[jboss-jira] [JBoss JIRA] (AS7-3371) Low Performance of 7.1.0.CR1b - comparing with previous release

[Remy Maucherat (JIRA)]

    [ https://issues.jboss.org/browse/AS7-3371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12662122#comment-12662122 ] 

Remy Maucherat commented on AS7-3371:
-------------------------------------

I reviewed the EL rebase, and I don't see anything added that would cause a deadlock.

The new code is more accurate for method matching, which obviously can be more costly (but is needed), and there's also added identifier validation (which can be disabled by setting the "org.apache.el.parser.SKIP_IDENTIFIER_CHECK" system property to "true"). But it seems impossible that these can cause a real performance drop (and even then both items are needed for better spec compliance).
                
> Low Performance of 7.1.0.CR1b - comparing with previous release
> ---------------------------------------------------------------
>
>                 Key: AS7-3371
>                 URL: https://issues.jboss.org/browse/AS7-3371
>             Project: Application Server 7
>          Issue Type: Enhancement
>    Affects Versions: 7.1.0.CR1b
>            Reporter: Tomas Remes
>            Assignee: Remy Maucherat
>            Priority: Critical
>              Labels: eap6_prd_req
>             Fix For: 7.1.0.Final
>
>         Attachments: log-7.1.0.Beta1.txt, log-7.1.0.CR1b.txt
>
>
> There is low (especially stress test) performance of AS 7.1.0.CR1b. Comparing to 7.1.0.Beta1 there is at least three times worse performance. You can see marked builds at https://hudson.qa.jboss.com/hudson/view/Weld/view/Weld-Performance-All/job/perf-weld-numberguess-stress-single-jboss7/. In artifacts there is the log.txt file, where you can check stress tests results. I have run it quite many times with same or mostly similar results.

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