[jboss-jira] [JBoss JIRA] (JBRULES-3459) Performance regression when using 'matches' operator, comparing with 5.3.

[Petr Široký (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-3459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12691306#comment-12691306 ] 

Petr Široký commented on JBRULES-3459:
--------------------------------------

Thanks for clarification Mario. I reran the test with actual string values instead of null and the performance is approximately same for both versions, so I am closing the issue.
                
> Performance regression when using 'matches' operator, comparing with 5.3.
> -------------------------------------------------------------------------
>
>                 Key: JBRULES-3459
>                 URL: https://issues.jboss.org/browse/JBRULES-3459
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core  (expert)
>    Affects Versions: 5.4.0.CR1
>            Reporter: Petr Široký
>            Assignee: Mario Fusco
>              Labels: regression
>             Fix For: 5.4.0.Final
>
>         Attachments: expert-matches-perf-test.zip
>
>
> I am seeing performance regression when using rules with 'matches' and 'not matches' (comparing 5.4.0.CR1 and 5.3.0.Final). In my case the difference is up to 100 % (2000 ms vs 4000 ms). The DRL file contains 100 rules and in the test 500000 non-matching facts are inserted into knowledge session. See the attached standalone maven project.

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