[jboss-jira] [JBoss JIRA] (AS7-6583) Performance regression comparing to previous release

[Tomas Remes (JIRA)]

    [ https://issues.jboss.org/browse/AS7-6583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12755702#comment-12755702 ] 

Tomas Remes commented on AS7-6583:
----------------------------------

Well yes, It's quite weird. The example isn't using any logging. The tests as well as results are available at http://jenkins.mw.lab.eng.bos.redhat.com/hudson/view/Weld/view/Weld-Performance-All/job/perf-weld-numberguess-load-single-jboss7/. IMHO this is bringing the regression https://github.com/jbossas/jboss-as/commit/526c2ae7a4194dc6b787c32c5218cea003276900 (but it could be anything else). Results are following (2000 parallel sessions load):

{noformat}
7.1.3.Final:                                                                   throughput 1,901.4 samples/s, mean response: 48 ms
7.2.0.Final(prerelease):                                                       throughput 1,537.0 samples/s, mean response: 293 ms
7.2.0.Final(prerelease) with logging cb2a3c15cb4a50c41032d27ea560a4f92d6e2b7d: throughput 1,937.9 samples/s, mean response: 27 ms
7.2.0.Final(prerelease) with logging 526c2ae7a4194dc6b787c32c5218cea003276900: throughput 1,537.5 samples/s, mean response: 308 ms
{noformat}

Of course that I could be wrong, but now it seems to me that mentioned commit is the problem (it's not easy to profile such load).
                
> Performance regression comparing to previous release
> ----------------------------------------------------
>
>                 Key: AS7-6583
>                 URL: https://issues.jboss.org/browse/AS7-6583
>             Project: Application Server 7
>          Issue Type: Bug
>          Components: CDI / Weld, Logging
>    Affects Versions: 7.2.0.Alpha1
>         Environment: 7.2.0.Final (prerelease-1 tag) 
>            Reporter: Tomas Remes
>            Assignee: James Perkins
>            Priority: Critical
>              Labels: performance
>
> There is significant performance regression in 7.2.0 prerelease. I discovered it in my Weld performance load tests (testing simple Weld numberguess example application), but I am quite sure that's not Weld issue at all. I did some investigations and it seems that problem occurred in org/jboss/as/logging module.

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