[jboss-jira] [JBoss JIRA] (DROOLS-888) Drools 6.2 performance issue when using @ sign in drl file

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-888?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco resolved DROOLS-888.
--------------------------------
    Fix Version/s: 6.3.0.CR2
       Resolution: Done


Fixed by https://github.com/droolsjbpm/drools/commit/cf8b90ab7

This commit makes the TypeResolver to cache also non-existing classes, thus avoid hitting the ClassLoader multiple times when looking for a class that is not there. 

> Drools 6.2 performance issue when using @ sign in drl file
> ----------------------------------------------------------
>
>                 Key: DROOLS-888
>                 URL: https://issues.jboss.org/browse/DROOLS-888
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 6.2.0.Final
>         Environment: jdk1.7.0_25
>            Reporter: Thomas Leung
>            Assignee: Mario Fusco
>             Fix For: 6.3.0.CR2
>
>
> Our project has a need to use annotation (@) in drl files as a meta-data for each rule. E.g. 
> rule "TEST RULE"
> @ID('ABC001')
> @FixedBy('Thomas')
> when
>    ...
> While migrating from 6.1.0.Final to 6.2.0.Final, we noticed that there is a significant increase in the building time of the KieBase. The time needed for 6.2.0 is more than twice the 6.1.0. As we have quite a lot of KieBase configured, it is not acceptable.
> After some experiements, we found that it is due to the annotations in drl files. Are there any difference in the internal implementation of KieBuilder between that 2 minor versions which will cause that performance issue? If yes, may I know if it possible to fix it?
> Thanks & Regards,
> Thomas Leung



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