[jboss-jira] [JBoss JIRA] Commented: (JBRULES-2764) Performance degradation from 4.0.7 to 5.0.1 to 5.1.1

Performance degradation from 4.0.7 to 5.0.1 to 5.1.1 ---------------------------------------------------- Key: JBRULES-2764 URL: https://issues.jboss.org/browse/JBRULES-2764 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Components: drools-core, drools-core (expert) Affects Versions: 5.0.1.FINAL, 5.1.1.FINAL Environment: Sun JDK 1.6.0_20 on Fedora 11 (Linux 2.6.30.10-105.2.23.fc11.i686.PAE) Reporter: David Ward Assignee: Mark Proctor Fix For: 5.2.0.M1 Attachments: JBRULES-2764.patch I have noticed a performance degradation from 4.0.7 to 5.0.1, and 5.0.1 to 5.1.1. 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