Why do I need this?
This is a plugin that allows you to use JMH in the same way as JUnit. Here are the features that are already implemented:
- Running a separate
- Running all the benchmarks in a class
How do I use this?
First of all, you must have
jmh-generator-annprocess on the classpath of your module.
After that install the plugin. You can do this directly from IDEA — search for
JMH in plugin repositories.
Then you can use the plugin the same way you use JUnit. To generate a new benchmark method run
Generate... action. In Mac OS it is
Ctrl + N
Or just right click in your editor pane and select
Generate micro benchmark.
To run a separate benchmark method move the cursor to the method declaration and invoke
In Mac OS it is
Ctrl + Shift + F10.
Do the same actions to run all the benchmarks in a class, just move your cursor to the class declaration.
Run actions will create a new configuration with default parameters JMH provides. If you want to change these parameters just
edit this configuration. By now it's not possible to set default parameters for all configurations.
Please, note that when running a benchmark Annotation processing is automatically enabled in your IDE.
Doesn't it affect the quality of my benchmarks?
A brief research shows that benchmark results are affected, but not that much. The whole research is described in Research results. Long story short, the maximum means difference observed was 2.2%.