Hi All, I have written a code to check the properties of a bean using drools based rules. I have created the different rules file where different properties of the bean will be checked. The code i have written is a as below: public static void check(Object details,String rule){ long methodStartTime=System.currentTimeMillis(); Resource resource = new ClassPathResource(RULE_CLASSPATH+rule); KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); long startTime=System.currentTimeMillis(); kbuilder.add(resource, ResourceType.DRL ); long endTime=System.currentTimeMillis(); System.out.println("Time taken in add resource in milli seconds is::"+(endTime-startTime)); KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() ); KnowledgeBuilderErrors errors = kbuilder.getErrors(); if (errors.size() > 0) { for (KnowledgeBuilderError error: errors) { System.err.println(error); } } StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession(); ksession.execute(details); long methodEndTime=System.currentTimeMillis(); System.out.println("Time taken in Method check in milli seconds is::"+(methodEndTime-methodStartTime)); } Here in the check method we have three parameters details this is the bean whose properties need to be checked in rules file, rule this is the name of rules file which contains all the rules. Here the issue is that it takes around 4 seconds for the first time and 1 second for all consecutive requests, and 4 second looks too much time for validating the rules file that has only 10 rules. Please let me know we have some better way of doing it in drools -- View this message in context: http://drools.46999.n3.nabble.com/Performance-issue-tp4017688.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users