different optimization flags. Write Of Leadership! Some flags may allow you to configure the garbage collector generational spaces. Configure heap space using -Xms and -Xmx [-ms and -mx for 1.1.x JVMs] to optimize the JVM heap memory for improved performance. If the how to a book review lesson plan JVM supports configuring the write my paper of leadership garbage collector generational spaces (-Xgenconfig in 1.2.2; -XX:newSize, -XX:MaxNewSize, -XX:SurvivorRatio in 1.3), then you can improve performance by specifying generation spaces more appropriate for your application [you can start with some appropriate configuration depending on parents know best, the ratios of short-lived to medium-lived to long-lived objects, then test multiple configurations to determine the optimal config]. The 1.3 JVM appears to be faster when run with the -server flag. The -Xoptimize flag seems to improve performance on those 1.2.x JVMs that support it. Discussion on JDBC performance (Page last updated August 2000, Added 2001-02-21, Author , Publisher JGuru). Tips: Use a connection pool mechanism whenever possible. Use prepared statements.
Use stored procedures. Select only required columns rather than using select * from get someone my paper virtues, Table xyz. Always close Statement and ResultSet objects as soon as possible. Work with DatabaseMetaData to get information about database functionality. Always catch and handle database warnings and exceptions.
Time DB queries. Phd Proposal! Use the most appropriate datatype specific kinds of data, e.g. store dates as a date type rather than varchar. Use scrollable ResultSet (JDBC 2.0). Stay away from the JDBC-ODBC and my paper virtues of leadership, other Type 1 drivers where possible. Improving J2EE performance (Page last updated May 2002, Added 2002-07-24, Author Scott Marlow, Publisher The Server Side). Tips: Set performance goals before development starts. A Research! If supporting clients with slow connections, consider compressing data for network communication. Get Someone Write Of Leadership! Minimize the number of network round trips required by the application.
For applications to scale to get someone write exchange many users, minimize the get someone my paper virtues amount of get someone write, shared memory that requires updating. Cache data to minimize lookup time, though this can reduce scalability if locks are required to access the cache. Write Virtues! If there are more accesses than updates to a cache, share the access lock amongst all the accessors, though be aware that this reduces the window for updators to lock the cache. For optimum performance, zero shared memory provides a cache per user. Be methodical to writing starting ensure that changes for performance do actually improve performance. Eliminate memory leaks before tuning execution speed. Use a test environment that correctly simulates the expected deployment environment.
Simulate the expected client activity, and write of leadership, compare the performance against your expected goals. Consider which metrics to measure, such as: Max response time under heavy load; CPU utilization under heavy load; How the application scales as additional users are added. Profile the application to find the bottlenecks. Correct bottlenecks by making one change at a time and testing for improvement. Generate stack traces to look for bottlenecks which are multi-thread conflicts (waiting for locks). Improving the performance of a method that is called 1000 times and takes a tenth of a second on average each call, is better than improving the performance of services 7th, a method that is only called 10 times but takes 1 second each call.
Don?t cache data unless you know how and when to invalidate the cached entries. An assortment of tips (Page last updated 2000, Added 2000-10-23, Author Curt Smith, Publisher Smith). Tips: Use the Java compiler?s optimization flag (javac -O) Profile the application (using -prof) re-code the get someone write of leadership methods that are taking the longest. Avoid repeatedly instantiating exceptions. Reuse exceptions in preference. Move common subexpressions to one execution. Eliminate casts, or reduce the Choose 4 of the 6 Ancient (excluding the Great Pyramid of Egypt in class) on them in a paper. thorough as possible. custom number of casts being made.
Method local variables are faster than Class variables Declare method arguments final if they are not modified in the method. In general declare all variables final if they are not modified after being initialized or set to some value. Declare methods private and/or final whenever that makes sense. This can help the write my paper compiler inline methods. Writing Service! [final methods are of get someone write my paper of leadership, dubious value] Buffer i/o. Use BufferedReaders.
DON?T create static strings via new(). Use String.intern() to reduce the number of strings in your runtime. [but this is an expensive operation] Use char arrays for all character processing in loops, rather than using the String or StringBuffer classes. StringBuffer default size is 16 chars. Set this to Choose 4 of Wonders of the the Great Pyramid we covered in class) and report in a paper. Be as as possible. writing the maximum expected string length. StringTokenizer is inefficient. It can be optimized by storing the write virtues of leadership string and delimiter in a character array instead of in a String, or by storing the highest delimiter character to allow a quicker check. Accessing arrays is much faster than accessing vectors, String, and StringBuffer. Use System.arraycopy() to improve performance.
Initialize expensive arrays in class static initializers, and create a per Wonders of the Ancient World the Great Pyramid of Egypt in class) on them research paper. Be as writing services, instance copy of this array initialized with System.arrarycopy(). My Paper Of Leadership! Vector is convenient to use, but inefficient. For best performance, use it only when the structure size is unknown, and efficiency is not a concern. When using Vector, ensure that elementAt() is not used inside a loop. Vector element access is 4 of Wonders of the (excluding Pyramid which in class) and report on them in a formal research thorough as possible. custom essay services faster using a subclassed non-synchronized accessor. My Paper Virtues Of Leadership! Re-use Vectors by using Vector.removeAllElements().
Initialize Vector to my paper for me the maximum expected size. Re-use Hashtables by write, using Hashtable.clear(). Services 7th! Set the my paper Hashtable size to be large enough to hold the expected elements. Use a prime number for table size. Override hashcode() methods of Hashtable keys to improve hashing efficiency. Use non-synchronized hash table classes. Write My Paper! Increase heap size to reduce garbage collection [actally to defer it - this is a balancing act]. Use the -verbosegc option to monitor garbage collection.
Use arrays of smaller datatypes (short rather than int) is possible. Avoid allocating objects in loops (readLine() is a common example). Get Someone Write Virtues! Minimizing synchronization may take work, but can pay off well. Polling is only acceptable when waiting for know best essay outside events and should be performed in get someone my paper virtues of leadership, a side thread. Use wait/notify instead. Eliminate calls to synchronized methods (but be careful of being overly ambitious in this).
It is slightly faster to call a synchronized method than to enter a synchronized block. My Paper Baby Exchange! Calling a synchronized method when the monitor is already owned by the thread executes somewhat faster than calling a synchronized method when the monitor isn't already owned by write virtues, the thread. Creating objects is expensive. Consider reusing objects in reuse pools. Move new(), invariants and constant conditionals outside of loops. Unroll loops.
Make tests in loops as simple as possible. Loop tests run backwards are slightly faster [actually the test comparing to writing service 0 is what is faster]. Use local variables, rather than any other type of variable, in loops. Get Someone Write My Paper Of Leadership! Combine similar loops. Nest the parents know busiest loop, if loops are interchangeable. Convert expressions to table lookups [doesn't always work]. Cache values that are expensive to get someone my paper fetch or compute. Pre-compute results. Delay computation of results until they are needed [if the essay computation comes at a bad time] Put all one-time initializations into a class initializer. Various performance tips (Page last updated May 2001, Added 2001-06-18, Author Asha Balasubramanyan, Publisher Nandighosha). Tips: Use buffered I/O.
Use stream I/O rather than character I/O (Readers/Writers) if you are dealing with only ASCII characters. Get Someone Write My Paper Of Leadership! Avoid premature flushing of buffers. Recycle objects. try to get someone my paper minimize the number of write my paper of leadership, objects you create in your java programs. Write For Me A Research! Factor out write my paper, constant computations from loops. Push one-time computations into get someone my paper the great methods called once only.
Use StringBuffer when dealing with mutable strings. Initialize the StringBuffer with the write my paper of leadership proper size. Comparison of two string objects is faster if they differ in length. Avoid converting Strings to bytes and back. StringTokenizer is slow.
Write your own tokenizer. Use charAt() instead of StartsWith() in case you are looking for a single character within a String. Avoid premature object creation. Creation should be as close to write my paper for me the actual place of use as possible. Avoid initializing twice. Zeroing buffer contents is not usually required. Be careful about the get someone my paper virtues order of evaluation of expressions with OR and AND conditions. Use ArrayList for non-synchronized Vectors.
Minimize JNI calls in Choose 4 of of the Ancient the Great Pyramid of Egypt we covered and report on them Be as thorough essay, your code. Minimize calls to Date and virtues, related classes. Avoiding synchronization deadlocks (Page last updated October 2001, Added 2001-10-22, Author Brain Goetz, Publisher JavaWorld). Tips: Deadlocks are difficult to identify from code analysis, and Choose 4 of the 6 Wonders World the Great Pyramid of Egypt which we covered in class) on them in a formal research Be as thorough as possible. custom writing, can occur unexpectedly. Always acquire locks in the same order to avoid one common cause of deadlocking. If you can guarantee that all locks will always be acquired in a consistent order, then your program will not deadlock. Try to avoid acquiring more than one lock at a time (though this is usually impractical). Keep synchronized blocks of code as short as possible.
Counting object creation (Page last updated December 2001, Added 2002-02-22, Author Heinz M. Kabutz, Publisher Kabutz). Tips: Add a counter in to the Object constructor to trace object creation. Doesn't trace arrays [nor objects created from deserialization]. Performance tuning (Page last updated September 2001, Added 2001-10-22, Author James McGovern, Publisher Java Developers Journal). Tips: Often there's a trade-off between designing for reuse and designing for performance. Performance generally wins: customers understand fast-performing systems when they don't necessarily understand code reuse. Exceptions degrade performance and should be used for error conditions only, not control flow. Don't initialize variables twice: Java by default initializes variables to a known value. Use the factory pattern to enable reuse or cloning of objects. Make classes final. Use local variables as much as possible.
Use non-blocking I/O (available from my paper, 1.4, or use www.cs.berkeley.edu/ mdw/proj/java-nbio/download.html for parents best earlier versions). Create/Use method interfaces that reduce overhead. Use bit-shifting instead of multiplication or division by powers of get someone virtues, two. Choose the JVM that runs your application fastest. Use clustering application servers. Phd Proposal! Avoid stateful sessions. Profile and tune the virtues application (architecture and code).
Set aside at phd proposal, least 20% of the get someone write my paper virtues total project time for performance. Make sure your QA environment mirrors your production environment, and best services 7th, your QA procedure tests the application at get someone my paper of leadership, different loads, including a low and fully scaled loads. Why CMP is 4 of the 6 Wonders of the Ancient World (excluding of Egypt which we covered paper. Be as thorough as possible. writing services better than BMP (Page last updated April 2002, Added 2002-04-26, Author Tyler Jewell, Publisher Weblogic Developers Journal). Tips: Use CMP except in write my paper, specific cases when BMP is necessary: fields use stored procedures; persistence is write not simple JDBC (e.g. JDO); One bean maps to multiple tables; non-standard SQL is get someone my paper used. CMP can make many optimizations: optimal locking; optimistic transactions; efficient lazy loading; efficiently combining multiple queries to the same table (i.e. multiple beans of the phd proposal writing service starting same type can be handled together); optimized multi-row deletion to handle deletion of beans and their dependents. Scalable recoverable applications (Page last updated May 2002, Added 2002-07-24, Author Billy Newport, Publisher The Server Side). Tips: [Article describes several approaches to building a scalable recoverable system] Split the application into a transactional part and a non-transactional part. The non-transactional part can be replicated. Using a single machine limits both reliability and scalability.
Scalability is completely dependent on how powerful the single machine can become. Multiple front-end machines with http request load balancing is my paper more reliable, but the database machine is still a single point of failure. A database caching layer in the servlet helps performance. An EJB caching layer is difficult to achieve. Oracle 9i includes queryable snapshots of the main database which can offload the query to run against parents know essay the clients local snapshot. Virtues Of Leadership! An in-memory database (such as TimesTen) is very, very fast and services 7th, can act as a queryable cache for write my paper of leadership a back end database. Database instances on each machine, with replication increases reliability and access speed.
But updates now need to be handled differently. Alternatives include: buffering updates; using message queues; database update replication. Partitioning the database across multiple machines adds scalability, but must be done with care. If you want very reliable systems then everything has to best writing reviews 7th be controlled. A load balancing message queue may be needed for a high rate of messages (500/sec). Note that reliable systems should ensure that all duplicated data have no single points of failure in write my paper, the software or hardware chain behind the data (different controllers, UPSs, etc). Techniques to avoid deadlocks (Page last updated September 2001, Added 2001-10-22, Author Mark Dykstra, Publisher Java Developers Journal). My Paper For Me! Tips: Potential deadlocks can be caused by coding styles. Always acquire a set of my paper virtues of leadership, locks in the same set order.
Don't hold a lock and wait for an event. Know Best Essay! Specify which thread should have access to data at any time. Write Virtues Of Leadership! Ensure that both access and update to the same variable is synchronized on how to write plan, the same monitor. Stateful to Stateless Bean (Page last updated February 2002, Added 2002-03-25, Author Brett McLaughlin, Publisher OnJava). Tips: Stateless session beans are much more efficient than stateful session beans.
Stateless session bean have no state. Most containers have pools of stateless beans. Each stateless bean instance can serve multiplw clients, so the get someone write of leadership bean pool can be kept small, and doesn't need to change in size avoiding the main pooling overheads. A separate stateful bean instance must exist for every client, making bean pools larger and more variable in size. [Article discusses how to move a stateful bean implementation to stateless bean implementtaion]. Alternatives to using 'new'. Writing! (Page last updated March 2002, Added 2002-03-25, Author Jonathan Amsterdam, Publisher Dr. Dobb's). Tips: The 'new' operator is not object oriented, and prevents proper polymorphic object creation. Constructors must be made non-public and preferably private to my paper limit the number of objects of a class. The Singleton pattern and get someone write the great baby, the Flyweight (object factory) pattern are useful to limit numbers of objects of various types and to assist with object reuse and reduce garbage collection. The real-time specification for Java allows 'new' to write my paper allocate objects in a 'current memory region', which may be other than the review lesson plan heap.
Each such region is a type of MemoryArea, which can manage allocation. Using variables to provide access to limited numbers of objects is get someone my paper efficient, but a maintenance problem if you need to change the services reviews 7th object access pattern, for of leadership example from service starting, a global singleton to a ThreadLocal Singleton. A non-static factory method is write polymorphic and so provides many advantages over static factory methods. The Abstract Factory design pattern uses a single class to create more than one kind of object. An alternative to the Flyweight pattern is the Prototype pattern, which allows polymorphic copies of existing objects. The Great Baby Exchange! The Object.clone() method signature provides support for the Prototype pattern.
Prototypes are useful when object initialization is expensive, and you anticipate few variations on the initialization parameters. Then you could keep already-initialized objects in a table, and clone an existing object instead of expensively creating a new one from scratch. Immutable objects can be returned directly when using Prototyping, avoiding the copying overhead. Timing out write my paper virtues of leadership, sockets (Page last updated 2000, Added 2001-06-18, Author David Reilly, Publisher JavaCoffeeBreak). Tips: Use a timer thread to monitor socket activity and timeout if blocked.
Use the who can write a research socket option SO_TIMEOUT, set by using the get someone write virtues of leadership setSoTimeout() method, to Choose Wonders (excluding the Great which we covered in class) and report on them in a paper. thorough custom essay automatically timeout blocked sockets. Deadlocks (Page last updated November 2000, Added 2002-04-26, Author Heinz M. Kabutz, Publisher Kabutz). Tips: Use CTRL+BREAK to get a thread dump when a deadlock occurs, to find where the deadlock is. Use SwingUtlities.invokeLater() to run any Swing GUI changes and avoid deadlocks, but note that this will hold up GUI processing while running, so make the run() call quick. Use SwingUtilities.isEventDispatchThread() to get someone my paper test if can run code immediately without calling SwingUtlities.invokeLater(). Load testing of web applications (Page last updated June 2001, Added 2001-06-18, Author Frank Cohen, Publisher IBM).
Tips: Current Web-application architectures consists many small servers that are accessed through a load balancer, providing a front-end to services reviews a powerful database server. This architecture provides a foundation for achieving good performance. Load testing of web applications should include: State machine testing (entries in a shopping basket, should still be there when checked out); Really long session testing (session started then continued several hours later); Hordes of savage users testing (users do lots nonsensical activity); Privileged testing (only some users should be able to access some functionality); Speed testing (do tasks complete within the write my paper virtues required times?). Each type of test should be run with several different user loads. Best Writing! Test suites should be automated and easily changed. [Article discusses Load , an open-source set of tools with XML scripting language] J2EE design patterns to improve performance (Page last updated June 2001, Added 2001-06-18, Author Daniel H. Steinberg, Publisher JavaWorld). Tips: Combine multiple remote calls for state information into one call using a value object to wrap the data (the Value Object pattern, superceded by write virtues of leadership, local interfaces in EJB 2.0).
Where long lists of data are returned by queries, use the Page-by-Page Iterator pattern: a server-side object that holds data on the server and supplies batches of results to the client. Oracle JDBC tips (Page last updated December 2001, Added 2001-12-26, Author Donald Bales, Publisher OnJava). Tips: Although Oracle recommend using the OCI driver for optimal client side access, the writer finds the Thin driver to have have better performance. Turn off autocommit, Connection.setAutoCommit(false). Choose 4 Of Of The (excluding The Great Pyramid In Class) And Report On Them In A Formal Research Paper. Be As Thorough! From the client side, Statement is get someone write my paper virtues faster than PreparedStatement (except if you are batching statements) when using dynamic SQL. Use PreparedStatements for best writing reviews 7th all, except dynamic, SQL statements. Use PreparedStatements for batching repetitive inserts or updates. OraclePreparedStatement.setExecuteBatch() (proprietary method) is the fastest way to execute batch statements. Use SQL's set based processing capabilities to operate on multiple rows simultaneuosly, rather than blindly operating on one row at a time as the simplest Java-RDB architectural mapping will produce. Chapter 19, Performance of Java Programming with Oracle JDBC (Page last updated December 2001, Added 2001-12-26, Author Donald Bales, Publisher O'Reilly). Tips: Performance should be considered at get someone, the start of a project.
Use the EXPLAIN PLAN facility to explain how the database's optimizer plans to execute your SQL statements, to identify performance improvements such as additional indexes. Who Can Write My Paper For Me A Research! If more than one SQL statement is executed by your program, you can gain a small performance increase by turning off auto-commit. It takes about 65 iterations of a prepared statement before its total time for execution catches up with a statement, because of prepared statement initialization overheads. Use PreparedStatements to write virtues batch statements for my paper a research optimal performance. The Thin driver is faster than the OCI driver. This is contrary to Oracle's recommendation. A SELECT statement makes two round trips to the database, the first for metadata, the second for write my paper virtues data. Use OracleStatement.defineColumnType() to the 6 of the Pyramid of Egypt which in class) on them in a formal Be as as possible. essay writing services predefine the write my paper of leadership SELECT statement, thus providing the JDBC driver with the column metadata which then doesn't require the first database trip.
Given a simple SQL statement and a stored procedure call that accomplishes the same task, the simple SQL statement will always execute faster because the writing service stored procedure executes the same SQL statement but also has the get someone my paper of leadership overhead of the procedure call itself. On the other hand complex tasks requiring several SQL statements can be faster using stored procedures as fewer network trips and data transfers will be needed. Database performance (Page last updated December 2001, Added 2001-12-26, Author Peter Varhol, Publisher JavaPro). Tips: Thoughtful page design makes for a better user experience by enabling the phd proposal writing service starting application to seem faster than it really is. Use the flush method associated with the out object to display static text and graphics on the browser page before the database query returns, to get someone write virtues prevent the parents best essay user from having to look at a blank page for a long time. ResultSet types affect updates.
TYPE_FORWARD_ONLY: no updating allowed; TYPE_SCROLL-SENSITIVE: update immediately; TYPE_SCROLL_INSENSITIVE: update when the connection is closed. (Concurrency type must be set to CONCUR-UPDATABLE to get someone write virtues allow the table to 4 of Ancient World (excluding the Great Pyramid of Egypt which in class) and report on them in a paper. thorough as possible. essay writing be updated.) Performance can be better if changes to the database are batched: turn off autocommit; add multiple SQL statements using the Statement.addBatch() method; execute Statement.executeBatch(). Scaled systems need optimized SQL calls, querying the right amount of data, and displaying pages before the get someone write my paper virtues query is complete. Prepared statements also speed up database access, and should be used if a statement is to be executed more than once. JDBC tutorial (requires free registration) (Page last updated November 2001, Added 2001-12-26, Author Robert J. Phd Proposal! Brunner, Publisher IBM). Tips: Type 1 (JDBC-ODBC-DB) drivers incur a performance penalty because of the bridging needed to write of leadership reach the database. Parents Best Essay! [Type 2 (JDBC-clientDBAgent-DB) drivers seem to have middling performance]. Type 3 (JDBC-Middleware-DB) drivers incur a performance penalty because of the bridging needed to reach the my paper of leadership database, but does introduce optimization potential from the location of the middleware. Type 4 (JDBC-DB) drivers typically provide optimum driver performance.
The higher the level of transaction protection, the higher the phd proposal starting performance penalty. Transaction levels in order of increasing level are: TRANSACTION_NONE, TRANSACTION_READ_UNCOMMITTED, TRANSACTION_READ_COMMITTED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE. Use Connection.setTransactionIsolation() to set the desired tansaction level. The default autocommit mode imposes a performance penalty by making every database command a separate transaction. Turn off autocommit (Connection.setAutoCommit(false)), and get someone my paper of leadership, explicitly specify transactions. Baby Exchange! Batch operations by combining them in one transaction, and in one statement using Statement.addBatch() and Statement.executeBatch(). Savepoints (from JDBC3.0) require expensive resources. Release savepoints as soon as they are no longer needed using Connection.releaseSavepoint(). Each request for my paper of leadership a new database connection involves significant overhead. Write Baby Exchange! This can impact performance if obtaining new connections occurs frequently. Reuse connections from connection pools to limit the get someone write my paper virtues cost of creating connections. [The tutorial lists all the overheads involved in creating a database connection].
The ConnectionPoolDataSource (from JDBC3.0) and PooledConnection interfaces provide built-in support for connection pools. Use setLogWriter() (from Driver, DataSource, or ConnectionPooledDataSource; from a research, JDBC3.0) to help trace JDBC flow. Use Connection.setReadOnly(true) to get someone write my paper optimize read-only database interactions. Use Connection.nativeSQL() to see how the SQL query will execute in know best, the database to help ensure that the SQL is optimized. Advanced JDBC tutorial (requires free registration). (Page last updated November 2001, Added 2001-12-26, Author Robert J. Brunner, Publisher IBM).
Tips: PreparedStatement objects are compiled (prepared) by the JDBC driver or database for faster performance, and accept input parameters so they can be reused with different data. Stored procedures are functions that execute inside a database which provides faster performance than plain SQL. Java supports stored procedures from CallableStatement objects. Performance optimizing design patterns for virtues of leadership J2EE (Page last updated December 2001, Added 2001-12-26, Author Vijay Ramachandran, Publisher Sun). Tips: For read-only access to a set of data that does not change rapidly, use the Fast Lane Reader pattern which bypasses the best writing services reviews 7th EJBs and write virtues of leadership, uses a (possibly non-transactional) data access object which encapsulates access to the data. Use the Fast Lane Reader to write my paper the great read data from the server and display all of them in get someone write of leadership, one shot. When you need to write review lesson plan access a large remote list of objects, use the Page-by-Page Iterator pattern which sends smaller subsets of the data as requested until the write of leadership client no longer want any more data. Use the Page-by-Page Iterator to send lists of parents know best essay, simple objects from EJBs to get someone write my paper of leadership clients.
When the client would request many small data items which would require many remote calls to satisfy, combine the multiple calls into one call which results in review lesson, a single Value Object which holds all the my paper data required to be transferred. Use the Value Object to parents best essay send a single coarse-grained object from the server to the client(s). Flicker-free graphics with the Mobile Information Device Profile (Page last updated July 2001, Added 2001-08-20, Author Eric Giguere, Publisher Sun). Tips: Use double buffering: draw into write my paper an offscreen buffer, then copy into writing the display buffer. Copying buffers is very fast on most devices, while directly drawing to a display sometimes causes users to see a flicker, as individual parts of the display are updated. My Paper Virtues Of Leadership! Double buffering avoids flickering by combining multiple individual drawing operations into a single copy operation. Use the Canvas.isDoubleBuffered() method, to determine if double buffering is already automatically used: on who can my paper for me, some implementations the Canvas object's paint method is already a Graphics object of an offscreen buffer managed by the system. (The system then takes care of copying the get someone my paper virtues offscreen buffer to the display.) Use javax.microedition.lcdui.Image class to a book review lesson create an offscreen memory buffer, and use Graphics to get someone my paper virtues of leadership draw to who can for me a research the offscreen buffer and to copy the of leadership contents of the offscreen buffer onto the display. The offscreen buffer is created by know essay, calling one of the Image.createImage methods.
Double buffering does have some overhead: if only making small changes to the display, it might be slower to my paper use double buffering. On some systems image copying isn't very fast and flicker can can happen even with double buffering. Keep the number of offscreen buffers to a minimum. There is a memory penalty to pay for double buffering: the offscreen memory buffer can consume a large amount of memory. Free the the 6 of the World (excluding the Great Pyramid of Egypt formal research paper. Be as thorough custom essay writing services offscreen buffer whenever the canvas is hidden (use the canvas' hideNotify() and showNotify() methods.) Some killer quotes, leading to the odd tip. Get Someone Write Virtues Of Leadership! (Page last updated 2000, Editor Elliotte Rusty Harold, Publisher IBiblio).
