[jboss-jira] [JBoss JIRA] Commented: (JBRULES-1507) Objenesis too heavily used

[Edson Tirelli (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBRULES-1507?page=comments#action_12403216 ] 
            
Edson Tirelli commented on JBRULES-1507:
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Jan,

Thanks for the patch. I patched 4.0.x branch and committed. Can you please take a look and let us know?
Also, if you can provide us with a self contained version of the perf test you used to find this bottleneck, we would really appreciate.

[]s
Edson

> Objenesis too heavily used
> --------------------------
>
>                 Key: JBRULES-1507
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-1507
>             Project: JBoss Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 4.0.4
>            Reporter: Wojciech Kudla
>         Assigned To: Mark Proctor
>             Fix For: 4.0.5
>
>         Attachments: AbstractRuleBasePatch.patch, RuleBaseConfigurationPatch.patch
>
>   Original Estimate: 15 minutes
>  Remaining Estimate: 15 minutes
>
> We are using drools in heavily concurrent environment. We build new rulebase for every request that hits our application.
> There are no new bottlenecks or thread locks after using Jan's (I work in the same team as Jan Boboli does :)) hack to the rulebase classloader, but it seems drools spends a lot of time in objenesis package classes trying to resolve proper instantiators for the very same classes with each request.
> This happens because method createObjenesis in AbstractRuleBase returns new instance of ObjenesisStd. There are scenarios in which this only causes performance degradadion (this is our case), so I decided to change the method to return static ObjenesisStd instead of new instance for each rulebase. After that drools rocketed up to 5 times faster than before :)
> I think it would be a great idea if you added a new option for RuleBaseConfiguration to give the user a choice of how objenesis is instantiated.

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