本书深入探讨了Java应用性能，涵盖了JVM、Java语言和API。作者讲解了如何通过性能测试获取最佳效果，使用JDK工具收集性能数据，理解JIT编译器，优化垃圾收集器，管理堆内存和本地内存，提升线程与同步性能，以及解决Java EE和Java SE API的性能问题。书中详细讨论了各个关键主题，包括垃圾收集算法、内存最佳实践和数据库性能等。
Java Performance: The Definitive Guide Description：
Publication Date: May 4, 2014 | ISBN-10: 1449358454 | ISBN-13: 978-1449358457 | Edition: 1
Coding and testing are often considered separate areas of expertise. In this comprehensive guide, author and Java expert Scott Oaks takes the approach that anyone who works with Java should be equally adept at understanding how code behaves in the JVM, as well as the tunings likely to help its performance.
You’ll gain in-depth knowledge of Java application performance, using the Java Virtual Machine (JVM) and the Java platform, including the language and API. Developers and performance engineers alike will learn a variety of features, tools, and processes for improving the way Java 7 and 8 applications perform.
Apply four principles for obtaining the best results from performance testing
*Use JDK tools to collect data on how a Java application is performing
*Understand the advantages and disadvantages of using a JIT compiler
*Tune JVM garbage collectors to affect programs as little as possible
*Use techniques to manage heap memory and JVM native memory
*Maximize Java threading and synchronization performance features
*Tackle performance issues in Java EE and Java SE APIs
*Improve Java-driven database application performance
Java Performance: The Definitive Guide Table of Contents：
Chapter 1. Introduction
Chapter 2. An Approach to Performance Testing
Chapter 3. A Java Performance Toolbox
Chapter 4. Working with the JIT Compiler
Chapter 5. An Introduction to Garbage Collection
Chapter 6. Garbage Collection Algorithms
Chapter 7. Heap Memory Best Practices
Chapter 8. Native Memory Best Practices
Chapter 9. Threading and Synchronization Performance
Chapter 10. Java Enterprise Edition Performance
Chapter 11. Database Performance Best Practices
Chapter 12. Java SE API Tips
Appendix A. Summary of Tuning Flags
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