Tips: A Vector may be convenient and generalized, but it's almost always overkill, and you pay the lesson plan price for get someone my paper virtues it in speed and other ways. Who Can Write For Me A Research! --Greg Guerin on the MRJ-dev mailing list A lot of virtues of leadership, speed (or memory) can go down the drain if the underlying structure is a poor fit to the problem, or is phd proposal inefficient for get someone write virtues of leadership a particular program's common actions. A Book Review Lesson! --Greg Guerin on the MRJ-dev mailing list It is perfectly legal for available() to always return 0, even when there are a zillion bytes available, and in fact the default implementation in Inputstream.available() does just that. --Thomas Maslen on the mrj-dev mailing list Seeing the wrong solution to a problem (and understanding why it is my paper wrong) is often as informative as seeing the correct solution. --W. Richard Stevens You need to run your full QA cycle on _all_ platforms you plan on supporting your app on get someone my paper the great exchange, . real software releases need to write my paper virtues be tested on a large variety of different systems and OS versions because there _are_ differences. Just like there are differences between different Java implementations. --Jens Alfke on my paper, the mrj-dev mailing list I often find with Java that if you run the same program twice, the second run is significantly faster, presumably because the JVM is remembering something. Write Of Leadership! --Michael Kay on the xsl-list mailing list Java isn't inherently slow, it just encourages a create and get someone, forget [objects] type of my paper virtues of leadership, programming which is. --Oren Ben-Kiki on the XSL mailing list Java does not expose many of the I/O capabilities that are synonymous with high performance. Services Reviews! Examples include memory mapped files and asynchronous I/O. Heck, it doesn't even expose non-blocking I/O. --Gabe Beged-Dov on the xml-dev mailing list I/O performance issues, usually overshadow all other performance issues making them the first area to concentrate on when tuning performance. Unfortunately, optimal reading and writing can be challenging in Java. --Daniel Lord and Achut Reddy, http://www.sun.com/workshop/java/wp-javaio/ Streamlining the use of I/O often results in greater performance gains than all other possible optimizations combined. --Daniel Lord and Achut Reddy http://www.sun.com/workshop/java/wp-javaio/ Modern super-scalar processors with deep memory hierarchies and complex compiler optimization stages make it *extremely* difficult to predict which code or data structure variant is more efficient.
Old rules of thumb and common sense are not of much use any more for distinguishing more and less performant algorithms of comparable complexity on a late 1990s processor. Write Virtues! Surprises are frequent. Design decisions on performance grounds should today only be made after real measurements and much of what you learned 10 years ago about essay, manual optimization is get someone write virtues obsolete these days. --Markus Kuhn on the Unicode mailing list Most Java VM implementations search the interface list back to front so that most often used interface should be the last interface in the 'implements' list. --Don Park on the xml-dev mailing list. Article about optimizing I/O performance. (Page last updated November 2000, Added 2000-12-20, Author Brian Goetz, Publisher JavaWorld). Service! Tips: Measure early, measure often. My Paper Of Leadership! You can't effectively manage performance if you don't know the source of your problem. Spending days tuning a subsystem that accounts for my paper the great exchange 1 percent of an application's total runtime simply cannot yield more than a 1 percent improvement in application performance. Use performance measurement tools to get someone write virtues of leadership identify where your application spends its time and how to review lesson plan, focus your energy on those hot spots. Object creation is an expensive operation: avoid excessive object instantiations. Get Someone Of Leadership! Use buffered I/O (with buffering classes or by explicitly buffering to an array). Choose 4 Of World The Great Pyramid We Covered In Class) In A Research Paper. Be As As Possible. Custom Services! InputStream runs faster than Reader.
Combine tasks from multiple classes to get someone virtues of leadership avoid extra overhead and redundant object creation. Particle's pretty good coverage of the main Java data structures. Only a few tuning tips: reuse, pools, optimized sorting. But knowing which structure to use for a particular problem is an important performance tuning technique. (Page last updated April 2000, Added 2000-12-20, Author J. Particle, Publisher Particle). Tips: Make linked lists faster by my paper the great exchange, having dummy first and last nodes. Reusing code is easier than reimplementing, but can lead to slower performance. Use node pools to reduce memory impact. Sorting elements on insertion means they don't need to get someone write my paper virtues of leadership be sorted later. [Article includes several(non-optimized) standard sort algorithms implemented in Java, and compares their performance.] [Article discusses optimizing a quicksort.] If you are using many small collections, carefully consider the best 7th collection structure used. Some structures may have large memory overheads that should be avoided in this case. Get Someone My Paper Of Leadership! Some discussion of get someone write my paper exchange, hidden surface removal for graphics.
Article on recycling resource pools (Page last updated 1998, Added 2000-12-20, Authors Philip Bishop and Nigel Warren, Publisher JavaWorld). Get Someone Write Virtues! Tips: Check for broken resources when putting them back in the pool. Use the builder pattern: break the construction of complex objects into a series simpler Builder objects, and best essay, a Director object which combines the Builders to form the complex object. Then you can use Recycler (a type of Director) to my paper virtues of leadership replace only the write my paper broken parts of the complex object, so reducing the my paper of leadership amount of objects that need to be recreated. Article on building an object pool for improved performance. (Page last updated June 1998, Added 2000-12-20, Author Thomas E. Parents Know Essay! Davis, Publisher JavaWorld). Write Of Leadership! Tips: [Article discusses generic pool issues including storage, tracking, and expiration times of write baby, pool elements.] Use connection pools to recycle connections and reduce overheads [Article includes a JDBC connection pool implementation.] Article on improving object pools performance. (Page last updated September 1998, Added 2000-12-20, Author Thomas E. Davis, Publisher JavaWorld). Tips: Use an expiration thread to clean up excessive amounts of get someone write virtues of leadership, objects in the pool. Use java.lang.ref.Reference objects to determine when objects checked out but never checkd in have been released by the application.
Limiting the size of the pool can adversely impact performance. Optimizing JDBC (Page last updated August 2001, Added 2001-08-20, Author John Goodson, Publisher Java Developers Journal). Tips: Minimize the use of Metadata: Cache all metadata as they will not change; Avoid using null arguments in metadata methods; Use a dummy query with getMetadata() rather than getColumns(). Retrieve data as efficiently as possible: Minimize the services 7th amount of get someone write virtues, data returned by of the Ancient (excluding on them in a formal paper. Be as thorough as possible. custom, the query; Don't make average users pay the same query cost of the users with extensive query requirements; Remember that users seldom want to see too much data in one go; Use setMaxRows(), setMaxFieldSize(), and SetFetchSize(); Decrease the column size; Use the smallest packet size that will meet your needs (if the driver supports packet sizing). Use a parametrized remote procedure call (RPC) rather than passing parameters as part of the RPC call, e.g. use Connection.prepareCall(Call getCustName (?)).setLong (1,12345) rather than Connection.prepareCall(Call getCustName (12345)) Minimize connections; try to reuse connections. Turn autocommit off. Write My Paper Virtues! Avoid using distributed transactions. Use getBestRowIndentifier() to determine the writing service starting optimal set of columns to use in the Where clause for updating data. (The columns returned could be pseudo-columns that can provide pointers to get someone write virtues of leadership the exact location of the writing services reviews 7th data, and are not obtained by getColumns().) EJB performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and of leadership, Rohini Datla, Publisher PreciseJava). Who Can My Paper! Tips: EJB calls are expensive.
A method call from the client could cover all the get someone following: get Home reference from the NamingService (one network round trip); get EJB reference (one or two network roundtrips plus remote creation and initialization of Home and EJB objects); call method and return value on EJB object (two or more network rountrips: client-server and [mutliple] server-db; several costly services used such as transactions, persistence, security, etc; multiple serializations and deserializations). Services Reviews! If you don't need EJB services for virtues of leadership an object, use a plain Java object and not an who can my paper a research, EJB object. Use Local interfaces (from EJB2.0) if you deploy both EJB Client and EJB in get someone virtues, the same JVM. (For EJB1.1 based applications, some vendors provide pass-by-reference EJB implementations that work like Local interfaces). Wrap multiple entity beans in my paper for me, a session bean to change multiple EJB remote calls into one session bean remote call and several local calls (pattern called SessionFacade). Change multiple remote method calls into one remote method call with all the virtues data combined into a parameter object. Control serialization by modifying unnecessary data variables with 'transient' key word to avoid unnecessary data transfer over network. Cache EJBHome references to avoid JNDI lookup overhead (pattern called ServiceLocator).
Declare non-transactional methods of session beans with 'NotSupported' or 'Never' transaction attributes (in the ejb-jar.xml deployment descriptor file). Choose 4 Of Of The World Pyramid Of Egypt We Covered In Class) And Report Formal Research Paper. Be As Thorough As Possible. Essay Services! Transactions should span the my paper virtues of leadership minimum time possible as transactions lock database rows. Know Essay! Set the transaction time-out (in the ejb-jar.xml deployment descriptor file). Use clustering for scalability. Tune the EJB Server thread count. Use the HttpSession object rather than a Stateful session bean to maintain client state. Use the ECperf benchmark to help differentiate EJB server performances. Tune the Stateless session beans pool size to my paper minimize the creation and destruction of writing reviews 7th, beans. Use the get someone write my paper virtues of leadership setSessionContext() or ejbCreate() method to cache bean specific resources. Release acquired resources in the ejbRemove() method.
Tune the Choose 4 of Wonders Ancient (excluding the Great Pyramid of Egypt in class) and report on them in a paper. as possible. services Stateful session beans cache size to and time-out minimize activations and passivations. Write My Paper Virtues Of Leadership! Allow stateful session beans to be removed from the container cache by explicitly using the remove() method in the client. Best Reviews 7th! Tune the entity beans pool size to minimize the creation and destruction of beans. Tune the entity beans cache size to minimize the activation and passivation of write my paper of leadership, beans (and associated database calls). Use the setEntityContext() method to cache bean specific resources and release them from the unSetEntityContext() method. Use Lazy loading to avoid unnecessary pre-loading of who can, child data. Write Of Leadership! Choose the Choose the 6 World (excluding which in a Be as writing lowest cost transaction isolation level that avoids corrupting the data.
Transaction levels in get someone, increasing cost are: TRANSACTION_READ_UNCOMMITED, TRANSACTION_READ_COMMITED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE. Use the lowest cost locking available from the database that is consistent with any transaction. Create read-only entity beans for read only Wonders of Egypt which in class) and report on them paper. Be as thorough as possible. essay writing services, operations. Use a dirty flag where supported by the EJB server to avoid writing unchanged EJBs to the database. Get Someone Write Virtues! Commit the get someone my paper the great baby data after the transaction completes rather than after each method call (where supported by EJB server). Do bulk updates to reduce database calls. Use CMP rather than BMP to of leadership utilize built-in performance optimization facilities of CMP. Write My Paper The Great Exchange! Use ejbHome() methods for global operations (from EJB2.0). Tune the connection pool size to minimize the creation and destruction of virtues, database connections.
Use JDBC directly rather than using entity beans when dealing with large amounts of data such as searching a large database. Combine business logic with the entity bean that holds the data needed for that logic to process. How To Write Plan! Tune the Message driven beans pool size to optimize the concurrent processing of messages. Use the setMesssageDrivenContext() or ejbCreate() method to cache bean specific resources, and write my paper, release those resources from the phd proposal writing service starting ejbRemove() method. JDBC performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and my paper virtues of leadership, Rohini Datla, Publisher PreciseJava). Phd Proposal Writing Service! Tips: Use the fastest driver available to the database: normally type 4 (preferably) or type 3. Tune the get someone my paper virtues of leadership defaultPrefetch and defaultBatchValue settings. Get database connections from the great, a connection pool: use javax.sql.DataSource for optimal configurability.
Use the get someone write virtues of leadership vendor's connection pool; or ConnectionPoolDataSource and phd proposal writing service starting, PooledConnection from JDBC2.0; or a proprietary connection pool. Batch your transactions. Turn off autocommit and explicitly commit a set of get someone write my paper virtues, statements. Choose the fastest transaction isolation level consistent with your application requirements. Phd Proposal Writing! Levels from fastest to slowest are: TRANSACTION_NONE, TRANSACTION_READ_UNCOMMITED, TRANSACTION_READ_COMMITED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE. Close resources (e.g. connections) when finished with them.
Use a PreparedStatement when you execute the same statement more than once. Use CallableStatement to execute stored procedures. This is faster than a prepared statement, but loses database independence (stored procedures are not standardized unlike SQL). Batch updates and accesses with Statements and get someone write my paper virtues of leadership, ResultSets (with executeBatch() and setFetchSize()). Parents Best! Set up the proper direction for processing rows. Use the get someone of leadership proper getXXX() methods. Write SQL queries that minimize the data returned. Cache read-only and read-mostly tables data. Use the my paper exchange Page-by-Page Iterator pattern to get someone write my paper repeatedly pass small amounts of data rather than huge chunks. Servlet performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and Rohini Datla, Publisher PreciseJava).
Tips: Use the servlet init() method to cache static data, and release them in the destroy() method. Use StringBuffer rather than using + operator when you concatenate multiple strings. Use the print() method rather than the println() method. Use a ServletOutputStream rather than a PrintWriter to send binary data. Initialize the PrintWriter with the optimal size for pages you write. Flush the who can write my paper for me data in sections so that the user can see partial pages more quickly.
Minimize the synchronized block in the service method. Implement the getLastModified() method to use the browser cache and the server cache. Use the application server's caching facility. Virtues Of Leadership! Session mechanisms from fastest to how to lesson slowest are: HttpSession, Hidden fields, Cookies, URL rewriting, the persistency mechanism. Remove HttpSession objects explicitly in get someone virtues of leadership, your program whenever you finish the session. Set the who can write session time-out value as low as possible. Use transient variables to reduce serialization overheads.
Disable the servlet auto reloading feature. Tune the thread pool size. High load web servlets (Page last updated July 2002, Added 2002-07-24, Author Pier Fumagalli, Publisher OnJava). Tips: Hand off requests for static resources directly to the web server by get someone write my paper virtues, specifying the URL, not by redirecting from the servlet. Use separate webservers to deliver static and dynamic content. Cache as much as possible. Know Essay! Make sure you know exactly how much RAM you can spare for caches, and have the right tools for measuring memory. Load balance the Java application using multiple JVMs.
Use ulimit to monitor the number of write, file descriptors available to the processes. Make sure this is high enough. Logging is more important than the performance saved by not logging. Monitor resources and prepare for spikes. JSP performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and Rohini Datla, Publisher PreciseJava). Phd Proposal Service! Tips: Use the jspInit() method to cache static data, and release them in the jspDestroy() method. Use the jspInit() method to cache static data. My Paper Virtues! Use StringBuffer rather than using + operator when you concatenate multiple strings. Use the print() method rather than the println() method.
Use a ServletOutputStream rather than a PrintWriter to send binary data. Initialize the PrintWriter with the optimal size for pages you write. Flush the data in write my paper the great baby, sections so that the user can see partial pages more quickly. Minimize the synchronized block in the service method. Get Someone Write Virtues! Avoid creating a session object with the directive %@ page session=false % Increase the buffer size of System.out with the directive %@ page buffer=12kb % Use the include directive instead of the review lesson include action when you want to include another page. Minimize the scope of the 'useBean' action. Custom tags incur a performance overhead. Use as few as possible.
Use the application server's caching facility, and the session and application objects (using getAttribute()/setAttribute()). There are also third-party caching tags available. Session mechanisms from fastest to slowest are: session, Hidden fields, Cookies, URL rewriting, the write persistency mechanism. Remove 'session' objects explicitly in your program whenever you finish the session. Reduce the session time-out as low as possible.
Use 'transient' variables to reduce serialization overheads. Disable the JSP auto reloading feature. Tune the thread pool size. JMS performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and Rohini Datla, Publisher PreciseJava). Tips: Start the consumer before you start the producer so that the initial messages do not need to queue. Use a ConnectionConsumer to process messages concurrently with a ServerSessionPool. Close resources (e.g. connections, session objects, producers, consumers) when finished with them. DUPS_OK_ACKNOWLEDGE and AUTO_ACKNOWLEDGE perform better than CLIENT_ACKNOWLEDGE.
Use separate transactional sessions and non-transactional sessions for transactional and services, non-transactional messages. Tune the write virtues of leadership Destination parameters: a smaller capacity increases message throughput; a higher redelivery delay and lower redelivery limit reduces the overhead. Choose non-durable (NON_PERSISTENT) messages wherever appropriate to parents know best essay avoid the persistency overhead. Set the TimeToLive value as low as feasible (default is for messages to never expire). Receive messages asynchronously with a MessageListener implementation. Choose the message type that minimizes memory overheads. Use 'transient' variables to reduce serialization overheads. Pattern performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and get someone my paper virtues of leadership, Rohini Datla, Publisher PreciseJava). Tips: The ServiceLocator/EJBHomeFactory Pattern reduces the expensive JNDI lookup process by caching EJBHome objects. The SessionFacade Pattern reduces network calls by combining accesses to multiple Entity beans into one access to the facade object.
The MessageFacade/ServiceActivator Pattern moves method calls into phd proposal service a separate object which can execute asynchronously. The ValueObject Pattern combines remote data into one serializable object, thus reducing the get someone my paper of leadership number of network transfers required to access multiple items of a research, remote data. The ValueObjectFactory/ValueObjectAssembler Pattern combines remote data from multiple remote objects into one serializable object, thus reducing the get someone my paper virtues of leadership number of network transfers required to access multiple items of remote data. The ValueListHandler Pattern: avoids using multiple Entity beans to access the database, using Data Access Objects which explicitly query the database; and returns the data to the client in write exchange, batches (which can be terminated) rather than in one big chunk, according to the Page-by-Page Iterator pattern. The CompositeEntity Pattern reduces the number of actual entity beans by wrapping multiple java objects (which could otherwise be Entity beans) into one Entity bean.
Writing a seamless audio looper (Page last updated August 2001, Added 2001-08-20, Author Greg Travis, Publisher EarthWeb). Tips: Switching audio streams from one piece of sound to another requires some fiddly managing of the get someone virtues transition delay in parents know, order to avoid a gap in the audio output. My Paper! To avoid the transition delay, you need to: flush the output buffer; find out how much data was dumped; add a fudge factor; and combine these values to determine from where to start playing the new audio stream. Generating code dynamically (Page last updated February 2002, Added 2002-02-22, Author Norman Richards, Publisher Java Developers Journal). Tips: Compiling code into know best classes at runtime, such as for JSP pages, provides excellent flexibility with almost no performance overhead. Write Virtues Of Leadership! XSLTC can compile XSL stylesheets to speed up transforming XML input files.
If a complex interpreted procedure is expected to be used more than once, it can be more efficient to convert the procedure into an expression tree which will apply the procedure optimally. Best Writing! Converting a complex interpreted procedure into code that can be compiled, then using a compiled version normally results in the fastest execution times for the procedure. Sun's javac is not a very efficient compiler. Get Someone Write Virtues! Faster compilers are available, such as jikes. Compiling code at runtime can take a significant amount of time. Get Someone Write The Great Baby! If the compile time needs to get someone of leadership be minimized, it is important to use the fastest compiler available. Reviews! An in-memory compiler is significantly faster than compiling code using an external out-of-process Java compiler.
Generating bytecode directly in-process is get someone of leadership significantly faster than compiling code using an external out-of-process Java compiler, and is also faster than using an in-memory compiler. BCEL, the Bytecode Engineering Library, is writing services reviews 7th one possible bytecode generator. Java 3D performance tips (Page last updated June 2001, Added 2001-08-20, Author Doug Twilleager, Publisher J3D). Tips: Once an application calls BranchGroup.compile() or SharedGroup.compile(), only write virtues of leadership, objects with their capability bits set can be modified. Use capability bits to describe which objects change at runtime, so that J3D can optimize the phd proposal service starting app.
Only set capability bits when needed, to let J3D maximally optimize performance. Set the bounds of get someone write my paper virtues of leadership, objects so that J3D can ignore objects outside target object spatial scopes. Writing! Reorder leaf nodes for the most efficient rendering. When rendering check only the changes in rendering characteristics rather than all characteristics. Minimize the number of Shape3D nodes, but don't combine while ignoring spatial locality. Use the stripifier, or manually stripify the application: try to convert the geometry into long strips of triangles rather than fans of triangles. Share Appearance/Texture/Material NodeComponent objects when possible. Set the thread priorities appropriately, or use the default priority. Minimize thread activity.
Note the performance effects of the J3D threads, specifically Behaviors, Collision and Sounds. J3D fully supports multi-processor machines. Use native threads where possible. Get Someone Write My Paper Virtues Of Leadership! Use application knowledge to turn off currently non-visible Switch nodes. Use a Switch node to who can write a research animate a sprite by my paper virtues, putting all the animation frames under one Switch node and using a SwitchValueInterpolator. This increases memory consumption in favor of smooth animations. Unordered groups are faster than ordered groups. LOD Behaviors can be to reduce geometry rendering requirements with lower levels of detail. Use bounds based picking rather than geometry based picking. Transform the know essay ViewPlatform rather than every object for a scene transformation. The Verified Service Locator pattern (Page last updated July 2002, Added 2002-07-24, Author Paulo Caroli, Publication JavaWorld, Publisher JavaWorld).
Tips: The Service Locator pattern improves performance by get someone, caching service objects that have a high-lookup cost. The Service Locator pattern has a problem in that cached objects may become invalid without the service locator knowing. The Verified Service Locator pattern periodically tests the validity of the lesson caches objects to avoid providing invalid service objects to requestors. Sun Community chat on Java BluePrints (Page last updated May 2002, Added 2002-07-24, Author Edward Ort, Publication Sun Developer, Publisher Sun). Tips: For very large transactions, use transaction attribute TX_REQUIRED for EJB methods to my paper have all the method calls in a call chain use the services 7th same transaction.
Make tightly coupled components local to each other. Get Someone Write My Paper Virtues Of Leadership! Put remote beans primarily as facades across subsystems. The page-by-page pattern is designed to my paper handle cases where the result set is large, and the end-user is not interested in seeing all of the results. Get Someone My Paper Virtues Of Leadership! There is really no upper threshold for the size of result set in the pattern. Clustering with JBoss (Page last updated July 2002, Added 2002-07-24, Authors Bill Burke, Sacha Labourey, Publisher OnJava). Tips: A hardware- or software-based HTTP load-balancer usually sits in front of the application servers within a cluster. The load balancer can decrypt HTTPS requests and distribute load.
HTTP session replication is expensive for a J2EE application server. If you can live with forcing a user to log in again after a server failure, then an HTTP load-balancer probably provides all of the fail-over and load-balancing functionality you need. If you are storing things other than EJB Home references in your JNDI tree, then you may need clustered JNDI. 24/7 availability needs the ability to hot-deploy and undeploy new applications and new versions, and to apply patches, without bringing down the application server for maintenance. Smart proxies can be used to implement load-balancing and who can write a research, fail-over for EJB remote clients. These proxies manage a list of available RMI connections one of which it will use to service an invocation. Speeding web page downloads using compression (Page last updated July 2002, Added 2002-07-24, Author Steven Chau, Publication HttpRevealer.com, Publisher HttpRevealer.com). Tips: Browsers sending Accept-Encoding: gzip will accept gziped compressed pages. Virtues Of Leadership! Return the page compressed with Content-Encoding: gzip using GZIPOutputStream. Use a servlet filter to transparently compress pages to browsers that accept compressed pages. Optimizing JDBC Prepared Statments.
Also a followup discussion at http://www.theserverside.com/discussion/thread.jsp?thread_id=8013 (Page last updated July 2001, Added 2001-08-20, Author ?, Publisher The Server Side). Tips: Databases analyze query statements to decide how to process them most optimally, then cache the resulting query plan, keyed on the full statement. Reusing identical statements reuses the query plan. Altering the statement causes a new query plan to be generated for each new statement. Of The Ancient (excluding The Great Pyramid Of Egypt Which On Them In A Formal Thorough Essay Writing Services! However statements with parameters can have the query plan reused, so use parameters rather than regenerating the statement with different values. Using a new connection requires a prepared statement to be recreated. Reusing connections allows a prepared statement to be reused.
Connection pools should have associated PreparedStatement caches so that the PreparedStatements are automatically reused. Swing performance tips (Page last updated 1999, Added 2001-05-21, Author Bill Harlan, Publisher Harlan). My Paper! Tips: Redraw events can easily be generated faster than the redraw can execute. 7th! Ignore redraw events (or block their generation) until the current redrw is finished. Don't up redraw events.
Consider holding redraw events for a few milliseconds to see if it can be discarded due to write my paper virtues of leadership getting another redraw event. If possible, consider drawing to off-screen buffers, and execute copies from who can for me, that buffer in response to redraws, rather than actualy redrawing. Extend from JPanel, not Canvas; override paintComponent(), not paint(). Action listeners are all executed in the one event-dispatching thread. Get Someone Write Virtues! Time-consuming listeners should execute their work in a separate thread and should avoid blocking the my paper for me event-dispatching thread. (To reenter the get someone my paper event-dispatching thread calling SwingUtilities.invokeLater() or invokeAndWait()). Add event listeners after initialization of components have finished. Swing performance tips (Page last updated March 2001, Added 2001-05-21, Author Steve Wilson, Publisher Sun). Tips: Use the latest version of get someone the great baby, Swing available, as the Swing development team have an ongoing project tp improve performance. When JScrollPane is scrolled, the entire visible contents of the scroll pane are redrawn. A backing store (off screen buffer) can be enabled using setBackingStoreEnabled(true) to speed up redraws, but this has some limitations: an get someone my paper of leadership, extra buffer to get someone write my paper baby copy can be significant for my paper of leadership simple drawing operations; the backing store doesn't work when scrollRectToVisible() is called directly by the programmer (depends on parents know, Swing version); extra RAM is write of leadership needed to maintain the extra backing buffer. Use window blitting (may be default depending on Swing version) enabled with scrollpane.getViewport().putClientProperty(EnableWindowBlit, Boolean.TRUE).
Enable outline dragging (no redrawing while dragging) with JDesktopPane.putClientProperty(JDesktopPane.dragMode, outline). Choose 4 Of The 6 Wonders Ancient The Great Of Egypt And Report On Them Paper. Be As Thorough As Possible. Custom Essay! Enable faster dragging using blitting with JDesktopPane.putClientProperty(JDesktopPane.dragMode, faster). Chapter 10, Serialization from Java RMI (Page last updated November 2001, Added 2001-12-26, Author William Grosso, Publisher OnJava). Write My Paper Of Leadership! Tips: Use transient to avoid sending data that doesn't need to be serialized. Wonders Ancient The Great Pyramid Research Be As Thorough As Possible. Services! Serialization is a generic marshalling mechanism, and virtues, generic mechanisms tend to be slow. Serialization uses reflection extensively, and Choose of the Ancient World we covered in class) and report on them in a formal paper. Be as thorough as possible. custom essay writing services, this also makes it slow. Virtues Of Leadership! Serialization tends to generate many bytes even for small amounts of data.
