[jboss-jira] [JBoss JIRA] Created: (JBRULES-2764) Performance degradation from 4.0.7 to 5.0.1 to 5.1.0

[David Ward (JIRA)]

Performance degradation from 4.0.7 to 5.0.1 to 5.1.0
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                 Key: JBRULES-2764
                 URL: https://jira.jboss.org/browse/JBRULES-2764
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: drools-core, drools-core  (expert)
    Affects Versions: 5.1.1.FINAL, 5.0.1.FINAL
            Reporter: David Ward
            Assignee: Mark Proctor


I have noticed a performance degradation from 4.0.7 to 5.0.1, and 5.0.1 to 5.1.0.  Both in creating new StatelessSessions, and executing them.

I am attaching a portable test case which shows the degradation.  Please refer to the test.zip!/README.txt file for full instructions and explanation.

For the purpose of this jira description (and to show the degradation from a high-level), here is sample output.  Note that the run*.sh scripts only create new StatelessSessions, but do not execute them.  The exec*.sh scripts also execute the StatelessSessions.

run407.sh 
RuleTest: count=10000, total=33ms, average=0.0033ms
KnowledgeTest: API not available

run501.sh 
RuleTest: count=10000, total=1147ms, average=0.1147ms
KnowledgeTest: count=10000, total=784ms, average=0.0784ms

run511.sh 
RuleTest: count=10000, total=2381ms, average=0.2381ms
KnowledgeTest: count=10000, total=2007ms, average=0.2007ms

exec407.sh 
RuleTest: count=10000, total=875ms, average=0.0875ms
KnowledgeTest: API not available

exec501.sh 
RuleTest: count=10000, total=2641ms, average=0.2641ms
KnowledgeTest: count=10000, total=2223ms, average=0.2223ms

exec511.sh 
RuleTest: count=10000, total=4188ms, average=0.4188ms
KnowledgeTest: count=10000, total=3664ms, average=0.3664ms

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