[jboss-jira] [JBoss JIRA] Commented: (JBRULES-2764) Performance degradation from 4.0.7 to 5.0.1 to 5.1.1

[David Ward (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-2764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12573898#comment-12573898 ] 

David Ward commented on JBRULES-2764:
-------------------------------------

Thanks, Tihomir. Using the new .getDefaultInstance() from the configurations appears to have made a big positive impact on session creation time!

It also helped improve the execution tests from 5.1.1, although still significantly slower than execution in 5.0.1.  I'm not the one to say whether the improvement is "good enough", though. However I can understand the short-term limitation given the new features.  Thanks again.

> Performance degradation from 4.0.7 to 5.0.1 to 5.1.1
> ----------------------------------------------------
>
>                 Key: JBRULES-2764
>                 URL: https://issues.jboss.org/browse/JBRULES-2764
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core, drools-core  (expert)
>    Affects Versions: 5.0.1.FINAL, 5.1.1.FINAL
>         Environment: Sun JDK 1.6.0_20 on Fedora 11 (Linux 2.6.30.10-105.2.23.fc11.i686.PAE)
>            Reporter: David Ward
>            Assignee: Mark Proctor
>             Fix For: 5.2.0.M1
>
>         Attachments: JBRULES-2764.patch
>
>
> I have noticed a performance degradation from 4.0.7 to 5.0.1, and 5.0.1 to 5.1.1.  Both in creating new StatelessSessions, and executing them.
> I am attaching a portable test case which shows the degradation.  Please refer to the test.zip!/README.txt file for full instructions and explanation.
> For the purpose of this jira description (and to show the degradation from a high-level), here is sample output.  Note that the run*.sh scripts only create new StatelessSessions, but do not execute them.  The exec*.sh scripts also execute the StatelessSessions.
> run407.sh 
> RuleTest: count=10000, total=33ms, average=0.0033ms
> KnowledgeTest: API not available
> run501.sh 
> RuleTest: count=10000, total=1147ms, average=0.1147ms
> KnowledgeTest: count=10000, total=784ms, average=0.0784ms
> run511.sh 
> RuleTest: count=10000, total=2381ms, average=0.2381ms
> KnowledgeTest: count=10000, total=2007ms, average=0.2007ms
> exec407.sh 
> RuleTest: count=10000, total=875ms, average=0.0875ms
> KnowledgeTest: API not available
> exec501.sh 
> RuleTest: count=10000, total=2641ms, average=0.2641ms
> KnowledgeTest: count=10000, total=2223ms, average=0.2223ms
> exec511.sh 
> RuleTest: count=10000, total=4188ms, average=0.4188ms
> KnowledgeTest: count=10000, total=3664ms, average=0.3664ms

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