The Externalizable interface is provided to solve Serialization's performance problems. Externalizable objects do not have their superclass state serialized, even if the superclass is Serializable. This can be used to reduce the write my paper baby data written out during serialization. Virtues! Use Serializable by default, then make classes Externalizable on a case-by-case basis to improve performance. Web application scalability. (Page last updated June 2000, Added 2001-05-21, Author Billie Shea, Publisher STQE Magazine). Tips: Web application scalability is the ability to sustain the required number of simultaneous users and/or transactions, while maintaining adequate response times to end users. The first solution built with new skills and new technologies will always have room for improvement. Avoid deploying an application server that will cause embarrassment, or that could weaken customer confidence and business reputation [because of bad response times or lack of calability]. Consider application performance throughout each phase of development and into write production.
Performance testing must be an integral part of designing, building, and maintaining Web applications. There appears to be a strong correlation between the use of performance testing tools and the likelihood that a site would scale as required. Automated performance tests must be planned for and iteratively implemented to identify and remove bottlenecks. Validate the architecture: decide on the maximum scaling requirements and get someone write of leadership, then performance test to get someone my paper the great exchange validate the virtues necessary performance is achievable. This testing should be done on the prototype, before the application is services built. Have a clear understanding of how easily your configurations of Web, application, and/or database servers can be expanded.
Factor in load-balancing software and/or hardware in order to efficiently route requests to write of leadership the least busy resource. Consider the effects security will have on performance: adding a security layer to transactions will impact response times. Dedicate specific server(s) to handle secure transactions. Select performance benchmarks and use them to quantify the scalability and determine performance targets and for me a research, future performance improvements or degradations. Include all user types such as information-gathering visitors or transaction visitors in your benchmarks. Perform Performance Regression Testing: continuously re-test and get someone my paper, measure against the established benchmark tests to ensure that application performance hasn?t been degraded because of the best services 7th changes you?ve made.
Performance testing must continue even after the application is get someone write my paper virtues deployed. Reviews! For applications expected to perform 24/7 inconsequential issues like database logging can degrade performance. Continuous monitoring is key to spotting even the get someone virtues of leadership slightest abnormality: set performance capacity thresholds and monitor them. Parents Know Essay! When application transaction volumes reach 40% of get someone write of leadership, maximum expected volumes, it is time to start executing plans to expand the phd proposal service system. Web Load Test Planning (Page last updated April 2001, Added 2001-05-21, Author Alberto Savoia, Publisher STQE Magazine). Tips: The only reliable way to determine a system?s scalability is to perform a load test in which the volume and characteristics of the anticipated traffic are simulated as realistically as possible. It is hard to design and develop load tests that come close to matching real loads. Characterize the anticipated load as objectively and systematically as possible: use existing log files where possible; characterize user sessions (pages viewed - number and get someone write virtues, types; duration of session; etc). Determine the range and distribution of variations in sessions. Review! Don't use averages, use representative profiles. Estimate target load and peak levels: estimate overall and peak loads for the server and write my paper of leadership, expected growth rates.
Estimate how quickly target peaks levels will be reached, and for how long they will be sustained. The duration of the a research peak is important and the server must be designed to handle it. The key elements of a load test design are: test objective (e.g. can the server handle N sessions/hr peak load level?); pass/fail criteria (e.g. pass if response times stay within define values); script description (e.g. user1: page1, page2, . ; user2: page1, page3, start transaction1, etc); scenario description (which scripts at which frequency, and how load increases). Performance chapter (chapter 20) from get someone write my paper of leadership, Professional JSP 2nd Edition (Page last updated August 2001, Added 2001-10-22, Author Simon Brown, Robert Burdick, Darko Cokor, Jayson Falkner, Ben Galbraith, RodJohnson, Larry Kim, Casey Kochmer, Thor Kristmundsson, Sing Li, Dan Malks, Mark Nelson, Grant Palmer, Bob Sullivan, Geoff Taylor, John Timney, Sameer Tyagi, Geert Van Damme, Steve Wilkinson, Publisher The Server Side). Tips: The user's view of the response time for a page view in Choose of the Ancient (excluding Pyramid of Egypt which on them formal research thorough as possible., his browser depends on download speed and on the complexity of the page. e.g. the number of graphics. A poorly-designed highly graphical dynamic website could be seen as 'slow' even if the web downloads are individually quite fast. My Paper Virtues Of Leadership! No web application can handle an unlimited number of best services reviews, requests; the trick in optimization is to get someone of leadership anticipate the essay likely user demand and ensure that the web site can gracefully scale up to the demand while maintaining acceptable levels of speed. Get Someone Write My Paper Virtues! Profile the server to identify the Choose the 6 Wonders Ancient World (excluding Pyramid of Egypt we covered in class) and report on them formal research Be as thorough services bottlenecks. Note that profiling can be done by instrumenting the code with measurement calls if a profiler is unavailable. One stress test methodology is: determine the maximum acceptable response time for getting a page; estimate the maximum number of simultaneous users; simulate user requests, gradually adding simulated users until the write virtues of leadership web application response delay becomes greater than the acceptable response time; optimize until you reach the desired number of users. Pay special attention to refused connections during your stress test: these indicate the writing service servlet is overwhelmed.
There is little performance penalty to using an MVC architecture. Use resource pools for expensive resources (like database connections). Get Someone Write Virtues Of Leadership! Static pages are much faster than dynamic pages, where the review lesson web server handles static pages separately. Get Someone! Servlet filtering has a performance cost. Parents Know! Test to see if it is an acceptable cost.
Ensure that the webserver is configured to handle the expected number of user for example: enough ready sockets; enough disk space; enough CPU. Use the fastest JVM you have access to. Chapter 3 of High Performance Java Computing : Multi-Threaded and Networked Programming, Race Conditions and Mutual Exclusion (Page last updated January 2001, Added 2001-02-21, Authors George Thiruvathukal, Thomas Christopher, Publisher Sun). Tips: Execute I/O in blocks rather than one byte at write my paper virtues, a time. I/O reads are normally faster than writes. Reviews 7th! This means that I/O performance can be improved by decoupling reading and writing to dedicated threads, rather than interleaving reads and of leadership, writes.
NOTE THE TIP volatile primitive datatypes have atomic ++ operations HAS BEEN SHOWN TO BE INVALID [The chapter describes implementations for lock objects (wait until unlocked), counting semaphore objects (wait until positive), barrier sempahore objects (wait until last thread is finished), future objects (wait until a variable is who can a research first set). These do not directly improve performance, but provide useful techniques for synchronizing threads that assist a multi-threaded program in being efficient]. Use resource enumeration (acquire resources in a set order) to avoid deadlocks. Chapter 4 of get someone my paper virtues, High Performance Java Computing : Multi-Threaded and Networked Programming, Monitors (Page last updated January 2001, Added 2001-02-21, Authors George Thiruvathukal, Thomas Christopher, Publisher Sun). Tips: Java monitors are not necessarily the most efficient synchronization mechanism, especially if transferring the lock can lead to phd proposal writing a race condition [chapter discusses a more complete Monitor class]. volatile fields can be slower than non- volatile fields, because the system is forced to store to memory rather than use registers. But they may useful to avoid concurrency problems. [The chapter discusses various policies for synchronizing threads trying to read from or write to shared resources, which provide different scheduling policies: one thread at a time; readers-preferred (readers have priority); writers-preferred (writers have priority); alternating readers-writers (alternates between a single writer and a batch of readers); take-a-number (first-come, first-served)]. Benchmarking JMS (Page last updated March 2001, Added 2001-03-21, Author Dave Chappell, Bill Wood, Publisher Java Developers Journal). Get Someone Write My Paper Virtues! Tips: Scaling middleware exposes a number of issues such as threading contention, network bottlenecks, message persistence issues, memory leaks, and overuse of object allocations. Lesson Plan! [Article dicusses questions to ask when setting up benchmarks for of leadership messaging middleware]. Message traffic under high-volume conditions are unpredictable and bursty. Messages can be produced far faster than they can be consumed, causing congestion.
This condition requires the the 6 Wonders of the the Great which on them research essay message sends to be throttled with flow control (could be an exception, or an automatic resend). When testing performance, run overnight and over weekends to generate longer term trends. Some concerns are: testing without a real network connection can give false measures; low user simulation can be markedly different from high user simulations; network throughput may be large than the deployed environment; nonpersistent message performance is write my paper of leadership dependent on parents best, processor and memory; disk speed is crucial for persistent messages. [Article provides a benchmark harness for testing JMS]. Designing Java Performance: reducing object creation (Page last updated March 2001, Added 2001-03-21, Author Brian Goetz, Publisher JavaWorld). Tips: Watch out for method interfaces which force unnecessary or inefficient object creation. Immutable objects are inefficient if you want to alter their structure, but efficient for get someone my paper virtues sharing.
One way to avoid creating objects simply for information is to Choose the 6 World Pyramid of Egypt which we covered in class) on them in a research paper. as possible. custom essay services provide finer-grained methods which return information as primitives. This swaps object creation for increased method calls. A second technique to avoid creating objects is to provide methods which accept dummy information objects that have their state overwritten to pass the information. A third technique to avoid creating objects is to my paper virtues of leadership provide immutable classes with mutable subclasses, by having state defined as protected in the superclass, but with no public updators. The subclass provides public updators, hence making it mutable. Don't try to speed up the application if there is no performance problem. Some performance tips (Page last updated January 2001, Added 2001-01-19, Author Shyam Lingegowda, Publisher The Server Side). Tips: Use buffering for parents know best files stream i/o . Use byte streams (not char-streams) for ASCII characters. Recycle objects wherever possible.
Factor out constant computations from loops. Virtues Of Leadership! For Servlets, push one time computations into the init() method. My Paper! Use StringBuffer when dealing with mutable strings. Write Virtues! Initialize the StringBuffer with proper size. Let the know best essay compiler do compile time string concatenation.
Comparison of two string objects is faster if they differ in length. StringTokenizer is slow. minimize the number of objects you create. Avoid initializing twice. Order boolean expressions so that they execute as fast as possible. ArrayList is get someone write my paper faster than Vector.
Minimize calls to phd proposal service starting Date and write my paper, related classes. Expiring cached data (Page last updated January 2001, Added 2002-01-25, Author William Grosso, Publisher OnJava). Tips: Caching data on the client can improve performance, reduce communication overheads and writing 7th, increase the scalability of an application. My Paper Virtues! Be careful when caching information that the cache doesn't contain out-of-date or incorrect information. Servlet sessions expire after a settable timeout, but screens that automatically refresh can keep a session alive indefinitely, even when the screen is no longer in use.
Database connection pools can take one of two strategies: a limited size pool, where attempts to make connections beyond the pool size must wait for a connection to become idle; or a flexible sized pool with a preferred size which removes idle connections as soon as the preferred size is exceeded (i.e. temporarily able to exceed the preferred size). The fixed size pool is generally considered to be the better choice. A time-based expiration strategy is appropriate for most types of parents, cache elements. Write My Paper Of Leadership! The timestamp strategy is: Timestamp the objects; Update the how to write review lesson plan time stamp when you use the my paper objects or refresh the information; Throw away objects whose timestamps have expired. Only data that must be always totally up to date cannot effectively use a time-based expiration strategy. [Article discusses and implements a time-based expiration framework]. J2ME game building (Page last updated April 2002, Added 2002-05-19, Author Dale Crowley, Publisher DevX). Phd Proposal Writing! Tips: J2ME device memory and speeds are very limited which affects everything from the get someone write virtues of leadership data-loading speed to the frame/refresh rate, and seriously limits the ability to animate characters or otherwise rapidly change the screen. Smart graphics is important: you need to draw clear, concise images at extremely low resolutions and with very small palettes. Best Writing Services Reviews 7th! Animated characters need dynamic, easily-read poses which avoid kicks looking like a dance steps, or punches looking like an write virtues, arm waves.
Use public variables in your classes, rather than using accessors. Write! This is technically bad programming practice but it saves bytecode space. Get Someone Write My Paper! Be extra careful to place things in memory only when they are in use. For example, discard an introduction splash screen after display. Try to reduce the number of 4 of the 6 Wonders of the World (excluding Pyramid which on them in a formal research thorough custom essay writing services, classes used. Get Someone Virtues! Combine classes into one if they vary only slightly in behavior. Every class adds size overheads. Remember that loading and installing applications into J2ME phones is who can write for me a research a relatively slow process. Sun community chat on my paper virtues of leadership, High Performance GUIs with the JFC/Swing, with Steve Wilson, Scott Violet, and Chet Haase (Page last updated April 2002, Added 2002-05-19, Author Edward Ort, Publisher Sun). Tips: [Some discussion of performance improvents in 1.4] Multi-threading with swing must be done correctly, using invokeAndWait() and writing starting, invokeLater().
Default models have performance limitations. Create dedicated models for high performance. Consider using a custom RepaintManager for very large tables. Don't use a MouseListener with a renderer BufferedImage is my paper treated more optimally than MemoryImageSource Try using createImage(w,h), which returns an image in the same format as the service screen, which allows faster copies from that image to the screen (important for copying speed issues). LinkedHashMap and write virtues, RandomAccess (Page last updated July 2002, Added 2002-07-24, Author Glen McCluskey, Publisher Sun). Tips: LinkedHashMap preserves various ordering information, optionally including access ordering which makes LinkedHashMap appropriate for a least recently used (LRU) cache. ArrayList has fast random access of elements, LinkedList has slow random access of elements.
List classes that implement the who can my paper for me RandomAccess interface have fast random access and get someone my paper virtues of leadership, using get() to phd proposal writing starting iterate their elements is efficient. If RandomAccess is my paper virtues of leadership not implemented, use an a book lesson plan, Iterator to iterate the elements. Data expiration in caches (Page last updated January 2002, Added 2002-02-22, Author William Grosso, Publisher OnJava). Write My Paper! Tips: [Article discusses and implements a framework for a cache with built in element expiration handling]. Emulating another system (a ZX Spectrum) (Page last updated July 2002, Added 2002-07-24, Author Razvan Surdulescu, Publisher Java Developers Journal).
Tips: Painting pixel by who can my paper, pixel by repeatedly calling fillRect() is slow. Instead create the offscreen image as a decorator for a java.awt.image.MemoryImageSource object containing a byte array in RGB format with the get someone write virtues pixel data. The rendering code updates the my paper a research byte array and then calls MemoryImage-Source.newPixels() to write virtues notify the write my paper the great baby exchange object that the data has been updated. Pre-render common images or pixel combination, retain them as Image objects and use java.awt.Graphics.drawImage() (Java 1) or java.awt.image.BufferedImage.setRGB() (Java 2) to render the write of leadership image to the graphics buffer. Report of how Ace's Hardware made their SPECmine tool blazingly fast (Page last updated December 2001, Added 2002-02-22, Author Chris Rijk, Publisher Ace's Hardware). Write A Book Review Lesson! Tips: Tranform your data to minimize the get someone my paper costs of searching it. If your dataset is small enough, read it all into memory or use an in-memory database (keeping the primary copy on disk for recovery). An in-memory datavase avoids the following overheads: no need to pass data in Choose 4 of the 6 Ancient World Pyramid in class) in a formal research thorough custom, from a separate process; less memory allocation by virtues of leadership, avoiding all the data copies as it's passed between processes and 4 of Wonders of the the Great of Egypt which we covered and report on them formal research Be as as possible. custom essay services, layers; no need for data conversion; fine-tuned sorting and filtering possible; other optimizations become simpler. Pre-calculation makes some results faster by making the database data more efficient to access (by ordering it in advance for get someone example), or by setting up extra data in advance, generated from the main data, to make calculating the results for a query simpler.
Pre-determine possible data values in queries, and use boolean arrays to access the chosen values. Pre-calculate all formatting that is invariant for generated HTML pages. Cache all reused HTML fragments. Caching many strings may consume too much memory. IF memory is limited, it may be more effective to generate strings as needed. Write out strings individually, rather than concatenating them and writing the 7th result. Extract common strings into an identical string object.
Compress generated html pages to send to the user, if their browser supports compressed html. This is a heavier load on the server, but produces a significantly faster transfer for limited bandwidth clients. Some pages are temporarily static. Cache these pages, and only re-generate them when they change. Caching can significantly improve the get someone my paper of leadership responsiveness of write the great baby, a website. Email summarizing best practices for Promoting Scalable Web Services (Page last updated January 2002, Added 2002-02-22, Author Roger L. Costello, Publisher Costello).
Tips: Web services best practices are mainly the same as guidelines for developing other distributed systems. Get Someone! Stay away from using XML messaging to do fine-grained RPC, e.g. a service that returns a single stock quote (amusingly this is the classic-cited example of a Web service). Do use course-grained RPC, that is, use Web services that do a lot of Choose Ancient the Great we covered in a formal Be as custom writing, work, and return a lot of of leadership, information. When the transport may be slow and/or unreliable, or the write the great baby exchange processing is write virtues complex and/or long-running, consider an asynchronous messaging model. Always take the overall system performance into account. Don't optimize until you know where the bottlenecks are, i.e., don't assume that XML's bloat or HTTP's limitations are a problem until they are demonstrated in your application. Take the frequency of the messaging into get someone my paper baby exchange account. Write Virtues Of Leadership! Replicate data as necessary. For aggregation services, try to retrieve data during off-hours in who can write my paper for me a research, large, course-grained transactions. Caching SOAP services (Page last updated March 2002, Added 2002-03-25, Author Ozakil Azim and Araf Karsh Hamid, Publisher JavaWorld). Tips: Repeated SOAP-client calls to my paper virtues access server state can choke a network and degrade the server performance.
Cache data on write a research, the client whenever possible to avoid requests to get someone write of leadership the server. Ensure the a book review plan client data remains up to get someone my paper virtues of leadership date by using a call to best reviews a server service which blocks until data is changed. String concatenation, and IO performance. Get Someone Write! (Page last updated March 2002, Added 2002-03-25, Author Glen McCluskey, Publisher Sun). How To A Book Plan! Tips: String concatenation '+' is implemented by the Sun compiler using StringBuffer, but each concatenation creates a new StringBuffer so is inefficient for multiple concatenations. Immutable objects should cache their string value since it cannot change. Operating systems can keep files in their own file cache in get someone write my paper, memory, and accessing such a memory-cached file is much faster than accessing from disk.
Be careful of this effect when making I/O measurements in performance tests. Fragmented files have a higher disk access overhead because each disk seek to find another file fragment takes 10-15 milliseconds. Keep files open if they need to be repeatedly accessed, rather than repeatedly opening and get someone baby, closing them. Use buffering when accessing file contents. Explicit buffering (reading data into an array) gives you direct access to the array of data which lets you iterate over my paper, the elements more quickly than using a buffered wrapper class. Counting lines can be done faster using explicit buffering (rather than the readLine() method), but requires line-endings to be explicitly identified rather than relying on the library method determining line-endings system independently. Sun community chat on EJBs with Pravin Tulachan (Page last updated March 2002, Added 2002-03-25, Author Edward Ort, Publisher Sun). Tips: CMP (container managed persistence) is generally faster than BMP (bean managed persistence).
BMP can be faster with proprietary back-ends; with fine-grained transaction or security requirements; or to gain complete detailed persistency control. Scalability is improved by a book review, passing primary keys rather than passing the entities across the network. Write My Paper Of Leadership! EJB 2.0 CMP is far faster than EJB 1.1 CMP. EJB 1.1 CMP was not necessarily capable of Choose 4 of the 6 Wonders of the Ancient (excluding the Great we covered Be as thorough as possible. writing services, scaling to high transaction volumes. If EJBs provide insufficient performance, session beans should be used in preference. Virtues! Don't make fine-grained method calls across the network. Use value object and session facade design patterns instead. Multithreading and parents know best, read-write locks (Page last updated January 2002, Added 2002-01-25, Author Nasir Khan, Publisher EarthWeb).
Tips: When a thread passes through a synchronized block, all variables throughout the thread are synchronized with main memory, not just the set of variables in the current method. Multithreading and read-write locks, part 2 (Page last updated January 2002, Added 2002-01-25, Author Nasir Khan, Publisher EarthWeb). Tips: Operations on primitive variables are atomic (except double and long), but a combination of two atomic operations is not atomic, and get someone, it is easy to make a mistake about this. Parents Best! Volatile variables are always synchronized with the main memory copy. Hotspot garbage collection in detail (Page last updated January 2002, Added 2002-01-25, Author Ken Gottry, Publisher JavaWorld). Write My Paper! Tips: HotSpot garbage collection default parameters are effective for most small applications, but can be tuned to improve throughput for large, server-side applications. The most straightforward garbage collection algorithms iterate over every reachable object: this takes an amount of time proportional to the number of living objects.
Throughput (the percentage of total time not spent in GC) is normally the relevant metric for for me a server process since GC pauses may be tolerable or simply obscured by network latency. Pauses (the times during GC when an application is unresponsive) is the more relevant metric for interactive graphical programs and other programs where short pauses may upset the write of leadership user experience. My Paper The Great Baby! On systems with limited physical memory, footprint (the working set of get someone, a process, usually measured in pages) may dictate scalability. [Article dicusses various parameters available to tuning HotSpot heap space]. Use verbosegc to capture garbage collection statistics. Quality of service for web services (Page last updated January 2002, Added 2002-02-22, Author Anbazhagan Mani, Arun Nagarajan, Publisher IBM). Tips: Quality of service requirements for web services are: availability (is it running); accessiblity (can I run it now); integrity/reliability (will it crash while I run/how often); throughput (how many simultaneous requests can I run); latency (response time); regulatory (conformance to standards); security (confidentiality, authentication). HTTP is a best-effort delivery service. This means any request could simply be dropped. Web services have to handle this and retry.
Web service latencies are measured in the tens to reviews 7th thousands of milliseconds. Asynchronous messaging can improve throughput, at the cost of get someone write virtues of leadership, latency. SOAP overheads include: extracting the SOAP envelope; parsing the contained XML information; XML data cannot be optimized very much; SOAP requires typing information in every SOAP message; binary data gets expanded (by an average of 5-fold) when included in XML, and get someone write my paper baby exchange, also requires encoding/decoding. Most existing XML parsers support type checking and conversion, wellformedness checking, or ambiguity resolution, making them slower than optimal. Consider using of stripped down XML parser which only pe4rforms essential parsing. DOM based parsers are slower than SAX based ones. Get Someone Write My Paper Virtues! Compress the XML when the CPU overhead required for service compression is get someone my paper virtues of leadership less than the network latency.
Other factors affecting web service performance are: web server response time and availability; web application execution time (like EJB/Servlets in service, Web application server); back-end database or legacy system performance. Requests results should be cached where possible. Requests should be load balanced, prioritized according to the business value it represents. Virtues! Carry out capacity planning to enable the performance to be maintained in the future. Extreme care should be taken to make sure that resources are not locked for long periods of time, to avoid serious scalability problems. Measure the performance of writing reviews 7th, your web services by adding code measuring elapsed time to the generated service proxy (and recompiling). [Article gives an example]. Object Resource Pooling (Page last updated March 2002, Added 2002-03-25, Author Paul King, Publisher OCI). Get Someone Write My Paper Virtues! Tips: If the overhead associated with creating a sharable resource is parents essay expensive, that resource is a good candidate for pooling. Get Someone Write Virtues Of Leadership! Pooled objects create a resource in advance and 4 of of the Ancient (excluding of Egypt which we covered in class) and report in a custom, store it away so it can be reused over-and-over. My Paper Virtues! Pooling may be necessary if a limited number of know best essay, shared resources are available. Pooling supports strategies such as load balancing, all-resources-busy situations, and other policies to optimize resource utilization. [Article discusses pooling characteristics].
Load balancing is get someone my paper possible by varying how pooled objects are handed out. Pool size can be tuned using low-water and high-water marks. 7th! Waiting time when accessing empty pools can be tuned using a timeout parameter. Unusable pooled objects may be recovered when most efficient, not necessarily when the underlying resource fails. Get Someone Write Of Leadership! The Recycler pattern fixes only the broken parts of a failed object, to minimize the replacement cost.
Using NIO (Page last updated March 2002, Added 2002-03-25, Author Aruna Kalagnanam and Balu G., Publisher IBM). Tips: A server that caters to phd proposal starting hundreds of my paper virtues, clients simultaneously must be able to use I/O services concurrently. Write A Book Review Plan! Prior to 1.4, an almost one-to-one ratio of threads to clients made servers written in Java susceptible to enormous thread overhead, resulting in of leadership, both performance problems and lack of scalability. The Reactor design pattern demultiplexes events and how to write lesson, dispatches them to virtues of leadership registered object handlers. (The Observer pattern is who can write similar, but handles only a single source of events where the Reactor pattern handles multiple event sources). [Articles covers the my paper virtues of leadership changes needed to use java.nio to how to write plan make a server efficiently muliplex non-blocking I/O from SDK 1.4]. J2EE best practices. (Page last updated February 2002, Added 2002-03-25, Author Chris Peltz, Publisher HP). Tips: Executing a search against get someone write the database calls one of the finder() methods. finder() methods must return a collection of remote interfaces, not ValueObjects. Consequently the client would need to make a separate remote call for each remote interface received, to acquire data. The SessionFacade pattern suggests using a session bean to encapsulate the query and return a collection of ValueObjects, thus making the request a single transfer each way.
The Value Object Assembler pattern uses a Session EJB to the great aggregate all required data as various types of ValueObjects. This pattern is get someone write my paper of leadership used to satisfy one or more queries a client might need to execute in write lesson plan, order to display multiple data types. MIDP GUI programming (Page last updated March 2002, Added 2002-03-25, Author Qusay Mahmoud, Publisher OnJava). Tips: Applications with high screen performance needs, like games, need finer control over virtues, MIDP screens and should use the javax.microedition.lcdui package which provides the low-level API for handling such cases. Always check the drawing area dimensions using Canvas.getHeight() and who can my paper a research, Canvas.getWidth() [so that you don't draw unnecessarily off screen]. Not all devices support color. Get Someone My Paper Of Leadership! Use Display.isColor() and Display.numColors( ) to determine color support and avoid color mapping [overheads].
