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

Performance degradation with objects with many properties in working memory. ---------------------------------------------------------------------------- Key: DROOLS-775 URL: https://issues.jboss.org/browse/DROOLS-775 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 6.0.0.Final, 6.1.0.Final, 6.2.0.Final Environment: Ubuntu 14.10 x64, jdk 8 Reporter: Federico Bertola Assignee: Mario Fusco Labels: regression Attachments: drools-test.zip 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 than 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. For example, after 100k iterations: droosl 5.0.1 -- Meters ---------------------------------------------------------------------- org.acme.test.drools5.DroolsPerformance.analized count = 100000 mean rate = 549.27 events/second ... drools 6.2.0.Final -- Meters ---------------------------------------------------------------------- org.acme.test.drools6.DroolsPerformance.analized count = 100000 mean rate = 198.58 events/second ...