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

Sun Mar 16 14:21:51 EDT 2008

Objenesis too heavily used
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                 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

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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