Book Image

Java EE 8 High Performance

By : Romain Manni-Bucau
Book Image

Java EE 8 High Performance

By: Romain Manni-Bucau

Overview of this book

The ease with which we write applications has been increasing, but with this comes the need to address their performance. A balancing act between easily implementing complex applications and keeping their performance optimal is a present-day need. In this book, we explore how to achieve this crucial balance while developing and deploying applications with Java EE 8. The book starts by analyzing various Java EE specifications to identify those potentially affecting performance adversely. Then, we move on to monitoring techniques that enable us to identify performance bottlenecks and optimize performance metrics. Next, we look at techniques that help us achieve high performance: memory optimization, concurrency, multi-threading, scaling, and caching. We also look at fault tolerance solutions and the importance of logging. Lastly, you will learn to benchmark your application and also implement solutions for continuous performance evaluation. By the end of the book, you will have gained insights into various techniques and solutions that will help create high-performance applications in the Java EE 8 environment.
Table of Contents (12 chapters)

Writing performance tests

Performance tests are present at all stages in a Java EE application, and so, there are several ways to write a performance test. In this section, we will go through a few main ones, starting with the simplest one (algorithm validation).

JMH – the OpenJDK tool

Java Microbenchmark Harness (JMH) is a small library developed by the OpenJDK team—yes, the same one doing the JVM—which enables you to easily develop microbenchmarks.

A microbenchmark designs a benchmark on a very small part of an application. Most of the time, you can see it as a unit benchmark, using the analogy with unit tests.

Yet, it is something important when setting up performance tests as it will allow you to quickly...