[jboss-jira] [JBoss JIRA] (DROOLS-775) Performance degradation with objects with many fields and method in working memory.

[Federico Bertola (JIRA)]

Federico Bertola created DROOLS-775:
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             Summary: Performance degradation with objects with many fields and method in working memory.
                 Key: DROOLS-775
                 URL: https://issues.jboss.org/browse/DROOLS-775
             Project: Drools
          Issue Type: Bug
          Components: core engine
    Affects Versions: 6.2.0.Final, 6.1.0.Final, 6.0.0.Final, 6.3.0.Final
         Environment: Ubuntu 14.10 x64, jdk 8
            Reporter: Federico Bertola
            Assignee: Mario Fusco


I experience some major performance degradation while migrating from drools 5.0.1 to 6.x. I'm inserting objects with many properties into the working memory and firing some very basic rules which will match against a very small subset of those properties. I expected that the older version of Drools, which uses pure reflection, to be somewhat slower that the newer, which uses some clever ASM optimization., but this is not the case. I've also noticed that if the required properties are scattered across multiple level of hierarchy, the performance issue will aggravate.



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