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Created: 2021-04-01
Reading time: ~16 minutes
A lot of programmers believe that compilers are magic black boxes in which you put
your messy code in and get a nice optimized binary out. The hallway philosophers
will often start a debate on which language features or compiler flags to use
in order to capture the full power of the compiler’s magic.
If you have ever seen the GCC codebase, you would really believe it must be doing
some magical optimizations coming from another planet.
Nevertheless, if you analyze the compiler’s output you will found out that
the compilers are not really that great at optimizing your code. Not because
Java Microbenchmark Harness (JMH)
A quick hands-on lesson to learn about Java Microbenchmark Harness (JMH). The article helps you get started and configure JMH project. by
Introduction
jvm. It is not enough to surround the code in a loop with
System.out.println() and gather the time measurements. While benchmarking, a developer should consider warm-up cycles, JIT compilations, JVM optimizations, avoiding usual pitfalls, and even more.
Thankfully, OpenJDK has a great tool Java Microbenchmark Harness (JMH) that can help us generated benchmarking stats. In this article, we will discuss how JMH can help us avoid the pitfalls that we have discussed earlier.