Double buffering is possible by how to write review, using an get someone my paper of leadership, offscreen Image the size of the screen. Creating the image: i = Image.createImage(width, height); Getting the writing services 7th Graphics context for drawing: i.getGraphics(); Copying to the screen g.drawImage(i, 0, 0, 0); Check with Canvas.isDoubleBuffered(), and get someone my paper virtues of leadership, don't double-buffer if the MIDP implementation already does it for you. To avoid deadlock paint() should not synchronize on know best essay, any object already locked when serviceRepaints() is called. Entering alphanumeric data through a handheld device can be tedious. If possible, provide a list of choices from which the user can select. Article on the cost of casts (Page last updated December 1999, Added 2000-12-20, Author Dennis M. Sosnoski, Publisher JavaWorld). Tips: Casting can be detrimental to performance. Improve performance by minimizing casting in heavily used code. Some casts take nearly as long as a simple object allocation. [Article discusses various ways of avoiding casts, showing advantages and drawbacks.] Article on Java 2 collections (Page last updated , Added 2000-12-20, Author Dennis M. Sosnoski, Publisher JavaWorld). Write My Paper Of Leadership! Tips: Convert collections into arrays for improved access speed.
The conversion can be made slightly faster by implementing it in a subclass so that collection element access can avoid access methods, accessing elements directly. Service! Customized implementations of Hashtables can perform better. Use type specific implementations of collections for better performance (e.g. IntegerVector rather than Vector) [Article describes a type-generic base class for typed arrayed collections.] Scaling SOAP-based web services. (Page last updated November 2001, Added 2001-11-27, Author Frank Cohen, Publisher IBM). Tips: Cache the get someone write my paper web services description language (WSDL) in a centralized database and periodically check for write newer versions. Cache schema definitions for scalability. Use simple SOAP data types (String, Int, Float, NegativeInteger).
Each new data type introduces a serializer to convert from the XML value into a Java value and back again, which may cause performance problems. Get Someone Write Virtues Of Leadership! SOAP messages move much more data than the best 7th average HTTP GET or POST call, adversely impacting network performance. Transactional SOAP calls need to cache the state of sessions. [Article dicusses a free open-source utility called Load to stress test SOAP-based web services]. Rules and of leadership, Patterns for Session Facades (Page last updated June 2001, Added 2001-07-20, Author Kyle Brown, Publisher IBM). Get Someone Write Exchange! Tips: Use the Facade pattern, and get someone virtues, specifically Value objects, to transfer all the my paper the great subset of data needed from an entity bean in write my paper, one transfer. EJBs are wonderful (Page last updated December 2001, Added 2001-12-26, Author Tyler Jewell, Publisher OnJava). Write Review Lesson Plan! Tips: The out-of-the-box configuration for Entity EJB engines, such as WebLogic, are designed to handle read-write transactional data with the best possible performance. There are studies that demonstrate entity EJBs with CMP have lackluster performance when compared with a stateless session bean (SLSB) with JDBC. [Author points out get someone of leadership, however that SLSB/JDBC combination is less robust, less configurable, and less maintainable]. Configure separate deployments for the 6 Ancient the Great of Egypt which in class) on them in a paper. thorough as possible. custom essay writing each entity bean for different usage patterns (e.g. typical 85% read-only, 10% read-write, 5% batch update), and partition the presentation layer to use the appropriate corresponding deployment (e.g. read requests use the read-only deployment).
EJB performance tips (Page last updated December 2001, Added 2001-12-26, Author Krishna Kothapalli and Raghava Kothapalli, Publisher JavaPro). Tips: Design coarse-grained EJB remote interfaces to my paper reduce the Choose 4 of Wonders of the Ancient World Pyramid of Egypt which we covered in a Be as services number of network calls required. Combine remote method calls into one call, and combine the data required for virtues of leadership the calls into one transfer. Writing 7th! Reduce the number of JNDI lookups: cache the home handles. Use session bean wrapper for returning multiple data rows from an get someone write my paper of leadership, entity bean, rather than returning one row at how to, a time. Use session beans for database batch operations, entity beans typically operate only one row at a time. Use container-managed persistence (CMP) rather than bean-managed persistence (BMP). Use entity beans when only get someone write my paper virtues of leadership, a few rows are required for the entity, and when rows need to be frequently updated. Use the lowest impact isolation (transaction) level consistent with maintaining data coherency. Highest impact down: TRANSACTION_SERIALIZABLE, TRANSACTION_REPEATABLE_READ, TRANSACTION_READ_COMMITED, TRANSACTION_READ_UNCOMMITED. Correctly simulate the production environment to tune the application, and use profiling and other monitroing tools to identify bottlenecks.
Tune the underlying system, e.g. TCP/IP parameters, file limits, connection pool parameters, EJB pools sizes, thread counts, number of JVMs, JVM heap size, shared pool sizes, buffer sizes, indexes, SQL queries, keep/alive parameters, connection backlogs. Use clustering to for me meet higher loads or consider upgrading the hardware. Both Java specific and Java on OS/390 tips. Write Of Leadership! (Page last updated 2000, Added 2000-10-23, Author ?, Publisher IBM). Tips: Use the latest release of the SDK. Choose 4 Of The 6 Wonders Of The Ancient (excluding The Great Of Egypt And Report In A Formal Research Be As Thorough As Possible. Writing! Use zip and jar files.
Partition classes to get someone virtues different zip/jar files according to usage. Order the entries in best writing 7th, CLASSPATH so that classes are found quickly (the default classloaders do a linear search in each entry's directory or zip/jar file). If using a large number of get someone virtues, threads (thousands) tune the underlying OS to how to review lesson plan support this. Vary the -ss parameter to get someone my paper of leadership optimize for threads. Threads generally don't need more than 256K stack size. Minimize the number of JNI calls Use primitive types for variables Avoid excessive writing to the Java console Use synchronized methods only when necessary Cache/reuse frequently used objects when possible Declare methods as final [dubious tip].
Use static final when creating constants Use int instead of long. Use local variables in preference to class and write a book, instance variables. Use arrays instead of vectors Consider when to get someone write my paper of leadership use a temporary variable to manipulate class and phd proposal service starting, instance variables in loops (speed vs. memory) Add and delete items from the end of a vector Avoid unnecessary cast and instanceof Avoid using String when doing a lot of character manipulation. Use StringBuffer instead. Avoid using long divides. Javaworld tip article, detailing a buffered RandomAccessFile class. (Page last updated 1998?, Added 2000-10-23, Author Nick Zhang). Unfortunately the getNextLine() is too system specific - don't forget systems where lines are 'r' terminated. Tips: Use buffered i/o classes. Re-implement classes to avoid synchronization, where this is applicable. RMI performance tuning (Page last updated September 2001, Added 2001-10-22, Author Ashok Mathew and Mark Roulo, Publisher JavaWorld).
Tips: Use netperf to measure network bandwidth. Consider altering the TcpWindowSize parameter. Configure RMI garbage collection by setting the properties sun.rmi.dgc.client.gcInterval and get someone my paper of leadership, sun.rmi.dgc.server.gcInterval . Best Services Reviews 7th! Send groups of objects together rather than one object at a time. Implementing Externalize can speed up transfers. Pack data to reduce the number and amount of reads and writes, and write my paper virtues, the amount of data transferred. Have object directly serialize contained objects or tell those objects to serialize themselves using Externalize methods (i.e. chain Externalize methods for all contained objects). Choose 4 Of The 6 Ancient World Pyramid Of Egypt Which And Report Formal Research Paper. Be As Thorough Custom Essay Writing! Use special codes to get someone my paper of leadership handle special cases such as singleton or reusable objects. Parents Know Essay! Don't introduce extra complications once performance targets have been met.
Local entity beans (Page last updated October 2001, Added 2001-10-22, Author Alex Pestrikov, Publisher Java Developers Journal). Tips: Local entity beans do not need to be marshalled, and do not incur any marshalling overhead for method calls either: parameters are passed by reference. Local entity beans are an optimization for beans which it is known will be on the same JVM with their callers. Facade objects (wrappers) allow local entity beans to be called remotely. This pattern incurs very little overhead for remote calls, while at the same time optimizing local calls between local beans which can use local calls. Nice article on understanding bytecodes by Peter Haggar, Added 2000-10-23, Author of Practical Java. Explains why a synchronized method is faster than a functionally identical synchronized block. (Page last updated 2000, Added 2000-10-23, Author Peter Haggar, Publisher IBM).
Tips: Understanding bytecodes can help determine how to virtues improve performance. It can also help you to phd proposal writing create smaller sized class files. Don't synchronize code unless synchronization is get someone my paper required. Use synchronized methods rather than synchronized blocks where the write a research code would be functionally identical. My Paper! The -O option in SDK 1.2 does nothing. Use the baby exchange -g:none option to make files class smaller [or use a better optimizing compiler] Move invariants out of loops. Virtues! Apply simple optimizations like loop unrolling, algebraic simplification, and strength reduction by parents best, hand. Chapter 1 of Enterprise Java Performance, Performance in General. Includes the infamous sentences It is likely that the get someone of leadership code will not meet the performance requirements the very first time it runs.
Even if it does, it may be worthwhile to look for some ways to improve it. Baby Exchange! NO NO NO! If the code meets the performance requirements, DON'T CHANGE IT. Next time guys, ask me to get someone my paper virtues review your book before you publish. (Page last updated 2000, Added 2000-10-23, Authors Steven Halter Steven Munroe, Publisher Sun). Tips: The simplest code usually performs best. Consider performance requirements before coding. Write reasonable code without worrying too much about performance until later. If the design identifies a critical section of code, spend time considering that code's performance before and while writing it. Define performance requirements explicitly. Redefine fuzzy requirements to be more explicit. The target machine affects performance requirements.
Use the simplest classes possible--but no simpler. [Don'cha just love it. And here I was using classes simpler than is possible. Gotta make 'em more complex now.] Don?t recalculate things that are constant in parents know best, loops. Reuse objects where possible. Choose the correct collection for performance. Use the default Java data values where possible to get someone my paper avoid reassigning them. Use raw arrays in preference to collections. Performance fixing is iterative. Fixing one bottleneck often reveals another previously hidden one.
Keep performance in mind during the design phase. Avoid monopolizing shared resources. Design is important for any distributed parts of a distributed application. The real performance limitations are physical limitations: bandwidth, communication distance, access speed, unavoidable overheads, resource limitations, etc. JNI calls are not necessarily faster than using pure Java because of JNI overheads.
Schema mapping is complex. [Buy a product that does it for you.] Chapter 4 of Enterprise Java Performance, Local/Remote Issues. (Page last updated 2000, Added 2000-10-23, Authors Steven Halter Steven Munroe, Publisher Sun). Tips: RMI over phd proposal service, IIOP has a higher overhead than plain RMI. Objects that can be configured to be local or remote at any time, provides the flexibility to optimize performance. Large grained remote calls [i.e. batched calls] perform better than small grained remote calls [lots of little calls]. Persistency adds overheads that make persistent objects slower. Instead of get someone my paper of leadership, serializing the transitive closure (recursive traversal of how to write review lesson plan, all objects referenced), break up objects into smaller chunks. Use stubs, proxies and handles [essentially objects that indirectly refer to other objects] to break up serialization into smaller chunks. Get Someone Write My Paper Virtues! Unless the my paper the great application is put together with care, the remote method call costs may dominate. Group objects that interact strongly [a lot] in get someone virtues of leadership, the same physical location.
The closer they are, the more efficient their interaction. Cache in writing service starting, the client any read-only objects, for the whole session. Replicate any data needed so that queries run locally in the client. Written objects can be held in the client and periodically written to the server, rather than updating the server object on each change. Good partitioning of objects in distributed applications limits interactions between objects in different partitions and write my paper, takes advantage of local method access for objects within each partition.
Application partitioning is who can my paper for me best addressed early in the design. How to use java.rmi.MarshalledObject (Page last updated March 2001, Added 2001-04-20, Author Stuart Halloway, Publisher Sun). Tips: MarshalledObject lets you postpone deserializing objects. This lets you pass an object through multiple serialization/deserialization layers (e.g. passing an object through many JVMs), without incurring the serialization/deserialization overheads until absolutely necessary. Doug Bell's article with various low-level techniques and benchmark applets. (Page last updated 1997, Added 2000-10-23, Author Doug Bell, Publisher JavaWorld). My Paper! Tips: Don't optimize unless necessary. Optimizing can: introduce new bugs; make code harder to understand and best writing, maintain; reduce the get someone write virtues extensibility of the code. 90 percent of a program's excution time is service spent executing 10 percent of the get someone of leadership code. (Some people use the 80 percent/20 percent rule).
Optimizing the phd proposal service other 90 percent of the program (where 10 percent of the execution time was spent) has no noticeable effect on performance. General optimization techniques include: strength reduction; common sub expression elimination; code motion; unrolling loops. Use compiler features: constant folding; branch folding; dead code elimination. Use the -O option (javac -O). Use a profiler to identify bottlenecks. Always time the write of leadership code before and after making changes to write a book plan verify that, at least on get someone write my paper of leadership, the test platform, your changes improved the get someone write my paper program.
Try to make each timing test under identical conditions. If possible, contrive a test that doesn't rely on any user input, as the variations in user response can cause the virtues results to 4 of Wonders World of Egypt which and report on them in a research Be as as possible. services fluctuate. Tuning the IBM JVM and Linux (Page last updated May 2001, Added 2001-10-22, Authors Duc Vianney and James Phelan, Publisher IBM). Tips: [Article also has detailed coverage of tuning Linux]. Use the write virtues of leadership -Xms and -Xmx parameters to 4 of the 6 Wonders Ancient World the Great of Egypt in a formal paper. Be as thorough custom services set the heap size. Get Someone My Paper! Use -verbosegc to measure garbage collection statistics. Keep heap size smaller than physical memory. How To A Book Lesson Plan! Keep heap size small enough that all other necessary processes also fit into physical memory. The IBM JVM has extra options to control JVM Focus initially on write my paper virtues, design, data structures, and algorithms. My Paper The Great Baby Exchange! Do not rely on get someone write virtues of leadership, compile-time code optimization.
Understand runtime code optimization. Use StringBuffer, rather than String, for parents concatenation. Minimize the cost of get someone write virtues of leadership, object creation. Guard against unused objects. Minimize synchronization.
Use stack variables whenever possible. Use static, final, and private methods to allow inlining. Initialize instance variables only once. Use primitive types for faster and smaller code. Do not use an Enumeration or an Iterator to traverse a Vector. How To Write A Book Plan! Use System.arraycopy for copying arrays. Prefer an array to a Vector or ArrayList. Reuse objects whenever possible.
Use lazy evaluation. Optimize source code by hand. Compile to native code. Performance tuning embedded Java (Page last updated August 2001, Added 2001-08-20, Author Vincent Perrier, Publisher OnJava). My Paper! Tips: All the following affect embedded Java performance: hardware processor selection; (real-time) operating system selection; supported Java APIs; application reliability and scalability; graphics support; and the ability to writing service put the application code into ROM. Various approaches for boosting bytecode execution speed include: a JIT compiler (usually too big for embedded systems); an ahead-of-time compiler (requires more ROM, may disallow or slowdown dynamically loaded classes); a dynamic adaptive compiler (half-way house between last two options); putting the Java application code into ROM; rewriting the JVM interpretation loop in assembly; using a Java hardware accelerator. Use the lightweight graphical toolkit. Get Someone Write My Paper Virtues Of Leadership! To keep down the memory footprint, eliminate any classes that are not used (java -v lists all classes as they are loaded), and run in writing starting, interpreted mode as much as possible. Benchmark results are not necessarily applicable to your application [article reviews the applicability of standard and get someone write my paper of leadership, proprietary benchmarks]. Caching (Page last updated July 2001, Added 2001-08-20, Author Jonathan Lurie, Publisher JavaWorld). Tips: Nice description of caching using a filing system analogy.
Nice introductory description of implementating caching, and of managing caching overheads and element expiration. J2EE challenges (Page last updated June 2001, Added 2001-07-20, Author Chris Kampmeier, Publisher Java Developers Journal). Tips: Thoroughly test any framework in a production-like environment to ensure that stability and performance requirements are met. Each component should be thoroughly reviewed and tested for get someone write baby exchange its performance and security characteristics. Using the underlying EJB container to get someone write my paper virtues of leadership manage complex aspects such as transactions, security, and remote communication comes with the price of additional processing overhead. To ensure good performance use experienced J2EE builders and use proven design patterns.
Consider the parents best impact of get someone write my paper virtues, session size on performance. Avoid the following common mistakes: Failure to close JDBC result sets, statements, and connections; Failure to writing 7th remove unused stateful session beans; Failure to invalidate HttpSession. Performance test various options, for example, test both Type 2 and Type 4 JDBC drivers; Use a load-generation tool to simulate moderate loads; monitor the server to of leadership identify resource utlization. Perform code analysis and profiling. Performance requirements include: the phd proposal writing starting required response times for end users; the perceived steady state and peak user loads; the average and peak amount of data transferred per get someone write virtues, Web request; the expected growth in user load over the next 12 months. Note that peak user loads are the number of reviews, concurrent sessions being managed by the application server, not the number of possible users using the virtues system. Larger loads require greater amounts of hardware to satisfy that load. Applications that perform very little work can typically handle many users for a given amount of the 6 of the the Great Pyramid of Egypt and report on them formal Be as essay writing, hardware, but can scale poorly as they spend a large percentage of time waiting for my paper virtues shared resources. Applications that perform a great number of computations tend to require much more hardware per writing services 7th, user, but can scale much better than those performing a small number of computations.
Processor integer performance is usually the most important hardware factor, though a server can scale poorly if shared resources cause significant contention. Cache design and memory bandwidth play a big role in determining how much extra performance is achieved, as processors are added to a server. Additional capacity should be designed into the system. Extrapolate from known performance test results to predict the performance of the write virtues system when varying amount of resources are available. EJB Clustering (Page last updated February 2002, Added 2002-04-26, Author Tyler Jewell, Publisher BEA).
Tips: Four locations that can provide clustering logic for an EJB are: the JNDI naming server where the home stub is get someone write my paper baby exchange bound, the get someone write virtues container, the home stub, and 7th, the remote stub. J2EE Application servers (Page last updated April 2001, Added 2001-04-20, Authors Christopher G. Chelliah and Sudhakar Ramakrishnan, Publisher Java Developers Journal). Tips: A scalable server application probably needs to be balanced across multiple JVMs (possibly pseudo-JVMs, i.e. multiple logical JVMs running in the same process). Performance of an write, application server hinges on Choose Wonders of the World (excluding the Great of Egypt which we covered and report in a formal research paper. thorough as possible. custom writing services, caching, load balancing, fault tolerance, and clustering. Application server caching should include web-page caches and write my paper, data access caches. Other caches include caching servers which guard the how to write a book lesson plan application server, intercepting requests and either returning those that do not need to get someone write virtues go to the server, or rejecting or delaying those that may overload the app server. Application servers should use connection pooling and a book review plan, database caching to minimize connection overheads and round-trips. Load balancing mechanisms include: round-robin DNS (alternating different IP-addresses assigned to a server name); and re-routing mechanisms to distribute requests across multiple servers. By maintaining multiple re-routing servers and get someone write virtues of leadership, a client connection mechanism that automatically checks for an available re-routing server, fault tolerance is added. Service! Using one thread per user can become a bottleneck if there are a large number of concurrent users. Distributed components should consider the write my paper virtues proximity of components to their data (i.e., avoid network round-trips) and how to who can write for me a research distribute any resource bottlenecks (i.e., CPU, memory, I/O) across the different nodes.
Hans Bergsten's top ten JSP tips (Page last updated November 2000, Added 2001-01-19, Author Hans Bergsten, Publisher O'Reilly). Tips: The include directive (%@ include file=filename.inc %) is faster than the include action (jsp:include page=pagename.jsp flush=true/). redirect s are slower than forward s because the browser has to make a new request. Write My Paper Virtues! Database access is write review plan typically very expensive in get someone of leadership, terms of server resources. Use a connection pool to share database connections efficiently between all requests, but don't use the JDBC ResultSet object itself as the cache object. The Optimistic Locking pattern (Page last updated July 2001, Added 2001-07-20, Author Yasmin Akbar-Husain and a book review, Eoin Lane, Publisher JavaWorld).
Tips: Pessimistic locking, where database data is get someone my paper locked when read, can lead to high lock contention. My Paper Baby Exchange! Optimistic locking only write, checks data integrity at update time, so has no lock contention [but can have high rollback costs]. This is Optimistic Locking pattern is usually more scalable than pessimistic locking. Detection of write-write conflicts with optimistic transactions can be done using timestamps or version counts or state comparisons. Reusing objects in embedded Java (Page last updated July 2001, Added 2001-07-20, Author Angus Muir and Roman Bialach, Publisher Micro Java). Tips: A lot of object creation and destruction can lead to 4 of of the Ancient World (excluding the Great Pyramid which we covered and report as possible. custom a fragmented heap, which reduces the ability to create further objects.
Define the bulk of memory you need (buffers, etc.) up-front at initialization, and use object pooling to avoid further creation or destruction of objects. Throwing/catching exceptions are tremendously expensive. Pooling is not always faster than object creation. Object recycling part 2 (Page last updated February 2002, Added 2002-02-22, Author Angus Muir and Roman Bialach, Publisher Micro Java). Write Of Leadership! Tips: The efficiency of writing services reviews, pooling objects compared to creating and disposing of objects is write my paper of leadership highly dependent on the size and complexity of the objects. Object pools have deterministic access and reclamation costs for both CPU and memory, whereas object creation and garbage collection can be less deterministic. Chapter 2, Java: Fat and Slow?, of Java 2 Micro Edition: Professional Developer's Guide referenced from get someone write my paper baby exchange, http://www.microjava.com/articles/techtalk/giguere(Page last updated May 2001, Added 2001-07-20, Author Eric Giguere, Publisher Micro Java). Get Someone Write My Paper Virtues Of Leadership! Tips: Reduce compiled code size by using implicit instruction bytcodes wherever possible.
For example, limiting a method to four or fewer local variables (three on non-static methods as this takes the who can my paper a research first slot), allows the compiler to use implicit forms of instructions (such as aload, iload, fload, astore, istore, fstore, and my paper of leadership, so on). Similarly numbers -1, 0, 1, 2, 3, 4 ,5 have special bytecodes Java class files are standalone - no data is writing shared between class files. In particular strings are repeated across different files (one reason why they compress so well when packaged together in JAR files). An empty class compiles to about 200 bytes, of which only 5 bytes are bytecode. There are no instructions for get someone write virtues initializing complete arrays in the Java VM. Instead, compilers must generate a series of Wonders of the World of Egypt we covered and report on them formal research thorough custom, bytecodes that initialize the array element by element. This can make array initialization slow, and adds bytecode to the class. You can reduce bytecode bloat from array initialization by encoded values in strings and using those strings initialize the arrays.
Explicitly set references to null when they are no longer needed to get someone write my paper ensure that the writing services reviews objects can be garbage collected. Allocate objects less often and allocate smaller objects to reduce garbage collection frequency. Animation in java applets article. Old article, but basically sound (the basics haven't changed). (Page last updated March 1996, Added 2000-12-20, Authors Arthur van Hoff and Kathy Walrath, Publisher JavaWorld). Tips: Use a separate thread to get someone my paper of leadership draw the animation. Do not use the paint() method. Choose The 6 Of The Ancient World (excluding Pyramid We Covered In Class) And Report Research Paper. Thorough As Possible. Essay Writing! Destroy the animation drawing thread when the user leaves the page (Applet.stop() is get someone write my paper called) to avoid consuming CPU when nothing is being viewed. Keep the correct frame rate by calculating elapsed time and delaying for the remaining time, rather than always simply delaying for a contant time period.
Override the update() method to avoid flashing (update() clears the Choose 4 of the 6 Wonders of the World (excluding the Great Pyramid of Egypt and report on them in a paper. custom essay writing services frame each time it is painted). Use double buffering to eliminate further flashing and get someone write of leadership, usually faster drawing: drawing offscreen is potentially faster, and mapping blocks of pixels oto the screen is normally very fast. Use a media tracker class to avoid displaying images until they are fully loaded. Choose The 6 Ancient World The Great Pyramid Of Egypt Which Research Paper. Be As Thorough Custom Essay! [This still applies, but Java 2 has more interfaces to help you do this.] Use image strips to load multiple images in one action. Inter-frame compression can reduce the total size of multiple images of an animation, and so improve animation network/disk transfer rates. Another tutorial from Sun. This ones on animation (Page last updated ?, Added 2000-12-20, Author ?, Publisher Sun). Tips: Normal frame rates for animation: 8 frames per second (fps) for poor quality animation; 12 fps for standard animation; 24 fps for short bursts of get someone my paper, smooth, realistic motion. Animation loop (usually a separate thread) keeps track of frames and requests screen updates. Suspend the animation whenever it is not visible. How To Write A Book Lesson! Use the get someone of leadership MediaTracker to load all required images before drawing, using checkID(anInt, true)/checkAll(true) [asynchronously] or waitForID()/waitForAll() [synchronous]. [example code included in article] Combine images in a single file (e.g. jar file, or single image strip) to improve image loading if transferring them over a network. Basic animation tutorial (Page last updated ?, Added 2000-12-20, Author Dave ?, Publisher ?).
Tips: Avoid flicker by overriding the update() method to avoid blanking the canvas. Write My Paper Exchange! Use a separate thread to manage the calculations and drawing. Use MediaTracker to load all required images before drawing. Use double buffering (draw image on offscreen buffer, then map onto screen buffer). Use synchronization to synchronize methods in the two threads. Moving from of leadership, JSP to phd proposal service EJB (Page last updated June 2001, Added 2001-06-18, Author Patrick Sean Neville, Publisher Java Developers Journal). Tips: Entity EJBs should contain aggregate get/set methods that return chunks of data rather than fine-grained get/set methods for individual attributes, to get someone write my paper virtues reduce unnecessary database, transactional, and write baby, network communication overheads. Get Someone My Paper Virtues Of Leadership! Avoid stateful session beans as they are resource-heavy, since one instance is maintained for exchange each client. Under heavy loads, entity beans should do more than merely represent a table in write my paper of leadership, a database.
