I want to use JMH, an OpenJDK microbenchmark tool, with gradle. However, Im getting the NPE on compilation. On the other hand, JMH works when using from maven.
I am not posting any build.gradle
as it is basic - apply java plugin and add dependency on JHM tool (org.openjdk.jmh:jmh-core:0.2
).
I have tried whats written here without success.
What else I have to do? I think something with setting the agent, but I still didnt figure it out.
Exception:
:compileJava
java.lang.NullPointerException
at org.openjdk.jmh.processor.internal.GenerateMicroBenchmarkProcessor.validMethodSignature(GenerateMicroBenchmarkProcessor.java:502)
Just finished my "masterpiece". No uber-jars, no plugins, code base separated from main & test, benchmarks compilation hooked to main, but does not run automatically in the mainstream lifecycle. Simple, explicit, and hackable, vanilla gradle.
I run it directly from IntelliJ, to run on a box you probably will need the uber-jar back :-)
Before doing it I have spent a fair amount of time trying to get that plugin work, but it's way too clunky for my taste.
Step-by-step breakdown below.
Define a new
sourceSet
calledjmh
with classpath hooked to that of the mainsourceSet
Define dependencies for it (at minimum JMH and its annotation processor).
Define a task
jmh
of typeJavaExec
Hook
jmhClasses
task to run afterclasses
to make sure benchmarks are compiled with the rest of the code