No HotSpot refers to the portion of the JVM that compiles java bytecode to native code and applies various optimisations over time depending on the frequency with which code is executed. -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Hehl, Thomas Sent: 13 August 2008 13:47 To: 'Rules Users List' Subject: RE: [rules-users] Java code Vs Drools What does this mean? Because of garbage collection? -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Corneil du Plessis Sent: Wednesday, August 13, 2008 5:42 AM To: 'Rules Users List' Subject: RE: [rules-users] Java code Vs Drools Make sure when you do performance testing that you run through enough iterations so that the engine code benefits from HotSpot. -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Harsh Jetly Sent: 13 August 2008 11:03 To: rules-users(a)lists.jboss.org Subject: [rules-users] Java code Vs Drools I have been evaluating the rule engine (ie Drools 4.0.4). I have created an application which has about 20 rules . I insert about 500 arraylists into the working memory and each arraylist contains about 4 objects. The rule engine picks the object that is the best match from the arraylist and stores it . This processing takes about 0.953 secs . Now this very same scenario I have implemented in using java code (if ..else)...it takes about 0.016secs . I was expecting the rule engine to give a better performance. Considering the use of alpha node caching and other factors of the rete algorithm. This is how one of the rules look in the rule file : rule "P1 110" salience 1 activation-group "1" when PriorityType( pricetype == "10,20,30,40,110" ) list :ArrayList( ) t:TlbObjectAttributeData( lngAttrTypeId == 110 ) from list then result.add(t); end Am I doing something wrong or this application is not harnessing the pluses of the rule engine . If so can you please tell me which kind of application should I build to highlight the performance of a rule engine . Appreciate it Regards Harsh Jetly SOA Center of Excellence ______________________________________________________________________ _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users