There was an error retrieving your Wish Lists. James (Jim) Gough is a Java developer and author. Top subscription boxes – right to your door, Learn how Java principles and technology make the best use of modern hardware and operating systems, Explore several performance tests and common anti-patterns that can vex your team, Understand the pitfalls of measuring Java performance numbers and the drawbacks of microbenchmarking, Dive into JVM garbage collection logging, monitoring, tuning, and tools, Explore JIT compilation and Java language performance techniques, Learn performance aspects of the Java Collections API and get an overview of Java concurrency, © 1996-2020, Amazon.com, Inc. or its affiliates. There are no simple recipes, tips and tricks, or algorithms to learn. Benjamin J Evans, James Gough, "Optimizing Java: Practical Techniques for Improved Performance Tuning" English | ISBN: 1491933321 | 2016 | PDF/EPUB/MOBI | 54 pages | 2 MB/4 MB/8 MB. And it requires diligence. He is a Java Champion; JavaOne Rockstar; co-author of “The Well-Grounded Java Developer” and a regular public speaker on the Java platform, performance, concurrency, and related topics. Imagine a scenario where you had a list of a million objects (either strings directly or objects representing some item with a date field on them backed by a string), and you had to perform an adjustment to the date on them. Community has remained central to Jim’s contributions, which include working on the design and testing of JSR-310 and serving on the Java Community Process Executive Committee for several years. SEO Tutorial PDF for Beginners SEO Tutorial 2: On-Page Optimization On page Optimization is the base of Search Engine Optimization. This may seem like a contrived example, but I’m sure you’ve seen cases where dates were being stored as strings in the database or returned as strings in API responses. Benjamin J. Evans, James Gough, and Chris Newland. Optimizing Java - Practical Techniques for Improving JVM Application Performance Benjamin J. Evans, James Gough, and Chris Newland. *FREE* shipping on qualifying offers. Parallel streams are another matter, despite their ease of use they are something that should only be used in rare scenarios and only after you’ve profiled both the parallel and serial operations to confirm the parallel one is in fact faster. They must also have a comparison point to be able to know if their improvements have improved anything, and if so, by how much. There are no simple recipes, tips and tricks, or algorithms to learn. Performance tuning is a process of defining and determining desired outcomes. Enter your mobile number or email address below and we'll send you a link to download the free Kindle App. The amount of time spent on each is a variable. If you’re not using a string builder inside of a loop, you’re throwing away a lot of potential performance. Your information is safe with us. TA342.R36 2009 620.001′5196—dc22 2009018559 Printed in the United States of … Sometimes the fundamental approach might be flawed, meaning even if you expend a great effort and manage to make it run 25% faster by performing all the optimizations possible, changing the approach (using a better algorithm) could result in order of magnitude or more performance increase. The second requires loading a constant string and then the formatting step will be skipped. If you're a seller, Fulfillment by Amazon can help you grow your business. These tips are only really applicable in specific high-performance scenarios, so there’s no need to go writing all your code in this approach as the difference in speed will be minor. If the date was already represented as a Unix timestamp, (or a Date object, because it’s effectively just a wrapper around a Unix timestamp) all you have to do is perform a simple addition or subtraction operation. One instance of where you _should _use string formatting instead of concatenation in high-performance environments, however, is debug logging. Optimization Vocabulary A football coach is planning practices for his running backs. If you do need to append to a string from multiple threads (say in a logging implementation), that’s one of the few situations where StringBuffer should be used instead of a StringBuilder.