Unfortunately these two profiles look mostly the same, and only show a single thread waiting on a lock.

It is interesting that you are only seeing the degradation on Windows. I need a bit more information.

• What version of Java on Windows?
• Do you have a smaller benchmark you can run?

The --sample flag will enable a JVM-level profiler that may give us more information. It outputs to the console when the JVM exits.

If you would like to chat about your issues you can join us on Gitter, IRC, or the mailing list: http://jruby.org/community

Hi

Sorry for delay but I hit ridiculous problem:

failed:.org.jruby.rack.RackInitializationException: org.jruby.exceptions.MainExitException: jruby: unknown option --sample

this worked fine:
--profile.html --profile.out pr.html

Any idea?

@SzymonKowalczyk Sorry for delay...I had a busted computer.

That error would happen if JRuby is being launched some way other than via the bin/jruby launcher. The --sample flag just gets translated to JVM flag -Xprof, so you can try that as well.

Thank you for your replay.

As our process take some time I have some updates below:

We run 9.1.16 and there is a progress for huge test environment:

9.1.16 -> 4:20:12
9.1.15 -> 5:03:03
1.7.25 -> 3:55:13

I triggered repeat test on 9.1.16 and just after it I will generate requested dumps on 1.7.15 and 9.1.16.

What is the maturity of 9.2 I can try run test using development version of Jruby.

Regards

I've tested JRuby 9.1.17 and perf is fine, also with 9.2, we can close this issue.

Thanks for support and response