[rules-users] How to avoid stateless session rule fire on every fact ?

Hi all, In my project I have 20,000 rules to reason with 20,000 facts. The rules are embedded in facts. Therefore for each rule , there is one fact object which that rule belongs to. I'm using following condition to find this matching object. rule "Book Rule 1 - 187970786749253 " no-loop true when $book : Book( bookId == 187970786749253 , $eligible : eligible == false ) UserProfile( userType == UserType.STUDENT , status == 1 ) //... other conditions then //Do something here... end So above rule is belongs to Book object which has id = 187970786749253 ( This is a unique id ). I'm using stateless sequential rule engine. Following is the my understanding how rules are executed over facts. For first rule it needs to check all the 20,000 objects in worst case to find matching Book. For second rule the worst case should be 19,999 object search since one object is found and processed. But I used AgendaEventListener to find the time for each rule. It has nearly constant time for each rule , which means for each rule, engine search all the 20,000 object. I need to avoid this still keeping stateless session. Any ideas how to do this ? Thanks ! -- View this message in context: http://drools.46999.n3.nabble.com/How-to-avoid-stateless-session-rule-fir... Sent from the Drools: User forum mailing list archive at Nabble.com.