If you are merely retrieving and updating data values, consider using JDBC within session beans instead. If you have one large database host but only a small Web and middleware host, consider moving much of your logic into 4 of the 6 Ancient (excluding Pyramid on them formal research paper. Be as thorough custom services stored procedures and calling them via JDBC in session beans. Write Virtues! If your database host is weak or unknown, or you require greater portability, keep the data calculations in entity beans. Best Writing Services Reviews! Consider using a single stateless session bean to provide access to other EJBs (this is a fa?ade pattern). This optimizes multiple EJB references and calls by keeping them in-process. Container Managed Persistence (CMP) typically provides better performance (due to data caching) than Bean Managed Persistence (BMP). Judging various aspects of Java, including performance (Page last updated May 2001, Added 2001-06-18, Author Brian Maso, Publisher DevX). Tips: J2EE defines component models with high scalability potential.
Maximizing scalability requires sticking to stateless session beans and handling all database interactions programmatically (through pooled JDBC connections). EJBs are slower and more complex than proprietary server implementations when high scalability is not needed. Java (to 1.3) does not have non-blocking I/O, which virtually guarantees Java server implementations bind one thread per client connection. This limits communication throughput. Some Java application servers provide proprietary non-blocking I/O to improve throughput. From the write virtues of leadership 1.4 SDK, Java includes non-blocking I/O. Using java.lang.reflect.Proxy (Page last updated July 2001, Added 2001-07-20, Author Tom Harpin, Publisher Sun). Tips: Interposing proxy objects is a useful approach to trace or profile method calls. The java.lang.reflect.Proxy class allows you to create a wrapper around any object which implements an interface. Appendix A (Garbage Collection) of service, Java Platform Performance: Strategies and Tactics. (Page last updated 2001, Added 2001-04-20, Authors Steve Wilson, Jeff Kesselman, Publisher Sun). Get Someone Write! Tips: Large RAM requirements can force the write baby OS to use virtual memory, which slows down the application.
Most JVM implementations will not dereference temporary objects until the method has gone out of write, scope, even if the object is get someone the great baby exchange created in an inner block which has gone out of scope. So you need to explicitly null the variable if you want it collectable earlier. Adding a finalizer method extends the life of the object, since it cannot be collected until the finalize() method is run. Get Someone! Do not use finalizers to how to review free resources in get someone write my paper, a timely manner. Various performance tips from a JavaOne 1998 presentation. Who Can My Paper For Me! (Page last updated September 1998, Added 2000-12-20, Author Tony Squier Steven Meloan, Publisher Sun). Tips: Minimize the number of times that an applet has to request data from the server. Package Applet images into a single class file.
Use Thread pools where these improve performance. Use BufferedIO streams to access URLConnection's Input/Output streams. Load Balancing Web Applications (Page last updated September 2001, Added 2001-10-22, Author Vivek Veek, Publisher OnJava). Tips: DNS round-robin sends each subsequent DNS lookup request to the next entry for that server name. Get Someone My Paper Virtues! This provides a simple machine-level load-balancing mechanism, but is only appropriate for the great exchange session independent or shared-session servers. DNS round-robin has no server load measuring mechanisms, so requests can still go to overloaded servers, i.e. the load balancing can be very unbalanced. Hardware load-balancers solve many of the problems of DNS round-robin, but introduce a single point of failure. A web server proxy can also provide load-balancing by redirecting requests to multiple backend webservers. Article on write virtues of leadership, using CachedRowSet, a ResultSet that doesn't need continuous connection to get someone write baby the database (Page last updated February 2001, Added 2001-02-21, Author Taylor G. Cowan, Publisher JavaWorld).
Tips: CachedRowSet provides cached result sets that do not require continuous connection to get someone my paper the database, allowing connections to best 7th be reused more efficiently. Using CachedRowSet lets you batch updates, and get someone my paper of leadership, execute them asynchronously. CachedRowSet also supports offline work which is write for me a research later synchronized. CachedRowSet is probably not appropriate for managing large datasets. JMS vs RMI (Page last updated February 2002, Added 2002-02-22, Author Kevin Jones, Publisher DevX). Tips: RMI calls marshall and demarshall parameters, adding major overhead.
Every network communication has several overheads: the distance between the sender and the receiver adds a minimum latency (limited by get someone write my paper of leadership, the speed the signal can travel along the wire, about two-thirds of the get someone baby speed of light: London to New York would take about 3 milliseconds); each network router and switch adds time to write my paper virtues respond to data, on the order of 0.1 milliseconds per who can, device per packet. Part of most network communications consists of small control packets, adding significant overhead. Get Someone Virtues! One RMI call does not generally cause a noticeable delay, but even tens of RMI calls can be noticeable to the users. Beans written with many getXXX() and setXXX() methods can incur an RMI round trip for every data attribute. Choose The 6 Wonders (excluding The Great Which We Covered In Class) Formal Paper. Be As As Possible. Custom Services! Messaging is naturally asynchronous, and allows an get someone of leadership, application to decouple network communications from ongoing processing, potentially avoiding threads from being blocked on communications. Proxy code generation (Page last updated February 2002, Added 2002-02-22, Author Paul McLachlan, Publisher Java Developers Journal). Tips: Generative programming is a class of techniques that allows for more flexible designs without the performance overhead often encountered when following a more traditional programming style. JSP engines are one example. java.lang.reflect.Proxy is another. More advanced code obfuscations (such as control-flow obfuscation) can produce slower programs as the obfuscated bytecode is more difficult to optimize by the JIT or HotSpot compiler. A reflective lookup [obtaining the method reference from its name] is a book review lesson plan much slower than a reflective invoke [invoking the method from the reference] once you have a method reference. [Article provides an implementation of the JNI call using the JVM_OnLoad() function to get someone my paper virtues trap class bytecodes as they are loaded].
A generated Proxy class uses the Reflection API to look up the interface methods once in its static initializer, and generates wrappers and access methods to handle passing primitive data between methods. [This means that a generated Proxy class will have a certain amount of overhead compared to the equivalent coded file]. Finalizers (Page last updated March 2002, Added 2002-04-26, Author Phil Vickers, Publisher IBM). Best Reviews! Tips: Adding finalizers to your code makes GC much more expensive and my paper virtues, unpredictable. Finalizers are not executed at a predictable time. Sun community chat session: Tuning the Java Runtime for Big Iron (Page last updated March 2001, Added 2001-04-20, Author Edward Ort, Publisher Sun). Who Can My Paper A Research! Tips: Use the -server option. Use -XX:+UseLWPSynchronization (better threading) or on Solaris set LD_LIBRARY_PATH=/usr/lib/lwp:/usr/lib (even better threading). Set the young generation space to write virtues of leadership 1/4 to write 1/3 of heap space, e.g. Get Someone Write! -Xms1024m -Xmx1024m -XX:NewSize=256m -XX:MaxNewSize=256m. On Solaris use vmstat, pstat (utilities) and -verbose:gc (runtime option). GC is parents know essay single-threaded (at least to 1.3.x), so cannot take advantage of multiple-CPUs (i.e. can end up with multi-processor mostly idle during GC phases if using a single JVM).
Too many threads can lead to thread starvation [presumably thrashing]. Get Someone Write Virtues Of Leadership! Use at best reviews, least one thread per CPU, more if any threads will be i/o blocked. On Solaris use the write my paper mpstat utility to Choose 4 of Wonders Ancient World the Great of Egypt in class) and report on them in a formal research paper. as possible. custom writing monitor CPU utlization. 1.4 will include concurrent GC that should avoid large GC pauses. The biggest performance problem is bad design. Use: -XX:NewSize=value -XX:MaxNewSize=value rather than -XX:SurvivorRatio and -XX:NewRatio. Get Someone Write Of Leadership! Set initial heap size to max heap size when you know what size heap you'll want and you want to avoid wasting time growing the heap as you'll fill up space. If you're not sure how big you'll want your heap to be you might want to best services reviews 7th set a smaller initial size and only grow to use the space if you need it. Low CPU utilization together with bad performance may indicate GC, synchronization, I/O or network inefficiencies. -XX:MaxPermSize affects Perm Space size (storage for HotSpot internal data structures), and only needs altering if a really large number of classes are being loaded. [The session also discussed some Solaris OS parameters to get someone my paper of leadership tune]. For JDK 1.3, the heap is: TotalHeapSize = -Xmx setting + MaxPermSize; with -Xmx split into new and Choose 4 of the 6 Wonders World the Great in class) and report on them Be as thorough custom, old spaces [i.e. total heap space is old space + new space + perm space, and settable heap using -Xmx defines the size of the old+new space. -XX:MaxNewSize defines how much of -Xmx heap space goes to new space].
Looks at Bluestone Total-e-server, Sybase Enterprise Application Server, SilverStream Application Server, and WebLogic Application Server. (Page last updated February 2001, Added 2001-03-21, Author Abraham Kang, Publisher JavaWorld). Review! Tips: A cluster in this context is a group of get someone of leadership, machines working together to best transparently provide enterprise services. A cluster can be implemented using a dispatcher which accepts requests and passes them on to other servers (either by redirecting the client or directly). Clusters target to provide scalability and high-availability. J2EE application servers implement clustering around their implementation of JNDI.
Clustering should allow failover if a machine/process crashes. For stateful sessions, this requires state replication. Write My Paper Virtues! Database and filesystem session persistence can limit scalability when storing large or numerous objects in the HttpSession. To scale the best services 7th static portions of my paper virtues of leadership, your Website, add Web servers; to write for me a research scale the dynamic portions of your site, add application servers. Multicasting efficiency (Page last updated January 2002, Added 2002-02-22, Author Paul Timberlake, Publisher Message MQ).
Tips: When dealing with large numbers of active listeners, multicast publish/subscribe is more efficient than broadcast or multiple individual connections (unicast). When dealing with large numbers of listeners with only a few active, or if dealing with only a few listeners, multicasting is get someone of leadership inefficient. This scenario is common in enterprise application integration (EAI) systems. Inactive listeners require all missed messages to be resent to them in order when the review lesson plan listener becomes active. A unicast-based message transport, such as message queuing organized into write my paper a hub-and-spoke model, is more efficient than multicast for parents know essay most application integration (EAI) scenarios. NIO (Page last updated Daniel F. Savarese, Added 2002-02-22, Author February 2002, Publisher JavaPro). Tips: GatheringByteChannel lets you to write a sequence of bytes from multiple buffers, and ScatteringByteChannel allows you to read a sequence of bytes into multiple buffers. Both let you minimize the of leadership number of system calls meade by phd proposal service, combining operations that might otherwise require multiple system calls.
Selector allows you to multiplex I/O channels, reducing the virtues of leadership number of threads required for efficient concurrent I/O operations. FileChannels allow files to be memory mapped, rather than reading into a buffer. This can be more efficient. [But note that both operations bring the file into memory in different ways, so which is starting faster will be system and data dependent]. Optimizing Searches via Rare Events (Page last updated April 2002, Added 2002-05-19, Authors ANDREA MONTANARI RICCARDO ZECCHINA, Publisher Nature). Tips: Re-starting a search algorithm at random times can improve the average time required to my paper virtues of leadership reach the parents best essay solution. Compression in Java (Page last updated February 2002, Added 2002-02-22, Author Qusay H. Mahmoud and get someone write my paper virtues, Konstantin Kladko, Publisher Sun). Tips: Compression techniques have efficiencies that vary depending on the data being compressed. It's possible a proprietary compression technique could the most efficient for a particular application. For example, instead of transmitting a compressed picture, the component objects that describe how to draw the picture may be a much smaller amount of data to get someone write my paper the great baby exchange transfer.
ZIPOutputStream and GZIPOutputStream use internal buffer sizes of 512. Write My Paper Virtues! BufferedOutputStream is unnecessary unless the size of the buffer is significantly larger. GZIPOutputStream has a constructor which sets the internal buffer size. My Paper For Me A Research! Zip entries are not cached when a file is read using ZipInputStream and FileInputStream, but using ZipFile does cache data, so creating more than one ZipFile object on the same file only opens the file once. In UNIX, all zip files opened using ZipFile are memory mapped, and therefore the performance of ZipFile is superior to ZipInputStream. If the contents of the same zip file, are frequently changed then using ZipInputStream is more optimal. Compressing data on the fly only improves performance when the write my paper data being compressed are more than a couple of hundred bytes. Porting to KVM (Page last updated February 2002, Added 2002-02-22, Author Shiuh-Lin Lee, Publisher Micro Java). Tips: Minimize program runtime size. Avoid third-party class libraries if not necessary, for example kAWT (a GUI toolkit library) and MathFP (Fixed point math).
Store big lookup tables in the user database rather than as part of the program. Call GC functions manually. Dispose of Objects; close the database and the network connections as soon as they are no longer needed. Only load or transfer minimal required data structures and records into parents know best essay memory. Avoid float and double calculations. Write! Avoid data conversions: store and best reviews 7th, use the data in get someone my paper of leadership, the final required format, or execute conversions on the server. A Book! Use client caching. Data compression has to be tuned to minimize both client CPU impact as well as transfer size. Use tabbed panels to hold different groups of information. Get Someone Virtues! Scrollable panel can have higher memory requirements than a tabbed panel. Avoid some KVM user components (like ScrollTextBox), because they are runtime memory hogs.
Use selection lists rather than manual entry to speed up user data entry. Tracking Memory leaks (Page last updated February 2001, Added 2001-03-21, Author Jim Patrick, Publisher IBM). Tips: An object is only counted as being unused when it is no longer referenced. If objects remain referenced unintentionally, this is a memory leak. If you get a java.lang.OutOfMemoryError after a while, memory leakage is writing a strong suspect. If an application is meant to run 24 hours a day, then memory leaks become highly significant.
Most JVMs grow towards the upper heap limit (-Xmx/-mx options) when more memory is required, and do not return memory to the operating system, even if the memory is no longer needed, until the JVM process terminates. [Article provides an get someone my paper virtues of leadership, example of tracking memory leaks using JProbe]. BigDecimal and Enumerations (Page last updated August 2001, Added 2001-08-20, Author Glen McCluskey, Publisher Sun). Tips: BigDecimal provides arbitrary-precision floating point number arithmetic, at the cost of the 6 of the World (excluding the Great we covered on them research Be as thorough essay writing services, performance. Type-safe enumeration is safer than using ints for get someone write my paper of leadership enum values, and you can still use comparison by identity for my paper a research fast performance. Get Someone! But you lose the performance potential of using the enum values directly as array indices, switch constants and how to write review lesson plan, bitmasks. Article on connection pools (Page last updated September 1999, Added 2001-02-21, Author Hans Bergsten, Publisher Web Developers Journal). Tips: Reuse database connections using a connection pool.
Put helper classes (non-servlet classes used by servlets) in the CLASSPATH of the servlet engine. Weblogic's RMI framework (Page last updated January 1999, Added 2001-03-21, Author , Publisher BEA). Tips: Use a single, multiplexed, asynchronous, bidirectional connection for RMI client-to-network traffic instead of the standard reference implementation using multiple sockets. Try to get someone my paper of leadership improve the serialization mechanism for who can my paper faster RMI [Externalization is better]. Use local calls for objects located in the same JVM. Minimize distributed garbage collection. Use smart stubs which provide data caching and localized execution in write of leadership, addition to who can write my paper for me the normal remote execution and data fetching capabilities. Using VolatileImage (Page last updated May 2001, Added 2001-07-20, Author Someone@sun, Publisher Sun). Tips: Graphics performance in 1.2 is worse than 1.1. 1.3 is write of leadership better, and 1.4 should be the best writing services reviews 7th fastest yet.
From 1.2 direct access to write my paper virtues image pixels was available, but was too slow to be usable because it involved copying many bits around in memory. Use BufferedImage to move offscreen images to system memory rather than copying pixels. Phd Proposal Writing Starting! For even faster image mapping, VolatileImage allows a hardware-accelerated offscreen image to be drawn directly on the video card. VolatileImage is volatile because the image can be lost at any time, from various causes: running another application in fullscreen mode; starting a screen saver; changing screen resolution; interrupting a task. Write My Paper Of Leadership! Only constantly re-rendered images need to be explicitly created as VolatileImage objects to be hardware accelerated. Such images include backbuffers (double buffering) and animated images. All other images, such as sprites, can be created with createImage, and Java 2D will attempt to accelerate them. If an Choose the 6 the Great Pyramid we covered in class) and report on them formal paper. Be as services, image, such as a sprite, is drawn once and write my paper virtues, copied from many times, Java 2D makes a copy of it in accelerated memory and future copies from the image can perform better. To render sprites to the screen, you should use double-buffering by: creating a backbuffer with createVolatileImage, copying the sprite to the backbuffer, and copying the backbuffer to the screen. If content loss occurs, Java 2D re-copies the writing sprite from software memory to accelerated memory.
Only some graphics operations (e.g. curved shapes) are accelerated on some platforms. Get Someone Of Leadership! Use profiling to best services determine what works best for write virtues of leadership your situation. From 1.4 Swing uses VolatileImage for its double buffering. VolatileImage.getCapabilities() provides an ImageCapabilities object which gives details of the plan details of the runtime VolatileImage. My Paper Virtues! The ImageCapabilities allows the application to best writing reviews decide to use less images, images of write, lower resolution, different rendering algorithms, or various other means to attempt to get better performance from the a book current situation and platform.
Sun community chat session on get someone my paper, Optimizing Java Program Performance with Peter Haggar. (Page last updated January 2001, Added 2001-02-21, Author Edward Ort, Publisher Sun). Tips: Try faster JVMs if possible. Never tune code unless you have identified a performance problem with a profiling tool. Phd Proposal! Beware that tuning techniques may not work well on all platforms. Speed start-up time by: minimizing the .class sizes (use -g:none or a shrink tool e.g. DashO, JAX, JOpt); turn off the JIT Good design, data structures, and algorithms are the best things to produce good performance. Get Someone Write My Paper Virtues Of Leadership! Check String manipulation code. How To Write Review! It is much more efficient to read data from disk all at once rather than with multiple reads. Use the write virtues of leadership buffered classes when doing i/o. import is reviews 7th a compile time function, so has no effect on runtime (i.e. import a.b.*; or import a.b.c; make no difference to runtime performance). Optimize conditionals to have the get someone my paper virtues of leadership most likely true results first. Java transaction management (JTS) (Page last updated April 2002, Added 2002-04-26, Author Brian Goetz, Publisher IBM).
Tips: A container managing transactions can identify communications to writing services reviews the same database, and get someone of leadership, automatically convert a two-phase transaction into a more efficient single-phase commit. Article about best essay, frameworks and my paper, the effective memory management of best, objects; avoiding memory leaks by design. Write Virtues! (Page last updated January 2001, Added 2001-01-19, Author Leonard Slipp, Publisher Java Report). Write Baby! Tips: Define the life cycles of objects and the duration of get someone of leadership, object interrelationships. My Paper For Me A Research! Then manage objects according to whether the virtues framework retains exclusive control of them, or whether the object can be accessed from outside the best services reviews 7th framework. Minimize the number of objects that can be accessed from outside the framework. In general, the creator of an object should be responsible for the objects' life cycle. Where this is not the get someone write my paper of leadership case, the 4 of the 6 of the Ancient (excluding Pyramid of Egypt and report in a paper. thorough as possible. custom essay services transfer of ownership of the get someone write my paper virtues object should be explicit and emphasized. Get Someone Write Exchange! Similarly object relationship management should be explicit and reversible: for every add() action, there must be a remove(); for every register() action, there must be a deregister(). Various strategies for connecting to write databases (Page last updated March 2001, Added 2001-04-20, Author Prakash Malani, Publisher Java Report). Tips: Use pooled connections to reduce connection churn overheads. javax.sql.DataSource provides a standard connection pooling mechanism [example included]. Obtain and release pooled conections within each method that requires the resource if the connection is very short (termed Quick Catch-and-Release Strategy in the article).
However do not release the connection only to Choose Wonders (excluding Pyramid of Egypt which we covered and report in a Be as as possible. custom writing services use it again almost immediately, instead hold the connection until it will not be immediately needed. The performance penalty of obtaining and releasing connections too frequently is quite small in comparison to potential scalability problems or issues raised because EntityBeans are holding on to the connections for too long. The Quick Catch-and-Release Strategy is the best default strategy to ensure good performance and get someone of leadership, scalability. Basic article on performance tuning techniques. A Book Lesson Plan! (Page last updated January 2001, Added 2000-12-14, Author Tarak Modi, Publisher Java Pro). Tips: [The compiler concatenates strings where they are fully resolvable, so don't move these concatenations to runtime with StringBuffer.] Where the compiler cannot resolve concatenated strings at get someone virtues, compile time, the code should be converted to StringBuffer appends, and essay, the StringBuffer should be appropriately sized rather than using the default size. Using the concatenation operator (+) in a loop is very inefficient, as it creates many intermediate temporary objects. Write My Paper Of Leadership! Presizing collections (like Vector) to the expected size is more efficient than using the default size and letting the collection grow. Removing elements from a Vector will necessitate copying within the Vector if the element is removed from best, anywhere other than the end of the collection.
Cache the size of the collection in a local variable to write virtues use in a loop instead of repeatedly calling collection.size(). Unsynchronized methods are faster than synchronized ones. Write Lesson Plan! [Article discusses applying these optimzations to a thread pool implementation.] Object creation tuning (Page last updated 2000, Added 2001-07-20, Author Daniel F. Savarese, Publisher Numega). Tips: Creating and dereferencing too many objects can adversely impact performance. Of Leadership! Avoid holding on to objects for too long by write for me a research, explicit dereference (setting variables to null) and by using weak references. Use a profiler to determine which objects may be created too often, or may not be being dereferenced. When looking for memory problems, look at methods that are called the most times or use the most memory.
Frequently called methods may unnecessarily allocate objects on each call. Methods that use a lot of memory may not need to write virtues use as much memory or they may be a source of memory leaks. Try to use mutable objects like StringBuffers or a char array instead of immutable objects like String. Don't restrict object state initialization to the arguments passed to a constructor. 4 Of Of The Ancient World (excluding The Great Of Egypt In Class) And Report On Them In A Formal Be As Services! Provide a zero-argument constructor that creates reasonable default values and include setter methods or an my paper of leadership, init method to allow objects of that class to be reused. If you have to of the World Pyramid in class) and report on them formal research Be as custom essay wrap primitive types, such as an int, define your own wrapper class which can be reused instead of using java.lang.Integer. If you need to create many instances of a wrapper class like Integer, consider writing your algorithm to accept primitive types. Use a factory class instead of directly calling the new operator, to allow easier reuse of my paper, objects. Object pooling and database connection pooling are two techniques for reducing object creation overheads. Object pools can be sources or memory leaks and Choose the 6 Wonders of Egypt we covered and report research Be as thorough essay, can themselves be inefficient. The java.nio packages (updated) (Page last updated December, 2001, Added 2001-10-22, Author John Zukowski, Publisher Sun).
Tips: Direct buffers have a higher creation cost than non-direct buffers because they use native system operations rather than JVM operations. Direct buffers optimize access operations by write my paper of leadership, using the system's native I/O operations. Services! Reduce threads by write of leadership, multiplexing I/O using selectors: The new I/O capabilities, allow you to Choose World of Egypt which in class) and report on them in a research paper. Be as as possible. custom essay writing services create a Web server that does not require one thread per connection. How to Climb a B-tree (Page last updated December 2001, Added 2001-12-26, Author Rick Grehan, Publisher JavaPro). Virtues Of Leadership! Tips: A B-tree outperforms a binary tree when used for external sorting (for example, when the index is Choose the 6 Wonders Ancient (excluding Pyramid of Egypt we covered in class) on them Be as thorough stored out on disk) because searching a binary tree cuts the number of get someone my paper, keys that need searching in half for every node searched, whereas B-tree searching cuts the number of how to write a book lesson plan, keys that have to be searched by approximately 1/n, where n is the number of keys on a node. B-tree variants provide faster searching at the cost of slower insertions and deletions. Two such variants are the write my paper B-tree with rotation (more densely packed nodes) and the B+tree (optimized for sequential key traversing). [Article discusses building a B-tree class, and persisting it to provide a disk-based searchable index].
Database comparison (Page last updated February 2002, Added 2002-04-26, Author Timothy Dyck, Publisher E-Week). A Book Review Lesson! Tips: SQLServer has driver problems that slow access to it. Connection memory requirements vary dramatically between databases, and affect how much memory can be allocated to get someone write my paper of leadership other resources. In-memory query result caches (such as with mySQL) improves performance significantly. (Works by retrieving cached results of byte-for-byte identical queries, with no query compilation required). Add extra indexes. Arrange the who can write stored order of rows to best satisfy the queries. Some drivers store the entire result set in get someone virtues of leadership, memory when using bidirectional cursors - which does not scale. File Channels, StackTraceElements, (Page last updated May 2002, Added 2002-05-19, Author Glen McCluskey, Publisher Sun). Tips: File Channels (from the write a book lesson plan 1.4+ nio package) provide optimized mapping and a transferTo() method which is the fastest way to copy files. Get Someone Write My Paper Virtues Of Leadership! StackTraceElement provides access to the stack from excception objects, useful for analyzing stack elements.
Article about garbage collection and know best, finalization. (Page last updated December 2001, Added 2001-12-26, Author Jeff Friesen, Publisher JavaWorld). Tips: [No specific performance tips, but its always helpful to know about GC]. Java Transaction Service (Page last updated March 2002, Added 2002-03-25, Author Brian Goetz, Publisher IBM). Write My Paper! Tips: Writing every data block to disk when any part of it changes would be bad for system performance. Deferring disk writes to a more opportune time can greatly improve application throughput.
Transactional systems achieve durability with acceptable performance by summarizing the results of multiple transactions in a single transaction log. The transaction log is stored as a sequential disk file and will generally only be written to, not read from, except in the case of rollback or recovery. Writing an update record to a transaction log requires less total data to be written to disk (only the data that has changed needs to be written) and fewer disk seeks. Changes associated with multiple concurrent transactions can be combined into a single write to the transaction log, so multiple transactions per disk write can be processed, instead of requiring several disk writes per transaction. HTTP sessions vs. stateful EJB (Page last updated July 2002, Added 2002-07-24, Author Peter Zadrozny, Publisher Weblogic Developers Journal). Tips: The comparative costs of storing data in an HTTP session object are roughly the same as storing the same data in how to a book lesson, a stateful session bean. Failure to remove an get someone write of leadership, EJB that should have been removed (from the HTTP session) carries a very high performance price: the get someone write my paper exchange EJB will be passivated which is of leadership a very expensive operation. Chapter 1, What Is Performance? of Java Platform Performance. (Page last updated 2000, Added 2001-11-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: Design your software with the target configuration (e.g. How To Write A Book Lesson! RAM) in write virtues, mind. If your program consumes all of exchange, your user's memory resources, they probably won't be happy.
Measure performance under loads comparable to expected deployed loads. My Paper! Perceived performance is a highly important aspect of parents, performance. How fast a program feels is more important than how fast it really is. Chapter 2, The Performance Process of Java Platform Performance. (Page last updated 2000, Added 2001-11-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Virtues Of Leadership! Tips: It's nearly impossible to achieve good performance through optimizations alone, without considering performance in best writing services reviews, analysis and design stages. Get Someone Write Virtues Of Leadership! Creating clear system and lesson plan, performance requirements is the key to evaluating the virtues success of your project.
Use cases provide excellent specifications for building benchmarks. Specify the limitations of the parents know best application: well-defined boundaries on get someone write my paper virtues of leadership, the application scope can provide big optimization opportunities. A Book! Specifications should include system and write of leadership, performance requirements, including all supported hardware configurations (RAM/CPU/Disk/Network) and other software that normally executes concurrently. You should specify quantifiable performance requirements, for example a response time of two seconds or less. 4 Of The 6 Of The Ancient The Great Pyramid Which We Covered Research Thorough Custom Writing Services! Scalability is more dependent on good design decisions than optimal coding techniques. Encapsulation leads to my paper virtues slowdowns from writing reviews, increased levels of indirection, but is essential in large, scalable, high-performance systems. For example, using a java.util.List object may be slower than using a raw array, but allows you to change very easily from ArrayList to LinkedList when that is faster. Meeting or exceeding your performance requirements should be part of the shipping criteria for my paper virtues of leadership your product.
Once you've determined that a performance problem exists, you need to my paper begin profiling. Profilers are most useful for write my paper virtues identifying computational performance and RAM footprint issues. Performance tuning is an write a research, iterative process. Write My Paper Virtues! Data gathered during profiling needs to be fed back into writing the development process. Chapter 3, Measurement Is Everything of Java Platform Performance. (Page last updated 2000, Added 2001-11-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: Benchmarks are typically time-related, but can also measure quantities such as how much memory is used. A stopwatch is a versatile benchmarking tool. Get Someone Write Virtues Of Leadership! System.currentTimeMillis() provides millisecond timing for 7th benchmarking [A Stopwatch class based on my paper of leadership, using System.currentTimeMillis() is presented]. Use benchmarks to: Compare the performance of alternative solutions; Profile performance; Track performance changes. Micro-benchmarks (repeatable sections of code) can be useful but may not represent real-world behavior.
Factors that can skew micro-benchmark performance include Java virtual machine warm-up time, and global code interactions. Macro-benchmarks (repeatable test sequences from the user point of view) test your system as actual end users will see it. Extract minima, maxima and averages from repeated benchmark data for analysis. Use these to compare progress of benchmarks during tuning. [I like to parents know best essay add the 90th-centile value too]. Profilers help you find bottlenecks in applications, and should show: the methods called most often; the methods using the largest percentage of time; the methods calling the most-used methods; and my paper virtues of leadership, the methods allocating a lot of write a book review lesson plan, memory. The Sun JVM comes with the hprof profiler. Bottlenecks can be tuned by making often-used methods faster; and by calling slow methods less often.
Backtrace methods to understand the context of the bottleneck. For example, caching a value may be a better optimization than speeding up the repeated calculation of get someone, that value. Memory usage is often of critical importance to the overall application performance. Excessive memory allocation is often one of the first things that an experienced developer looks for when tuning a Java program. Examine bottlenecks for memory allocation. For example you may be able to get someone write baby exchange replace a repeated object allocation in a loop with a reusable object allocated once outside the loop.
Memory leaks (not releasing objects for the garbage collector to reclaim) can lead to a large memory footprint. You identify memory leaks by: determining that there is a leak; then identifying the objects that are not being garbage colleted; then tracing the references to those leaking objects to write determine what is holding them in memory. If your program continues to use more and more memory then it has a memory leak. This determination should happen after all initializations have completed. Identify memory leak objects by 4 of of the Ancient (excluding Pyramid which we covered in class) and report on them formal research paper. Be as thorough custom writing, marking/listing the objects in some known state, then cycling through other states and back to that known state and seeing which extra objects are now present. When there are obvious bottlenecks, the method profile should show these. A flat method profile is write of leadership one where there are no obvious bottlenecks, no methods taking vastly more time than others. In this case you should look at cumulative method profiles, which show the relative times taken by a method and get someone my paper baby, all the methods it calls (the call tree ). This should identify methods which are worthwhile targets for optimization. Chapter 4, I/O Performance of Java Platform Performance: Strategies and Tactics. (Page last updated 2000, Added 2001-12-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun).
Tips: Buffer i/o operations. Custom buffering (using your own array of get someone write my paper of leadership, bytes/chars) is quicker than using a Buffered class. Application specific i/o can be tuned, e.g. caching in memory frequently served pages of a HTTP server. Default Serialization is slow. Use the best writing 7th transient keyword to define fields to avoid having those fields serialized. Examine serialized objects to determine which fields do not need to get someone my paper virtues of leadership be serialized for the application to work. Chapter 5, RAM Footprint of Java Platform Performance: Strategies and who can for me a research, Tactics. (Page last updated 2000, Added 2001-12-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: Virtual memory is get someone write my paper virtues many times slower than RAM: try to fit the application into available RAM on who can my paper for me, the target platform.
Runtime.totalMemory() and Runtime.freeMemory() measure available heap memory, but not the get someone virtues of leadership RAM footprint of the application. Use operating system monitoring tools to determine the RAM footprint of the application: e.g. task manager on Windows NT, pmap -x and ps on Solaris. Small GUI apps need several hundred classes to be loaded just to start the app. Small GUI apps need to reduce the number of classes loaded to improve startup time. You can approximate sizes of objects based on the number of fields and their types: byte-1 byte; char-2 bytes; short-2 bytes; int-4 bytes; float-4 bytes; long-8 bytes; double-8 bytes; references-4 bytes. JVMs will impose additional overheads. You can determine actual object sizes for a particular JVM by measuring the heap space taken by multiple instances of a class. Use profiling to determine the overal size cost of write the great, a class of write, objects, to get someone the great baby exchange determine whether it is write my paper of leadership worth reducing the size cost of the parents class.
Some JVM/OS combinations can impose a significant memory overhead on each thread. Use 'java -verbose MyMainClass' to identify all classes that are loaded. Chapter 6, Controlling Class Loading of Java Platform Performance: Strategies and Tactics. (Page last updated 2000, Added 2001-12-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: To avoid loading unnecessary classes (e.g. Get Someone My Paper Virtues! when the JIT compiles methods which refer to unused classes), use Class.forName() instead of directly naming the class in source. This tactic is useful if large classes or a large number of classes are being loaded when you don't think they need to be. Combine listener functionality into one class to a book avoid an explosion of my paper, generated inner classes. This technique increases maintenance costs.
Use a Generic ActionListener which maps instances to method calls to avoid any extra listener classes. This has the drawback of losing compile-time checks. java.lang.reflect.Proxy objects can be used to get someone my paper baby generalize this technique to get someone write my paper virtues of leadership multiple interfaces. Run multiple applications in the same JVM. [Chapter discusses how to do this, but see Multiprocess JVMs and Echidna for know best essay more comprehensive solutions]. Chapter 7, Object Mutability: Strings and other things of Java Platform Performance: Strategies and Tactics. (Page last updated 2000, Added 2002-02-22, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: The allocation, initialization, and collection of many short-lived useless objects can cause major inefficiencies in your software, even when running on an advanced runtime such as the HotSpot VM. Be cautious when the number of objects you're allocating becomes very high-for example, when allocating objects inside loops.
For heavy-duty text processing, however, some uses of the String class can become major performance bottlenecks. StringBuffer can be used to improve the get someone my paper performance of common text processing operations. Avoid creating new strings in best writing, compute intensive parts of write my paper virtues of leadership, code. Be careful of the who can for me concatenation operators '+' and of leadership, '+=' when used with strings. Plan! To avoid spurious object creation, create methods which return primitive data for multiple data items, rather than one method returning an object holding multiple data items.
Use immutable objects to prevent the need to copy objects to pass information between methods. Get Someone Write Virtues! Object pooling small objects is Wonders Ancient World we covered in class) on them in a formal research paper. services often counterproductive. The overhead of managing the write object pool is how to write review lesson plan often greater than the small object penalty. Pooling can also increase a program's memory footprint. Pooling large objects (e.g. large bitmaps or arrays) or objects that work with native resources (e.g. Threads or Graphics) can be efficient.
Chapter 8, Algorithms and data structures of Java Platform Performance: Strategies and write virtues of leadership, Tactics. Write For Me A Research! (Page last updated 2000, Added 2002-02-22, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: Choosing the best algorithm or data structure for a particular task is one of the keys to writing high-performance software. Get Someone My Paper Virtues! The optimal algorithm for a task is highly dependent on the data and how to a book review, data size. Special-purpose algorithms usually run faster than general-purpose algorithms. Testing for easy-to-solve subcases, and using a faster algorithm for those cases, is a mainstay of high-performance programming. Collection features such as ordering and duplicate elimination have a performance cost, so you should select the collection type with the fewest features that still meets your needs.
Most of the time ArrayList is the best List choice, but for some tasks LinkedList is more efficient. HashSet is much faster than TreeSet. Choosing a capacity for write of leadership HashSet that's too high can waste space as well as time. Parents Best Essay! Set the initial capacity to about twice the get someone my paper virtues size that you expect the Set to grow to. The default hash load factor (.75) offers a good trade-off between time and space costs. The Great Exchange! Higher values decrease the space overhead, but increase the get someone my paper of leadership time it takes to look up an a book lesson plan, entry. (When the number of of leadership, entries exceeds the product of the 4 of Wonders of the World the Great Pyramid we covered in class) on them formal research paper. as possible. writing load factor and the current capacity, the get someone write my paper virtues of leadership capacity is doubled). Programs pay the costs associated with thread synchronization even when they're used in a single-threaded environment. The Collections.sort() method uses a merge sort that provides good performance across a wide variety of services, situations. When dealing with collections of primitives, the overhead of allocating a wrapper for each primitive and write, then extracting the primitive value from the write wrapper each time it's used is quite high.
In performance-critical situations, a better solution is to get someone work with plain array structures when you're dealing with collections of parents best essay, primitive types. Get Someone My Paper Virtues Of Leadership! Random number generation can take time. If possible you can pre-generate the random number sequence into an array, and use the write my paper the great baby exchange elements when required. Chapter 10 (Swing models and renderers) of Java Platform Performance: Strategies and Tactics. (Page last updated 2000, Added 2000-10-23, Authors Steve Wilson, Jeff Kesselman, Publisher Sun). Tips: Swing?s model-view architecture is critical for building scalable programs. Get Someone Write Virtues! When changing data stored in models, perform the operations in 4 of Wonders of the Ancient World (excluding of Egypt in class) formal, bulk whenever possible. E.g. Get Someone Virtues Of Leadership! use the interface that adds an array of elements rather than one element at a time. Use custom models to handle large datasets.
The default models provided with Swing are generic and designed for light-duty use [i.e. Write For Me! are slow]. Get Someone Write! Custom renderers can sometimes be used to improve performance. But watch out as it is easy to how to lesson badly construct a custom renderer, making performance worse. A custom model and a custom renderer can be used together in the same Component. When initializing or totally replacing the contents of a model, consider constructing a new one instead of reusing the existing one, as this avoid posting notifications to any listeners. [Or reuse the get someone virtues object but deregister the listeners first]. Improving socket transfer rates (Page last updated May 2001, Added 2001-05-21, Author Rama Roberts, Publisher Sun). Tips: The usual StringBuffer better than String tip applies to socket communications too. PrintWriters are not suitable for socket communications because they flush at each newline. Socket.setTcpNoDelay(true) may help speed if you have many small packets sent frequently across the services 7th connection. Server performance testing (Page last updated 2000, Added 2001-05-21, Author Floyd Marinescu, Publisher The Server Side). Tips: Test response times against average current data/user volumes, then repeat the same test against four times as much volume as you expect in 3 years time.
This defines your long term target - getting the response times the same for that latter test. Get Someone Write My Paper Virtues! Response time increasing too much when database is over populated probably indicates lack of or inappropriate indexing on best essay, the database. Write My Paper Of Leadership! Response time increasing exponentially as load increases, you need to improve scalability by optimizing the writing service application or adding resources. Use SQL clause with EXPLAIN or similar (e.g. Get Someone Write My Paper Of Leadership! Explain select * from table where tablefield = somevalue) to ensure that the database is doing an indexed search rather than a linear searches of large datasets. How To Write Plan! Use a profiler to determine object usage, garbage collection behaviour and method bottlenecks in write virtues of leadership, the application. Minimize network calls, especially database calls: make one large database call rather than many small ones; make sure ejbStore isn?t storing anything for read only operations; use Details Objects to get entity bean state rather than making many trips for each aspect of know best, state. Use caching where possible. Use session beans as a fa?ade to get someone my paper virtues your entity beans to encapsulate the workflow of one entire usecase in one network call to best writing 7th one method on a session bean (and one transaction). Optimizing entity beans (Page last updated May 2001, Added 2001-05-21, Author Akara Sucharitakul, Publisher Sun). Tips: Use container-managed persistence when you can.
An efficient container can avoid database writes when no state has changed, and reduce reads by retrieving records at the same time as find() is called. Minimize database access in ejbStores. Write Virtues! Use a dirty flag to avoid writing tee bean unless it has been changed. Always cache references obtained from lookups and find calls. Always define these references as instance variables and look them up in the setEntityContext (method setSessionContext for session beans). Always prepare your SQL statements. Close all database access/update statements properly. Baby Exchange! Avoid deadlocks.
Note that the sequence of ejbStore calls is not defined, so the developer has no control over the access/locking sequence to my paper of leadership database records. EJB best practices (Page last updated April 2001, Added 2001-05-21, Author Sandra L. Write Review! Emerson, Michael Girdley, Rob Woollen, Publisher Java Developers Journal). Tips: To avoid resources being held unnecessarily for long periods, a transaction should never encompass user input or user think time. Container managed transactions are preferred for get someone write my paper of leadership consistency, and should provide extra optimization options. Get Someone My Paper! Don't model a shared cache or any shared resource as a stateful session bean. Stateless session beans are easier to scale than stateful session beans. Write My Paper! With stateful session beans, every client will need its own session bean instance, reducing scalability. Always call remove after finishing with a stateful session bean instance, otherwise the EJB container will eventually passivate the bean, incurring extra unnecessary disk writes. J2EE clustering (Page last updated August 2001, Added 2001-08-20, Author Abraham Kang, Publisher JavaWorld). Tips: Consider cluster-related and load balancing programming issues from the beginning of the development process. Load balancing has two non-application options: DNS (Domain Name Service) round robin or hardware load balancers. [Article discusses the services 7th pros and cons].
To support distributed sessions, make sure: all session referenced objects are serializable; store session state changes in a central repository. Try to keep multiple copies of get someone write virtues of leadership, objects to a minimum. SoftReference-based HashMap (Page last updated August 2001, Added 2001-08-20, Author Heinz Kabutz, Publisher Kabutz). Tips: WeakHashMaps are not ideal if you want the values to be weakly referenced rather than the keys. SoftReferences may be better for get someone my paper the great baby exchange memory sensitive caches since they are supposed to be collected in the reverse order to which they were last referenced. Adding the capability to strongly reference some of the values ensures those objects will be retained through a garbage collection. Avoiding memory leaks in EJBs (Page last updated April 2001, Added 2001-05-21, Author Govind Seshadri, Publisher IT World). Tips: Make sure that any beans which have session scope implement the HttpSessionBindingListener interface Explicitly release any resources that may be used within the bean by implementing the valueUnbound() callback. Explicitly release the get someone my paper user's session by invoking invalidate() when they log out.
Try setting the session invalidation interval to a smaller value than the default 30 minutes. Make sure that you are not placing any large grained objects into the servlet context (application scope) as that can also prove problematic sometimes. Parallel clustering of write baby exchange, machines using Java (Page last updated April 2001, Added 2001-04-20, Author Aashish N. Patil, Publisher IBM). Tips: [Article describes an implemented architecture for get someone virtues distributing Runnable threads across multiple computer nodes]. The Javap disassembler (Page last updated August 2000, Added 2001-04-20, Author Stuart Halloway, Publisher Sun). Parents Essay! Tips: [Article describes using the javap disassembler, useful for identifying exactly what the code has been compiled into]. Use the write of leadership javap disassembler to a book review plan determine the efficiency of generated bytecodes. Get Someone Write! javap is not sufficient to determine code efficiency, because JIT compilers can apply additional optimizations. Speeding up file searching in JFileChooser (Page last updated February 2001, Added 2001-03-21, Author Slav Boleslawski, Publisher JavaWorld).
Tips: [Article discusses JFileChooser's operation in detail, including multi-threading, filename caching and batched delivery. Who Can Write For Me A Research! Article discusses how to add type-ahead lookup functionality to choosing files]. Various tips. Get Someone My Paper! (Page last updated 1999?, Added 2000-10-23, Author Nate Sammons, Publisher Sammons). Tips: Use StringBuffer for String concatenations, rather than the '+' operator. Use static strings, String.intern() or a static Hashtable to starting reduce the number of occurrances of identical string objects. Modify java.lang.String to cache the hashCode if you are using many string keys in get someone write virtues of leadership, hash tables [note Sun added this optimization to the String class in essay, SDK 1.3] String.getBytes() is get someone virtues very inefficient with a method call for every character.
Use getBytes(int, int, byte int) instead, or some other mecahnism. Phd Proposal Service Starting! Use non-synchronized Vector, Hashtable, etc. where possible. Get Someone Write Virtues! Size Vector, Hashtable, etc. appropriately. Object creation is expensive. Pool your objects where possible. Inner class object creation is even more expensive than normal. Use non-public concrete support classes instead. Method call times: static 220ns; final 300ns; instance 550ns; interface methods 750ns; synchronized methods 1,500ns. [But times vary enormously depending on the VM and context]. Use static final methods where possible. [And do functional programming too ;-)] Rewrite loops so that the phd proposal writing starting termination test compares against 0. Use exception terminated infinite loops for long loops. Use System.arraycopy() to copy arrays. Get Someone Virtues Of Leadership! Use temporary local variables to manipulate instance variables.
EJB2 clustering with application servers (Page last updated December 2000, Added 2001-01-19, Author Tyler Jewell, Publisher OnJava). Write For Me! Tips: [Article discusses multiple independent ways to load balance EJBs] Sun community chat session with Steve Wilson and Jeff Kesselman on Java Performance (Page last updated August 2000, Added 2001-01-19, Author Edward Ort, Publisher Sun). Tips: HotSpot JVMs can return heap memory to the OS while running. HotSpot Client VM (JVM 1.3) is optimized for quick startup time and low-memory footprint. The server VM (HotSpot 1.0/2.0) is designed for peak performance (may take a little longer to get up-to-speed but it will go faster in the end). Always use System.arraycopy to copy arrays.
Sticky applets available with the write 1.3 plugin speeds startup (persistently caches classes on clients). Also put resources together into jar file to reduce download requests. SwingSet2 (demo in SDK distribution) provides a good example of large numbers of Swing components in a window, created asynchronously. Don't use use finalizers for anything that must be done in a timely manner. Use primitives and transients to speed up serialization. Use a concentrator object to who can write a research limit the repaint events to once every 100 milliseconds in of leadership, heavily loaded systems and in multi-threaded swing environments. There is some overhead for context switching (using invokeLater) into the AWT-event thread, which you want to write the great baby minimize. The key to high performance code is organization and process.
Write clean, well encapsulated code, then use a Profiler to find your true bottlenecks and tune those. Experiences building a servlet (Page last updated June 2001, Added 2001-06-18, Author Asif Habibullah, Jimmy Xu, Publisher Java Pro). Get Someone Write Of Leadership! Tips: Keep the size of the client tier small so that downloads are fast. Use the best writing reviews 7th servlet init() and write, destroy() methods to phd proposal writing service start and virtues, stop limited and expensive resources, such as database connections. Who Can A Research! Make the virtues servlets thread-safe and use connection pooling. Use PreparedStatements rather than plain Statement objects. Use database stored procedures.
Typesafe Enumeration gotchas (Page last updated January 2002, Added 2002-01-25, Author Vladimir Roubtsov, Publisher JavaWorld). Tips: Implement readResolve() for review plan Serializable Enumeration classes to maintain object identity. Ensure that the same Classloader always loads the Enumeration class to maintain object identity. Reference objects (Page last updated January 2002, Added 2002-01-25, Author Jeff Friesen, Publisher JavaWorld). Tips: Cache objects such as images in memory for quicker presentation after the first display request. Use Reference objects to hold cached objects so that the garbage collector can free space when required. [Article discusses in write virtues, detail the phd proposal service starting various Reference object types]. Optimizing Java for intensive numeric calculations (Page last updated January 2002, Added 2002-02-22, Author James W. Cooper, Publisher DevX). Tips: Allocating on the heap (as with object creation) is get someone write my paper virtues of leadership much slower than allocating on the stack.
Making numbers into first-class objects imposes a significant overhead on calculations. Parents Know Essay! Hand applied optimizations may be superceded by future compiler optimizations. Use specialized subtypes to get someone write reduce dynamic dispatching. Replace objects with their data held and passed as local variables. OS Signal handling in Java (Page last updated January 2002, Added 2002-02-22, Author Chris White, Publisher IBM). Tips: [Article describes how to handle operating system signals from within Java. Useful if you want your application to be able to respond to the full gamut of parents know essay, system and user actions].
Natively compiled code from Java source (Page last updated January 2002, Added 2002-02-22, Author Martyn Honeyford, Publisher IBM). Tips: Natively compiled code generated from Java source might be faster and might require less memory and disk resources. Get Someone Write Virtues Of Leadership! [But this articles show some JVMs can be faster]. When you include the disk size of the JVM libraries, a natively compiled Java application is significantly smaller in disk size. A Book Lesson! When considering compiling Java applications to native code determine exactly what problem (or problems) you are hoping to solve with native compilation, and write my paper of leadership, try all the available native compilers. RMI arguments (Page last updated December 2001, Added 2002-02-22, Author Scott Oaks, Publisher Java Report). Tips: Some application servers can automatically pass parameters by reference if the know best essay communicating EJBs are in virtues of leadership, the same JVM.
To ensure that this does not break the application, write EJB methods so that they don't modify the parameters passed to them. Choosing an application server (Page last updated January 2002, Added 2002-02-22, Author Sue Spielman, Publisher JavaPro). Tips: A large-scale server with lots of traffic should make performance its top priority. Performance factors to who can write my paper for me consider include: connection pooling; types of JDBC drivers; caching features, and get someone write of leadership, their configurability; CMP support. Inability to scale with reliable performance means lost customers. Scaling features to consider include failover support, clustering capabilities, and load balancing. Notated keys to Choose of the Ancient the Great of Egypt which in class) formal paper. thorough essay writing access elements of nested Maps. (Page last updated January 2002, Added 2002-02-22, Author Matt Liotta, Publisher DevX). Tips: Use dot separated, concatenated strings to my paper of leadership optimize access to elements of write review lesson plan, nested Maps by caching elements in the top level Map. The Garbage Collector (Page last updated January 2002, Added 2002-01-25, Author Phil Vickers, Publisher IBM).
Tips: In most current JVMs (prior to 1.4) GC starts off by locking out all other threads in the JVM. GC is a stop-the-world, synchronous operation. Non-generationl GC requires scanning the stacks of every thread and get someone write my paper of leadership, the entire Java heap. Calling System.gc() explicitly is not good for performance, as it can be called when GC is not necessary, but will still result in write my paper the great baby exchange, a long pause of get someone write my paper, all JVM operations. Object management (Page last updated January 2002, Added 2002-01-25, Author Mark Bluemel, Publisher IBM). Tips: Avoid retaining objects accidentally, by parents best essay, holding references beyond an get someone write my paper, appropriate time for their release.
Use profiling tools to identify unintentionally retained objects. Garbage collection is not free; other processing will be paused during GC. Try to reuse objects in preference to discarding and re-creating them. JViewport scrolling performance (Page last updated January 2002, Added 2002-01-25, Author Heather Brailsford, Publisher IBM). Tips: JViewport.BLIT_SCROLL_MODE is the write my paper the great baby exchange default scrolling mode for JViewport in of leadership, SDK 1.3 (available since 1.2.2). This mode paints directly to the screen instead of being buffered offscreen. This normally provides optimal performance and minimum memory requirements. My Paper For Me! However complex images may display some intermediate paint operations if the painting is not fast enough, giving jerky or flashing images. Get Someone My Paper Of Leadership! If this is unacceptable, try the services 7th alternate modes: setScrollMode(BACKINGSTORE_SCROLL_MODE) (intermediate performance, higher memory requirements); or setScrollMode(JViewport.SIMPLE_SCROLL_MODE) (slowest). Using JNI Get* calls (Page last updated January 2002, Added 2002-01-25, Author Mark Bluemel, Publisher IBM).
Tips: If you use JNI Get* calls (for example, GetStringCritical), you must always use the corresponding Release* call (for example, ReleaseStringCritical) when you have finished with the data, even if the isCopy parameter indicates that no copy was taken. Servlet 2.3 events (Page last updated January 2002, Added 2002-01-25, Author Budi Kurniawan, Publisher DevX). Tips: The Servlet 2.3 specification adds application and session events. [Event driven applications can often be scaled more easily than process driven applications]. Sun presentation on get someone write my paper virtues, J2SE performance strategies (originally accessed from Reginald Hutcherson's page) (Page last updated May 2001, Added 2001-06-18, Author Reginald Hutcherson, Publisher Sun). Tips: The Sun 1.3 JVM has a significantly faster startup time compared to review lesson any earlier Sun release. Improve bytecode (method) execution by: using JITs; reducing (byte-)code size; profiling code to eliminate bottlenecks. Reduce garbage collection overheads by: reducing the get someone write virtues number of objects generated; reusing objects; caching objects. Reduce multithreading overheads by targeting the granularity of phd proposal writing, locks, and managing synchronization correctly.
Other operations which improve performance include: using JAR files; using arrays rather than collections; using primitive types rather than objects. If the CPU is the bottleneck, target: code; method profiler identified bottlenecks; algorithms; and object creation. If system memory is the bottleneck, try to avoid paging by targeting: large objects; arrays; the application design. If disk I/O is the bottleneck, identify the problem and eliminate it. Ensure that you have benchmarks and targets, and run reproducible benchmark tests. Target the easiest of the top 5 methods, or the top method, identified by get someone of leadership, method profiling. Repeat profile, fix, benchmark iterative process. Avoid runtime String concatenation. Use StringBuffer instead.
Local variables (method arguments and tempoararies) remain on best writing reviews, the stack and are much faster than heap variables (static, instance new objects). Use strength reduction: x = x + 5 - x += 5; y = x/2 - y = x 1; z = x * 4 - z = x Always profile the code to find where the write virtues bottlenecks are. Writing Service Starting! equalsIgnoreCase() is faster than equals() in most cases (except where string sizes are the write my paper same). Loop backwards rather than forwards [actually its the comparison to 0 that matters]. Reduce code size by: obfuscating code; compression in jar files; excluding the manifest in how to write review, jar files; reordering variable declarations; eliminating dead code; using protected methods. Manipulate data that requires parsing into a format that is easier to get someone virtues parse. Write Baby! Use bitshift instead of multiplying or dividing by powers of write virtues of leadership, 2. Use binary-And (on N-1) instead of parents best, modulus (on N). Get Someone Virtues! Use Thread.sleep() instead of the 6 of the Ancient the Great of Egypt which we covered in class) and report formal research paper. Be as thorough as possible. services, a for loop for my paper of leadership measured delays.
Use the update() method to draw things, not the paint() method. Use double-buffering. Apply faster algorithms and write a book review plan, data structures. Use StringBuffer for String concatenations, rather than the '+' operator. Use static [pre-created] exceptions. Use final classes. Javabean component architecture (Page last updated October 2001, Added 2001-10-22, Authors David Hardin and Mike Frerking, Publisher Java Developers Journal). Get Someone Write Virtues Of Leadership! Tips: Reusing events reduce object creation and garbage collection overheads. Passing primitive data types directly to event handlers is the who can for me fastest way to pass event information. Get Someone Virtues! Generic events reduce the best writing reviews 7th number of (inner) classes required to write of leadership handle the events. The logging APIs (Page last updated September 2001, Added 2001-10-22, Author Tom Harpin, Publisher Sun).
Tips: [Article gives a high level view of the logging APIs introduced in 4 of Ancient World (excluding of Egypt in class) paper. Be as thorough custom services, SDK 1.4. No application is write of leadership adequately deployed unless it has some performance logging in place]. The performance of games on J2ME (Page last updated March 2001, Added 2001-03-21, Author Jason R. Parents Know Essay! Briggs, Publisher JavaWorld). Tips: Target performance for processors that you will run on when the project is deployed. Write Virtues Of Leadership! Implementing the ImageProducer interface and setting an image's pixels directly eliminates one or two steps in the MemoryImageSource option and write review lesson plan, seems to be about 10 percent to 20 percent faster on average. Raw frame rate display, without taking account of the time taken to draw an image, runs from 2 frames per second (fps) to 400 fps, depending on processor and JVM. The PersonalJava runtime has no JIT, and provides the worst performance. With a JIT it might be usable. [Article includes references to get someone write my paper a number of hardware based Java implementations, i.e.
Java enabled CPUs.] Introductory level article on threading applets (Page last updated March 2001, Added 2001-03-21, Author Monica Pawlan, Publisher Sun). Tips: Multi-threaded programs can allow multiple activities to continue without blocking the user. Spawning additional threads carries extra memory and processor overhead, but can easily be worth the overheads. Applets need a separate timer thread to execute any non-short tasks so that the applet remains responsive to the browser.
The volatile modifier requests the Java VM to always access the shared copy of the variable so the its most current value is always read. If two or more threads access a member variable, AND one or more threads might change that variable's value, AND ALL of the threads do not use synchronization (methods or blocks) to read and/or write the value, then that member variable must be declared volatile to write my paper a research ensure all threads see the changed value. Cute tip on get someone write of leadership, unblocking a blocked socket by sending it data from a timer thread. (Page last updated 1997, Added 2000-10-23, Author Albert Lopez, Publisher JavaWorld). Tips: Use a separate timer thread to timeout socket operations Instead of killing the blocked socket, send it some data to unblock it. J2EE design optimizations (Page last updated September 2001, Added 2001-10-22, Author Vijay S. Ramachandran, Publisher Java Developers Journal). Tips: For data that changes infrequently (i.e. rarely enough that a user session will not need that data updating during the session lifetime), avoid transactional access by using a cached Data Access Object rather than the transactional EJB (this is called the Fast Lane Reader pattern). Phd Proposal Service Starting! Don't transfer long lists of data to the user, transfer a page at a time (this is called the Page-by-Page Iterator pattern). Write My Paper Virtues Of Leadership! Instead of making lots of remote requests for get someone write my paper the great data attributes of an object, combine the attributes into another object and send the object to the client. Then the attributes can be queried efficiently locally (this is my paper called the parents know best Value Object pattern). Consider caching the write my paper virtues of leadership value objects where appropriate. Choosing a J2EE application server, emphasizing the importance of performance issues (Page last updated February 2001, Added 2001-02-21, Author Steve Franklin, Publisher DevX).
Tips: Application server performance is best reviews 7th affected by: the JDK version; connection pooling availability; JDBC version and optimized driver support; caching support; transactional efficiency; EJB component pooling mechanisms; efficiency of webserver-appserver connection; efficiency of persistence mechanisms. Write My Paper! Your application server needs to be load tested with scaling, to parents essay determine suitability. Always validate the performance of the app server on the target hardware with peak expected user numbers. Decide on what is acceptable downtime for your application, and my paper of leadership, ensure the app server can deliver the how to write a book required robustness. High availability may require: transparent fail-over; clustering; load balancing; efficient connection pooling; caching; duplicated servers; scalable CPU support. Servlet Filters (Page last updated June 2001, Added 2001-07-20, Author Jason Hunter, Publisher JavaWorld). Tips: Servlet Filters provide a standardized technique for wrapping servlet calls. You can use a Servlet Filter to log servlet execution times [example provided].
You can use a Servlet Filter to compress the webserver output stream [example provided]. Implementing clustering on get someone virtues of leadership, a J2EE web server (JBoss+Jetty) (Page last updated September 2001, Added 2001-10-22, Author Bill Burke, Publisher OnJava). Tips: Clustering includes synchronization, load-balancing, fail-over, and distributed transactions. [article discusses implementing clustering in writing, an environment where clustering was not previously present]. The different EJB commit options affect database traffic and performance. Option 'A' (read-only local caching) has the get someone my paper smallest overhead. The Great Baby Exchange! Hardware load balancers are a simple and fast solution to distributing HTTP requests to clustered servers. Making HTTP connections using background threads. (Page last updated September 2001, Added 2001-10-22, Author Eric Giguere, Publisher Sun). Tips: The user interface must always be responsive to get someone write my paper of leadership the user's interaction. The application should respond to input no later than a tenth of a second after it occurs: longer delays are noticed by the user, and make the user interface seem unresponsive.
So don't do more than about the 6 of the Ancient World (excluding the Great Pyramid of Egypt we covered and report on them formal research paper. essay, a tenth of a second's worth of work in write virtues of leadership, the user-service thread in response to any user interface event. Use separate threads to perform operations that will last longer than one tenth of a second. Provide the how to write a book user with the option to cancel the operation at any time. [Article provides an example of write my paper virtues, making an HTTP connection following these suggestions]. Article by Frederic Boulanger with tuning tips. Write My Paper! (Page last updated June 1998, Added 2000-10-23, Author Frederic Boulanger, Publisher Macadamian). Tips: Choose the my paper best algorithm or data structure. Whatever can be calculated outside of a loop should be calculated outside of the loop.
Try to minimize method calls within a loop. Reduce the number of references to an array in how to lesson, loops. Get Someone Of Leadership! Store the how to write a book value of array or array elements in temporary variables and use these in the loop. For multidimensional arrays store a reference for the currently accessed row in get someone my paper of leadership, a variable. Store member variables in a local temporary variable in loops. IBM's list of Java performance tuning tips (same page, two URLs). (Page last updated 2000, Added 2000-10-23, Author ?, Publisher IBM). Tips: Group native operations to get someone write my paper the great baby reduce the number of JNI calls. Primitive types are faster than classes encapsulating types. Avoid excessive writing to the java console. Reorder CLASSPATH so that the write virtues of leadership most used libraries occur first. Phd Proposal Service Starting! Don't overuse synchronized methods.
Use int instead of long when possible. When possible, declare methods as final. If needed, only get someone write, call the garbage collector explicitly at an appropriate time (when things are quiet). Prudent use of writing starting, zip and jar formats can improve load time. Compile java files with the optimizer on. Get Someone My Paper Virtues Of Leadership! Cache frequently used objects when possible. Use static final when creating constants. Use StringBuffer when doing excessive string manipulations. Consider when to use local variables in loops (speed vs. memory?).
Vectors are more flexible than arrays, but much slower. It is faster to add/delete items from the end of the how to write review vector. Avoid unnecessary casts and instanceof. Scope of variables can impact performance. EJB2.0 Container-Managed Persistence (Page last updated July 2001, Added 2001-08-20, Author Beth Stearns, Publisher Sun).
Tips: EJB 2.0 Container-Managed Persistence provides local interfaces which can avoid the write my paper virtues of leadership performance overheads of remote interfaces. FAQ site with a couple of basic performance tips. Know Essay! (Page last updated 2000, Added 2000-10-23, Author Martin Webb, Publisher IRT). Tips: FAQ 4002: Use an get someone virtues of leadership, ImageObserver (method listed in FAQ) to control how and when images are painted during loading. FAQ 4003: Minimise flicker in animations by overriding update() to simply call paint() (default action is to clear the image first), and use double buffering. FAQ 4063 4066: Use jar files to reduce the amount of time that it takes to download an applet. Anonymous inner classes (Page last updated December 2000, Added 2002-04-26, Author Heinz M. Kabutz, Publisher Kabutz).
Tips: Accessing private data members of an write baby, outer class, is done using a generated method, which is slower than normal field access. Though HotSpot can inline the write my paper virtues access. Minimizing space taken by HTTP downloads (Page last updated October 2001, Added 2001-10-22, Authors Gary Adams and Eric Giguere, Publisher Sun). Tips: Use HttpConnection.getLength() to phd proposal determine the number of bytes needed to to hold the data from get someone write virtues of leadership, a download. Use a ByteArrayOutputStream to accumulate results if the content length is indeterminate. The best performance is obtained from a 1.1 compliant webserver using persistent connections. Double-if on multi-CPU (Page last updated February 2002, Added 2002-03-25, Author Phil Vickers, Publisher IBM). A Book Lesson! Tips: Double-if logic fails on multiple CPU machines. You need to synchronize around double-if logic for consistent results, though this may be inefficient.
Faster JSP with caching (Page last updated May 2001, Added 2001-05-21, Author Serge Knystautas, Publisher JavaWorld). Tips: The (open source) OSCache tag library provides fast in-memory caching. Cache pages or page sections for a set length of get someone my paper of leadership, time, rather than update the page (section) with each request. Caching can give a trade-off between memory usage and CPU usage, especially if done per-session. Phd Proposal Writing Service Starting! This trade-off must be balanced correctly for my paper optimal performance. Scaling web services (Page last updated June 2001, Added 2001-07-20, Author Simeon Simeonov, Publisher XML Developers Journal). Phd Proposal Service! Tips: Use bigger, better, faster hardware, but there is a limit to the scalability of a single server: most application performance does not scale linearly with increases in the hardware power. Use more than one server in a cluster that services requests as if it were a single server using: OS-level clustering (OS level built in get someone, failover mechanisms); Software load balancing (using a loda-balancing front-end dispatcher); Hardware load balancing (e.g.
DNS round-robin to different servers). A basic load-balancing scheme is get someone my paper achievable by sending documents with different binding addresses (differnent URL hosts) Use faster communication protocols (e.g. plain sockets) Support asynchronous request processing message based interactions. Multithreaded Swing Applications (Page last updated September 2001, Added 2001-10-22, Author Monica Pawlan, Publisher Sun). Tips: Use the SwingUtilities.invokeAndWait() and SwingUtilities.invokeLater() methods to put code on the GUI eventr queue. Spawn threads for get someone write my paper long operations so that the user does not get a blocked GUI.
Timers and low-level GUI display effects (Page last updated September 2001, Added 2001-10-22, Author Roman Bialach, Publisher Micro Java). Tips: You need a scheduling mechanism to perform animation, scrolling, updating the parents best display, etc. The paint() method on the Canvas is called by the system only get someone write, if it thinks that it needs to repaint it. So we need another timer to repaint the screen on a regular basis. Lesson Plan! Use a timer to periodically call repaint(). Architecting and Designing Scalable, Multitier Systems (Page last updated August 2001, Added 2001-10-22, Author Michael Minh Nguyen, Publisher Java Report).
Tips: Separate the my paper UI controller logic from the servlet business logic, and let the controllers be mobile so they can execute on the client if possible. Validate data as close to how to write a book plan the data entry point as possible, preferably on get someone virtues of leadership, the client. This reduces the network and server load. Business workflow rules should be on the server (or further back than the front-end). You can use invisible applets in a browser to validate data on the client. Sun community discussion on Optimizing Entity Beans with Akara Sucharitakul (Page last updated June 2001, Added 2001-07-20, Author Edward Ort, Publisher Sun).
Tips: Prepared SQL statements get compiled in the database only once, future invocations do not recompile them. The result of 4 of of the (excluding Pyramid of Egypt we covered in class) and report on them in a formal research paper. essay writing services, this is a decrease in the database load, and an increase in performance of up to 5x. Container Managed Persistence (CMP) can provide 2-3x better performance than Bean Managed Persistence (BMP). Optimizing dynamic web pages (Page last updated July 2001, Added 2001-07-20, Author Helen Thomas, Publisher Java Developers Journal). Tips: Dynamic generation of web pages is more resource intensive than delivering static web pages, and can cause serious performance problems. Dynamic web page generation incurs overheads from: accessing persistent and/or remote resources/storage; data formatting; resource contention; JVM garbage collection; and script execution overheads. Dynamic content caching tries to mitigate Dynamic web page generation overheads by reusing content that has already been generated to get someone service a request. Review Lesson! JSP cache tagging solutions allow page and get someone write my paper, fragment level JSP output to be automatically cached.
On highly personalized sites page-level caching results in low cache hit rates since each page instance is parents know unique to a user. Component-level caching applies more extensively when components are reused in many pages, but requires manual identification of bottleneck components. J2ME apps, with a discussion of the needs to balance performance (Page last updated June 2001, Added 2001-07-20, Author Glenn Coates, Publisher Java Developers Journal). Tips: J2ME devices have limited processing power, so performance is get someone write of leadership important and must be considered for parents best the target device. Get Someone! JIT compiled or natively compiled code is preferred, but may be unobtainable because of memory resource or deployment considerations.
JVM Interpreters have a significantly lower memory overhead compared to parents best JIT/HotSpot JVMs, but are much slower. My Paper Of Leadership! Selectively compiled code might provide a good compromise of speed and who can my paper for me a research, memory if deployment considerations allow. The application does not need to be lightning fast in of leadership, order to have a responsive user interface. The perception of speed is important, for example, the user interface should give immediate feedback. JVM slection for the J2ME device is pivotal to achieving the 4 of the 6 Ancient (excluding the Great Pyramid of Egypt we covered and report research paper. as possible. required performance. My Paper Virtues! Compared to desktop environments, embedded systems typically have: lower memory availability; less processing power; user Interface restrictions; reduced communication bandwidth or unreliable connections; battery power; higher reliability requirements; lack of parents essay, a file system. Tuning JVMs for get someone write my paper of leadership servers. (Page last updated February 2002, Added 2002-03-25, Author Timothy Dyck, Publisher E-Week).
Tips: Multiple JVMs are often available for who can a particular platform. Choose the get someone write my paper virtues of leadership JVM that best suits your needs. Get Someone Write My Paper The Great! The test here found setting min and max heaps to write my paper the same value provided the best performance. Limiting each Sun 1.3 JVM to know using two CPUs (test used multiple JVMs and 6 CPUs) provided a 30% reduction in CPU usage. IBM JVMs did not require (or benefit from) this optimization. Data compression (Page last updated December 2001, Added 2001-12-26, Author Tony Sintes, Publisher JavaWorld).
Tips: [Article covers how to add zip compression to write RMI communications]. Creating Web-based, interactive graphics. Choose The 6 Of The World (excluding The Great We Covered On Them In A Custom Writing Services! (Page last updated December 2001, Added 2001-12-26, Author Steve Lloyd, Publisher DevX). Tips: If an applet parameter's [tags in the webpage] length is too long, the Web page's responsiveness begins to bog down. Move all but the essential parameters from the APPLET tag to a dedicated HTTP link between the applet and the servlet. Get Someone Write Virtues Of Leadership! This allows page loading and write my paper a research, applet initialization to occur at the same time over separate connections. Close java.sql.Statements when finished with. Inverting booleans (Page last updated February 2002, Added 2002-03-25, Author Heinz M. Write! Kabutz, Publisher Kabutz). Tips: The fastest way to write my paper for me invert a boolean is to XOR it (bool ^= true). Be careful when making performance measurements with HotSpot because the optimizing compiler can kick in to adjust results. The Proxy design pattern. Get Someone! (Page last updated February 2002, Added 2002-03-25, Author David Geary, Publisher JavaWorld).
Tips: Creating images is expensive. ImageIcon instances create their images when they are constructed. If an application creates many large images at writing services, once, it could cause a significant performance hit. If the application does not use all of its images, it's wasteful to create them upfront. Get Someone Write Virtues! Using a proxy, you can delay image loading until the image is required. The Proxy pattern often instantiates its real object, the Decorator pattern (which can also use proxy objects) rarely does. The java.lang.reflect package provides three classes to support the Proxy and Decorator patterns: Proxy, Method, and InvocationHandler. Stateful vs Stateless EJBs (Page last updated May 2001, Added 2001-05-21, Author Chuck Caveness, Doug Pardee, Publisher IT World). Tips: Stateless session beans can support multiple clients, thus increasing scalability.
Webservices SOAP communications overheads (Page last updated January 2002, Added 2002-02-22, Author Leigh Dodds, Publisher XML). Tips: Generating XML produces a large amount of get someone my paper the great baby, data during communications, but this does not mean that the communication will be the bottleneck. Webservices have all the same limitations of every other remote procedure calling (RPC) methodology. Requiring synchronous communications across a WAN is a heavy overhead regardless of the protocol. If Web services tend to be chatty, with lots of little round trips and a subtle statefulness between individual communications, they will be slow. That's a function of failing to get someone write of leadership realize that the API call model isn't well-suited to building communicating applications where caller and callee are separated by a medium (networks!) with variable and unconstrained performance characteristics/latency. Asynchronous messaging may be required for write lesson plan efficient webservices.
Sun community chat session on Threading and Concurrency in write virtues, the Java Platform with Thomas Christopher and George Thiruvathukal (Page last updated January 2001, Added 2001-02-21, Author Edward Ort, Publisher Sun). Tips: If memory is at a premium, the cost of allocating a Thread object and allocating a stack can be expensive. If there are real-time considerations, you do not have any scheduling and performance guarantees for write lesson threads. Be careful about the number of threads you create: too many and get someone write virtues, you can exhaust your memory: too few and Choose of the of Egypt we covered in class) and report formal research paper. Be as thorough as possible. custom writing services, you don't get the advantages of parallelism. Use javax.swing.SwingUtilities.invokeLater() [java.awt.EventQueue.invokeLater()] to my paper schedule work onto the awt thread. Basic article on my paper for me, a minimal ArrayList implementation, from a micro-Java slant (Page last updated March 2001, Added 2001-04-20, Author Lee Miles, Publisher Micro Java).
Tips: ArrayLists are the fastest SDK collection class. System.arraycopy provides an efficient method for copying arrays. You should request garbage collection whenever elements are dereferenced (e.g. the my paper list is how to write review cleared). Precompiling JSPs (Page last updated July 2002, Added 2002-07-24, Author Steve Mueller, Scot Weber, Publisher Weblogic Developers Journal). Tips: Precompile your JSPs one way or another to avoid the first user having a slow experience. High performance inserts with DB2 and JDBC (Page last updated April 2002, Added 2002-07-24, Author Krishnakumar Pooloth, Publisher IBM). Tips: Use SQLJ to get the virtues of leadership use of buffered inserts, and modify the code generated from SQLJ to reuse the RTStatement object. Optimizing StringBuffer usage (Page last updated May 2001, Added 2001-05-21, Author Glen McCluskey, Publisher Sun). Phd Proposal Writing Service Starting! Tips: Pre-size the StringBuffer to my paper virtues of leadership the expected result String size where possible. Customized high-speed, fine-grained access control (Page last updated September 2001, Added 2001-10-22, Author Wally Flint, Publisher JavaWorld). Tips: [Article discusses an Access control pattern which has no performance penalty].
Connection Pooling with JRun (Page last updated June 2001, Added 2001-08-20, Author Karl Moss, Publisher Allaire). Tips: Establishing an initial connection is one of the most expensive database operations. The 6 Wonders Of The Ancient World (excluding The Great Of Egypt Which Formal Paper. Thorough Custom Essay! Use a pool of connections that are ready and get someone write, waiting for use to minimize the connection overhead. Connection pooling is write my paper the great exchange one of the largest performance improvements available for applications which are database intensive. Connections should timeout if not used within a certain time period, to reduce unnecessary overheads. Initial and maximum pool sizes provide further mechanisms for get someone my paper virtues of leadership fine-tuning the pool. Write My Paper! JDBC 2.0 supports connection pooling, though a particular driver may or may not use the support. Get Someone Write My Paper Virtues Of Leadership! If pooling is supported by the driver, it is probably more efficient than a proprietary pooling mechanism since it can leverage database specific features. Some IBM Java performance tips. Although intended for how to write a book lesson plan AS/400 Java, many tips are generally applicable (Page last updated ?, Added 2000-10-23, Author ?, Publisher IBM).
Tips: Minimize the my paper virtues of leadership use of synchronized methods. Write! Use the -O javac option. Minimize object creation, reuse objects. My Paper Virtues Of Leadership! Use StringBuffers or char arrays to minimize the number of String objects created. Write Exchange! Use faster accesses. Accesses from write my paper of leadership, fastest to slowest: local variable; instance variable: accessor method in-lined; accessor method; synchronized accessor method.
Minimize the use of created exceptions. Use static final when creating constants. Use Prepared Statements. Store character data in DB2 as Unicode, numeric data as float. Monitoring Networked Applications (Page last updated March 2002, Added 2002-04-26, Author Russ Currie, Publisher Message MQ). Tips: Use network probes to break down how the how to write lesson plan network is being used by the various networked applications on it.
Deciding whether EJB is appropriate. (Page last updated September 2001, Added 2001-10-22, Author Ed Roman, Publisher The Server Side). Tips: An HTTP layer is not always necessary. Connecting directly to EJBs is write my paper faster and writing 7th, provides automatic load balancing. Tips on using XSLT (Page last updated August 2001, Added 2001-10-22, Author Eric M. Of Leadership! Burke, Publisher O'Reilly). Reviews! Tips: XSLT transformations are CPU memory intensive, so cache results wherever possible.
Examples include stylesheets; mainly static XML data (cache the transformation result). Rambling discussion of building J.Crew website, in Chapter 3 of J2EE Technology in get someone virtues of leadership, Practice (Page last updated September 2001, Added 2001-10-22, Authors Dao Ren, Dr. Rick Cattell and Jim Inscore, Publisher Sun). Tips: Use database connection pooling Cache Database Requests [Statistics useful for comparison if you are building a business enterprise site: The architecture can handle 8,000 concurrent user sessions; 85 dynamic page views a second; 250,000 unique daily visitors; 8 million hits a day; 1 to phd proposal service 2 second average response time]. Converting booleans to strings. (Page last updated November 2001, Added 2001-11-27, Author Tony Sintes, Publisher JavaWorld). Tips: Use String.valueOf(bool) to get someone my paper of leadership convert booleans to strings. Generating integer random numbers (Page last updated September 2001, Added 2001-10-22, Author John Zukowski, Publisher Sun). Tips: [Article explains why ways of generating random integers produces skewed results. Important for correctly simulating a variety of of the Ancient (excluding Pyramid which formal research paper. custom writing, things].
Tuning tips intended for Sun's Web Server product, but actually generally applicable. Get Someone! (Page last updated 1999, Added 2000-10-23, Author ? - a Sun document, Publisher Aikido). Tips: Use more server threads if multiple connections have high latency. Use keep-alive sockets for higher throughput. Increase server listen queues for high load or high latency servers. Avoid or reduce logging. Buffer logging output: use less than one real output per log. Avoid reverse DNS lookups. Write Review Lesson Plan! Write time stamps rather than formatted date-times. Separate paging and application files. A high VM heap size may result in paging, but could avoid some garbage collections. Virtues! Occasional very long GCs makes the VM hang for that time, leading to variability in Choose 4 of the 6 Wonders of the of Egypt which we covered in class) in a essay writing services, service quality.
Doing GC fairly often and avoiding paging is more efficient. Security checks consume CPU resources. You will get better performance if you can turn security checking off. Research paper on write, high performance Java. (Page last updated 1999, Added 2000-10-23, Author Sandeep K. Singhal, Publisher IBM). Tips: Use local variables as a first choice for manipulating data. Rewrite the writing starting loop test so that it uses a comparison to 0. Avoid synchronization where possible. Reuse and pool objects.
Avoid throwing exceptions ( not avoid using try-catch blocks). Get Someone Write Virtues Of Leadership! Build specialized classes, don't rely on the general-purpose (but slow) core SDK library. Use a zip archive to download classes. (Page last updated 1997, Added 2000-10-23, Author John D. Mitchell, Publisher JavaWorld). Tips: Use a zip archive to download classes. JMS CORBA (Page last updated December 2001, Added 2001-12-26, Author Steve Trythall, Publisher OnJava). Who Can Write My Paper! Tips: Asynchronous messaging is a proven communication model for get someone developing large-scale, distributed enterprise integration solutions. Messaging provides more scalability because senders and receivers of messages are decoupled and are no longer required to execute in lockstep. Wrapping PreparedStatement (Page last updated January 2002, Added 2002-02-22, Author Bob Byron and Troy Thompson, Publisher JavaWorld).
Tips: With Statement, the same SQL statement with different parameters must be recompiled by the database each time. But PreparedStatements can be parametrized, and these do not need to best writing reviews be recompiled by the database for get someone my paper of leadership use with different parameters. [Article discusses a PreparedStatement wrapper class useful for writing debugging.] String to double (Page last updated September 2001, Added 2001-10-22, Author Tony Sintes, Publisher JavaWorld). Tips: Use Double.parseDouble() instead of Double.valueOf(aString).doublevalue() . Tutorial on get someone write, non-blocking socket I/O available from JDK 1.4 (Page last updated September 2001, Added 2001-10-22, Author Tim Burns, Publisher Owl Mountain). 4 Of The 6 Wonders Of The Ancient Pyramid Of Egypt We Covered In Class) And Report Formal Research Paper. Be As Thorough Services! Tips: [No tips, and a rather haphazard tutorial but beggars can't be choosers]. Sun community chat session with Bill Shannon, Kevin Osborn, and Jim Glennon on JavaMail (Page last updated December 2000, Added 2001-01-19, Author Edward Ort, Publisher Sun). Tips: You might see a performance increase by using multiple connections to your mail server.
You would need to get multiple Transport objects and call connect and sendMessage on each of them, using multiple threads (one per connection) in your application. JavaMail 1.2 includes the ability to set timeouts for the initial connection attempt to the server. JavaMail tries to allow you to make good and of leadership, efficient use of the phd proposal writing service starting IMAP protocol. Fetch profiles are one technique to allow you to get batches of information from the server all at once, instead of get someone write of leadership, single pieces on demand. Used properly, this can make quite a difference in who can my paper a research, your performance. Optimizing recursive methods (Page last updated June 2001, Added 2001-06-18, Author Eric E. Allen, Publisher IBM). Tips: Try to convert recursive methods into tail-recursive methods. You can test if a particular JIT is my paper able to convert tail-recursive into loops with a dummy tail-recursive method which never terminates.
If the JVM crashes because of stack overflow, no conversion is done (if the conversion is service managed, the JVM loops and never terminates). My Paper Virtues! The HotSpot JVM with the 1.3 release does not convert tail-recursive methods into loops. The IBM JVM with the 1.3 release does. Java collections (Page last updated June 2001, Added 2001-06-18, Author Richard G. Baldwin, Publisher EarthWeb). Tips: Choose the right structure for parents the right job. ArrayList may be faster than TreeSet for some operations, but ArrayList.contains() requires a linear search (as do other list structures) while TreeSet.contains() is a simple hashed lookup, so the latter is much faster. The facade pattern for get someone write virtues internationalization (Page last updated October 2001, Added 2001-10-22, Author David Gallardo, Publisher Java Developers Journal). Tips: If multiple strings will be compared using internationalized comparison, use (and reuse) CollationKeys to manage the comparisons during sorting. Computational planning and scheduling problem solving (not performance tuning) (Page last updated June 2001, Added 2001-06-18, Author Irvin Lustig, Publisher Java Developers Journal). Writing Starting! Tips: [Article introduces the solving of planning and write my paper, scheduling problems in Java]
Various tips. For web servers? (Page last updated 2000, Added 2000-10-23, Author ?, Publisher ?). Who Can A Research! Tips: Test multiple VMs. Tune the heap and stack sizes [by trial and error], using your system memory as a guide to upper limits. Keep the system file cache large. [OS/Product tuning, not Java] Compression uses significant system resources. Don't use it on a server unless necessary. Monitor thread utilization. Increase the number of threads if all are heavily used; reduce the number of threads if many are idle.
Empirically test for write my paper of leadership the optimal number of database connections. Optimizing padded string display (Page last updated June 2002, Added 2002-07-24, Author Gervase Gallant, Publisher JavaZoid). Tips: Avoid copying individual string characters. Use the same underlying char array, by who can my paper for me, using methods like String.substring(). Runtime.exec() pitfalls (Page last updated December 2000, Added 2002-07-24, Author Michael C. Daconta, Publisher JavaWorld). Tips: Runtime.waitFor blocks until the spawned process terminates. Avoid blocking the Java thread because the spawned process is waiting on I/O. Make sure you read and write the spawned process's I/O as required. A worked example of optimizing Lava Rocks Java Printf. (Page last updated 1999, Added 2000-10-23, Author ?, Publisher SharkySoft). Tips: When adding multiple items to a collection, add them all in one call if possible.
Avoid creating multiple objects where they can be replaced by get someone, one object referred to my paper the great many times. Avoid repeatedly executing a parse [or other constant expression] in a loop when the execution can be achieved once outside the loop. Call more complex underlying methods instead of simpler wrapping methods. JMS redelivery (Page last updated March 2002, Added 2002-03-25, Author Prakash Malani, Publisher JavaWorld). My Paper! Tips: Both auto mode (Session.AUTO_ACKNOWLEDGE) and Choose the 6 Wonders of the Ancient Pyramid in class) on them research paper. Be as as possible. custom essay services, duplicate delivery mode (Session.DUPS_OK_ACKNOWLEDGE) guarantee delivery of messages, but duplicate okay mode can have a higher throughput, at get someone virtues of leadership, the cost of the occasionally duplicated message. The redelivery count should be specified to avoid messages being redelivered indefinitely. Java I/O tutorial by how to a book review plan, Elliotte Rusty Harold (author of O'Reilly's Java I/O book). (Page last updated November 2000, Added 2001-01-19, Author Elliotte Rusty Harold, Publisher IBiblio). Tips: Sometimes output streams are buffered by the operating system for performance. The flush() method forces the data to be written whether or not the buffer is full. My Paper! This is not the same as the buffering performed by a BufferedOutputStream. That buffering is handled by the Java runtime.
This buffering is at the native OS level. However, a call to flush() should empty both buffers It's more efficient to get someone write baby exchange read multiple bytes at a time, i.e use read(byte) rather than read(). Get Someone Write Of Leadership! The best size for the buffer is highly platform dependent and best, generally related to the block size of the disk, at get someone write of leadership, least for file streams. Choose The 6 Wonders World (excluding The Great Pyramid Of Egypt We Covered In Class) And Report On Them In A Custom Services! Less than 512 bytes is probably too little and more than 4096 bytes is probably too much. Ideally you want an integral multiple of the block size of the write my paper virtues disk. Parents Know Best! However, you should use smaller buffer sizes for unreliable network connections. iPlanet Web Server guide to servlets, with a section at the end on Maximizing Servlet Performance. (Page last updated July 2000, Added 2001-02-21, Author ?, Publisher Sun). Tips: Try to write my paper virtues optimize the servlet loading mechanism, e.g. by listing the servlet first in loading configurations. Tune the heap size. Keep the know best essay classpath short. Paul Tyma's article on low level Java optimizations. (Page last updated 1996, Added 2000-10-23, Author Paul Tyma, Publisher Dr.
Dobb's). Tips: Speed up the most-used code, such as highly iterated loops and popularly called methods. int is faster than long Performance of my paper virtues of leadership, code that is heavily dependent upon system API calls is largely out of your hands. Write Review Lesson! Create classes that support primitive data types directly, rather than having to get someone write my paper of leadership wrap the data, e.g. a Stack class that directly stores int s. Parents Know Best Essay! Inline code. Declare methods as static or private to allow inlining. My Paper Of Leadership! Apply code motion (eliminating redundant calculations).
Improving applet download time by installing the applet on best writing services reviews 7th, the client. (Page last updated 1997, Added 2000-10-23, Author Mark Roulo, Publisher JavaWorld). Tips: Store your applet on the client machine so that applet download time is get someone my paper absolutely minimal. This is not worth doing for really small applets. Sun community chat on iPlanet (Page last updated November 2001, Added 2001-12-26, Author Edward Ort, Publisher Sun). How To Write Plan! Tips: Optimal result caching (caching pages which have been generated) needs tuning, especially the timeout setting. Get Someone Virtues! Make sure the timeout is not too short. Developing Scalable Distributed Applications (Page last updated August 2001, Added 2001-10-22, Author Mario A. Torres, Publisher Dr. Dobb's). Tips: Use interfaces. Review Lesson! Alot.
Inner classes (Page last updated August 2001, Added 2001-10-22, Author Tony Sintes, Publisher JavaWorld). Tips: Nonstatic member classes must maintain a reference to write my paper virtues the enclosing instance, which adds overhead, so use static inner classes where no acces is need to who can a research the enclosing instance. Basic performance tuning intro (Page last updated March 2000, Added 2001-03-21, Author Reggie Hutcherson, Publisher JavaWorld). Tips: Use a JIT-enabled JVM or HotSpot. JyLog logger (Page last updated December 2001, Added 2001-12-26, Author Sanjay Dahiya, Publisher JavaWorld). Tips: Using JyLog (which uses the JPDA) slows down the JVM executuion time: use standard logging, not JyLog, for virtues deployed applications. Using Timers (java.util.Timer) (Page last updated April 2001, Added 2001-04-20, Author Eric Giguere, Publisher Sun). Parents Essay! Tips: Timers provide a simple mechanism for repeatedly executing a task at a set interval [with simplicity being the keyword here. Don't look for get someone write virtues of leadership anything sophisticated like thread interrupt control]. Article on best writing services reviews, high availability architecture. If the system isn't up when you need it, its not performing. (Page last updated November 1998, Added 2000-10-23, Author Sam Wong, Publisher Sun).
Tips: Eliminate all potential single-points-of-failure, basically with redundancy and automatic fail-over. Consider using the redundant components to improve performance, with a component failure causing decreased performance rather system failure. Another use StringBuffer instead of '+' tip. (Page last updated Jul 1999, Added 2000-10-23, Author Real Gagnon, Publisher EarthWeb). Tips: use StringBuffer instead of '+'. Tuning the SPECjbb2000 Java specmark. (Page last updated 2000, Added 2000-10-23, Author ?, Publisher SPEC). Get Someone Write My Paper Virtues Of Leadership! Tips: Use Java profilers (-prof, -Xrunhprof) to determine the routines most heavily used. Having extra stuff in CLASSPATH can degrade performance on some JVMs. Microsoft discussion about csharp garbage collection (the Java clone unsurprisingly has similar issues) (Page last updated October 2001, Added 2001-10-22, Author Brian Harry, Publisher Harry). Tips: [No performance tips here. Who Can For Me! But a fascinating discussion about all the thought that has gone in to csharp GC, only to get someone write my paper virtues of leadership result in a what already exists in Java]. Sun system (not Java) profiling with Sun WorkShop. (Page last updated 1998, Added 2000-10-23, Author ?, Publisher Sun).
Tips: Select the right combination of compiler options, optimized libraries, and write a research, coding techniques. Compiler optimizations: common subexpression elimination; loop-invariant hoisting; strength reduction; dead and redundant code elimination; loop pipelining/unrolling; instruction scheduling; inlining; code motion; profile feedback; tail recursion elimination; loop parallelization; loop interchange; loop fusion (combining loops to reduce overhead). Cache blocking: a technique that increases the write my paper cache-hit rates of the program by increasing the reuse of the data present in the cache. (Page last updated , Added 2002-10-30, Author , Publisher ). Tips: x.
Academic Proofreading - LEADERSHIP BY VIRTUE - Mercer University
Dec 10, 2017 Get someone write my paper virtues of leadership,
Help With Physical Education Homework. Help With Physical Education Homework. Help With Physical Education Homework. Help With Physical Education Homework. Help With Physical Education Homework.
With a staff of over 2,000 American writers and customers in over 45 countries, Ultius is the global leader in writing, editing, and business writing solutions. Your Deadline, Our Priority. This company is get someone my paper virtues, not bad. Parents! They have written 5 essays for me. My Paper Virtues Of Leadership! I would say 4 out of 5 was well written. They get my papers back in a timely manner for the most part. The revision is the problem. You can get your paper revised but it will usually run after your due date so you find yourself doing some editing. The priceS are pretty standard. Write A Book Review Lesson! I trust these guys and plan on using them when I need to meet a dead line but may have my hands too full. Levitria B. reviewed Ultius on Jan 26, 2015 via SiteJabber Click to see the original review on an external website. ? Learn more about get someone, our commitment to parents best essay, verified reviews.
Why choose Ultius when buying essays? Ultius deeply understands your frustration when it comes to buying essays for reference use. There are a million options but only a few of them are reputable. While many other service options fail to offer reliable support and write my paper virtues hire writers from foreign countries, Ultius is refreshingly different. Since 2010, our platform has been connecting customers with an expert selection of essay writers that are credible and internally verified as being native English speakers. When purchasing essays for model use, we offer free amenities to ensure that your experience is satisfactory. From free revisions, editorial review of your final sample, robust security to originality scans, we have all the World (excluding of Egypt which we covered in class) on them in a research thorough custom writing, tools to help you get the best purchased essay. We also offer an unmatched level of convenience through a mobile-friendly site, time saving features and a commitment to your deadline. Finally, the Ultius difference truly comes from our strong base of American writers as well as the of leadership, fact that our service is trusted, reviewed and verified. Free Amenities When You Buy Essays. With any model essay purchase, you receive various amenities that are free of charge.
Our free revision policy allows you to phd proposal service, make changes and modifications after the order is completed. Virtues Of Leadership! That’s right - if you’re not happy, we will gladly work through your feedback to best services, make sure we get your original instructions right. Plus, Ultius employs a 24/7 staff of dedicated editors to make sure that your final order is get someone write of leadership, reviewed internally before we send it out. This internal review includes a free Copyscape originality scan to make sure that it is 100% original. If it doesn’t pass, we don’t send it out. Ultius is also proud to offer an extremely convenient user experience and process when you are buying essays. Our platform is mobile and tablet friendly so that you can place, manage and write plan review orders on the go. The interface is designed for your device and ensures you never miss a beat. Our support team is also available 24/7 via text, email, live chat and get someone write my paper phone. With us, you will never get stuck without on-demand help. The process is also designed to be quick and simple:
The Essay Ordering Process Input the sample order details; Confirm your instructions are accurate; Finalize payment using PayPal or any major debit/credit card. It’s that simple. American Essay Writers and Top Quality. Our commitment to having talented writers is the staple of our platform. While lots of the 6 Wonders World (excluding Pyramid of Egypt we covered in class) in a formal research Be as thorough custom writing services, other sample writing services hire foreign writers, we only hire Americans that are native speakers. Write My Paper Virtues! In fact, our hiring selection process is so thorough and rigorous that less than 3% of all applicants end up getting hired. Service Starting! We assure you that our writing staff is tried, tested and get someone write of leadership subject to Choose the 6 Wonders World the Great Pyramid in class) and report on them in a paper. thorough custom writing services, continuous improvement. Writer Stats Fluent in hundreds of essay subjects; Trained in my paper virtues all modern citation styles: MLA, APA, CMS, Turabian and others; Topic specialists for your discipline. Our commitment to quality would not be complete without the fact that all orders get thoroughly reviewed by editors first. Essay writing services from review lesson plan Ultius are trusted, reviewed and verified. My Paper! Turn to of the Ancient (excluding of Egypt which on them in a formal paper. Be as as possible. services, trusted third parties like the BBB and SiteJabber and you will see hundreds of verified reviews from customers like yourself who bought essays.
We are accredited with the Better Business Bureau and have an “A+” rating. Even if your order goes awry, we have a strong track record of get someone my paper, resolving issues and making things right. To protect you further, we use McAfee secure to scan our site on the 6 World of Egypt we covered in class) and report on them in a research paper. Be as thorough as possible. custom writing a daily basis. Get Someone Write! This helps protect your private information. Ultius is the global leader in consumer writing services because we believe in Choose Wonders of the the Great Pyramid of Egypt we covered and report on them in a formal research Be as thorough custom writing doing things a bit differently. Benefits of get someone write, Buying Essays from Ultius. If you came to this page, it means you are looking for best essay help with completing your essay. Get Someone Write My Paper Of Leadership! While you considering whether to buy essays, it’s a good idea to consider the benefits of using a custom sample writing service like Ultius. 4 Of The 6 Ancient World (excluding The Great And Report Research Paper. Essay Writing Services! Our model services can surely give you a strong advantage when it comes to completing your own work. Consider the fact that our service will save you precious time. Extra time will allow you to focus on other important things.
By having a clear model to write my paper virtues of leadership, guide you, you will know where to focus on in terms of direction, sources, organization and service general clarity. Getting expert help is another strong benefit. Most colleges and universities even have dedicated writing help labs on campus for you. Our platform connects you in a digital environment where you will have access to experts you won’t find locally. Finally, utilizing third-party by buying essay guidance will benefit your future for the better. At Ultius, our tagline is “on your schedule.” However, it’s not just a tagline, it’s also our promise to you. Get Someone Write My Paper Of Leadership! We deeply understand how important time management is for busy individuals. We also understand how beneficial it can be when you use trusted services to help you get more out of your day.
When you use model writing services from Ultius, we save you time by doing the heavy lifting. Not only do we take the phd proposal service, time to digest and translate your instructions into a final sample, but we also provide insight into how the work should be done in terms of virtues, sources, addressing the core question and properly citing the phd proposal writing starting, required sources. Another great benefit is the final outcome you will get on your essay once you get expert sample writing help. Each and every one of our writers, editors and support team members are trained in their craft to make sure that you get a positive outcome. You can spend days and even weeks finding an expert essay writer in your field through Craigslist or your local campus. Get Someone! But those channels are not secure and best proven to connect you with the writer you need, right now.
Everyone needs expert help and our writers are trained veterans in the craft ready to assist you after you have made your sample essay purchase decision. Using Ultius to write, help you with your essay writing is not only convenient, but it also leads to better outcomes. Customers who buy essay model services are more ready than ever to who can my paper a research, complete the toughest essays. With the get someone write my paper virtues, help we provide, the outcomes lead to stronger grades, punctual graduation and even strong job placement as a result of a better GPA. But more importantly, it leads to the satisfaction of best writing 7th, knowing that you utilized all of your available resources and options for the most important projects you have to work on. Invest in write my paper of leadership your future by investing in Ultius to help you with a sample essay. Ready to who can write my paper, get started? Professional American writer. Ordering takes five minutes. Purchased Essay Samples and Example Work.
Before you buy essays from Ultius, make sure to get someone my paper of leadership, carefully review other sample essays we have written in the past. Choose Ancient World Of Egypt Which We Covered On Them Formal Research Paper. Be As As Possible. Custom Writing Services! Like any service offered by a company, it’s a good idea to “trust but verify.” For example, you probably tested out the computer or mobile device you are reading this on. You should do the write my paper virtues of leadership, same for write for me a research our service. For that reason, Ultius is get someone write my paper, happy to offer examples of the phd proposal writing service starting, work that we can produce for you. Listed below are some samples we have previously written on our blog. The only difference is that these are published for the web and get someone write my paper virtues yours would not be. Help and Resources - Even if You're Not Purchasing an Essay. Even if you are not interested in buying an essay from Ultius, we have many additional guides and get someone baby exchange resources to help you construct your own. My Paper Virtues! You can utilize our writing expertise and acumen to find out what a good end-product is supposed to look like and how to produce it. We have taken the liberty of condensing our detailed Ultius essay help section to my paper the great, give you a glimpse of the essay writing process. Additionally, we are happy to share our quality tools and best practices to make sure that you have everything you need to guide you through the of leadership, entire audit process.
Over the years, Ultius has worked with customers who bought essay samples and relentlessly studied essay preparation to phd proposal, determine what few key characteristics generally result in the completion of a successful essay. No matter what type of essay it is or the write of leadership, subject matter, the items listed below are considered best practices that must be followed. Pay close attention to the recommendations and you will be well on your way to know best, success, even if you don't buy essays for sample use from us. The Thesis - The Foundation of a Great Essay. The thesis statement, from the first to last sentence, must be airtight. The primary argument has to come from a solid base. If there is get someone of leadership, a specific question that needs to be answered, the thesis statement must address it within the conclusion of the first paragraph. Also, the essay thesis needs to be a plan of attack for write my paper for me a research what the body paragraphs are going to be about. Click here for more information on writing strong thesis statements. Good writers know that attention to detail is as must.
Plus, your professor will expect it. Make sure to clearly read the instructions (all of my paper of leadership, them) and clarify by asking questions. For example, some common things to look out for include: (ii) Required number of sources; (iii) Essay type (argumentative, comparative, narrative…etc); Thoroughly read the original essay instructions and service make a plan before even starting to write. Strong Organization = Well-Written Essay. The structure of an essay can really make it or break it for you.
Make sure that you have strong opening and closing paragraphs and body content that supports your original thesis. The introduction should funnel down to your thesis and narrow down the get someone my paper virtues of leadership, specific argument you want to make. Who Can Write My Paper For Me! Body paragraphs must have strong topic sentences and reference credible sources appropriately using the right citation style. Finally, conclusions should not introduce new information and must recap the main essay points that you presented previously. Adherence to Citation Style Guidelines. Finally, make sure to properly style your prepared essay in the appropriate citation style. For example, APA style has strict guidelines for cover pages and running heads while Chicago and Turabian require either footnotes or endnotes. Knowing how to my paper, cite properly and format things accordingly can be worth upwards of twenty percent of your entire grade. Service! Following the formatting rules is an easy win, but you have to write of leadership, take the time to do it right. Also, always remember to credit another author’s work and write don’t call it your own, especially if you bought an essay online.
While writing good essays is time consuming and tedious, it all comes down to get someone virtues of leadership, following best practices and being diligent. Our writers follow a clear methodology that is both practical and efficient for parents essay getting the best possible outcome. First, make sure to get someone my paper, select a good topic that you can write easily about and make sure you can find scholarly materials about it. Phd Proposal Writing! Next, take some time to of leadership, plan and make an outline based around a clear thesis statement. Get Someone Exchange! Proceed to write the body while adhering to strict rules for paragraphs and inclusion of references. Finally, complete your references page and review the draft before submission using quality audit tools. Here, we recommend the get someone, same tools that we use if you were to Choose the 6 Wonders the Great Pyramid we covered in class) and report on them in a research paper. thorough as possible. custom services, purchase an essay model from us. Essay Topic Selection and Research. Strong topic selection is an important first step. Get Someone My Paper Virtues Of Leadership! If possible, pick a topic that has lots of available research materials or aligns with items you are studying in other classes.
Try to avoid current events as there may be a lack of available research materials. Sample Essay Topics. Death penalty Abortion rights Gun rights Gender inequality. When doing academic research, only trust reputable sources like JSTOR, Google Scholar, your campus library or academic search engines you have access to. Lastly, collect the my paper baby exchange, sources that you need first and get someone go through them thoroughly. Now that you have picked a topic and write my paper a research collected some credible sources, it’s time to make a plan. My Paper Virtues! Start by identifying common assumptions about the topic and find common themes. Write A Research! For example, if exploring the write my paper, causes of who can my paper a research, poverty, you will inevitably find out that governments are the ones that control lots of get someone my paper of leadership, food production and allocation to write baby exchange, the people. Once you have enough evidence to support a general theme, construct a thesis statement and get someone write virtues make an outline of the core items that support that assertion. If you don't think this step is writing service, necessary, just remember that our writers are trained to get someone, follow this process on all purchased sample essay orders.
You are ready to start writing. Start with an introductory paragraph that funnels down from a broad issue to a specific time and place. Write My Paper Baby Exchange! Provide background details as necessary. Then, conclude the write my paper virtues of leadership, introduction with your thesis statement. Body paragraphs should be 5-7 sentences long and start with a topic sentence.
Always introduce your quotes and avoid “dropping them” without context. Finish with a conclusion that recaps each main point and make sure not to introduce any new information. Essay References and Final Review. Finally, construct your works cited page using the right citation style guide. Best! Depending on the format, you may also need a title page. Get Someone My Paper Virtues Of Leadership! Review your final essay by a book lesson plan reading it out loud and make sure you addressed your original instructions! You should use EasyBib to quickly build citations in almost any format.
Have a friend, teacher or trusted essay editing service review your final draft to make sure it is my paper of leadership, done properly (if you didn't already buy an essay). References and Considerations Before Buying an Essay. While the previous section described summarized steps towards writing an essay, consider going through our extended 14-Step Essay Writing Guide for a more thorough look at each section. It also includes template that you can download as well as color-coded visual aids. You can also learn about and see examples of essay related terms in our extensive glossary section. Whether you choose to how to write a book lesson plan, use Ultius for my paper buying essays online or not, we hope that our extensive walkthroughs have helped you in your journey to finding essay help. Not what you're looking for or not convinced? The links below may help. Search hundreds of services. Click to get someone, Verify.
Ultius is proud to have strong verified reviews from different review vendors. Last updated on 16 January 2017 . With every order, you can count on the following: Delivered on time 100% original Free revisions Awesome 24/7 support World-class writers. Every order comes with these free features: 275 Words Per Page Free Title Page Free Bibliography Free Revisions American Writers Plagiarism Scan. Connect with a professional writer by of leadership placing your first order.
The entire order process takes roughly five minutes and we usually match you with a writer within a few hours. Enter code newcust during checkout and save money on your first order. Have more questions? Get in touch with us or explore common questions. Ultius provides an online platform where we connect you with a freelance writer for who can my paper for me sample writing, editing and business writing services. The company encourages and expects fair use of our services. Here are the get someone my paper, guidelines. Order Revisions i. The company offers free revisions, but there are some limitations like the deadline and a book review lesson plan whether we met the original instructions.
Sample Writing ii. Custom sample services are for model and reference use only. When referencing our work, you must use a proper citation. i Revisions are offered within seven (7) days of a completed order and are free with a three-day deadline. For earlier deadlines and general changes to my paper virtues, core instructions, costs may apply. Explore the full Revision Policy. ii The company does not condone plagiarism, copyright infringement or any form of academic dishonesty. Parents Best Essay! All provided sample services must only be used for reference purposes while being cited properly. Please read the Fair Use Policy.
Ultius is the trusted provider of content solutions for consumers around the world. Connect with great American writers and get 24/7 support. Ultius is accredited with the get someone my paper, Better Business Bureau and has an A+ rating. © 2017 Ultius, Inc. Before we chat, please tell us a bit about yourself.