Hi, I have a rule that looks for 2 consecutive events for the same entity. To stress test it, I inserted 10K consecutive events. I'm calling fireAllRules() after each event is inserted. I'm printing out timestamps after every 100 events. I'm noticing that insertions/evaluations are increasingly slower. Here's the rule : rule "Consecutive events" when $latest : Event($id : id) // newest event not Event(id == $id, this after $latest) // no events after the newest $previous : Event(id == $id, this before $latest) // event before the newest not Event(id == $id, this before $latest, this after $previous) // no events between $latest and $previous then //System.out.println($latest.toString()); end It is my understanding that the above rule should only match the latest 2 events and automatic memory management should remove older events. If so, why are insertions progressively slower? Interestingly, ksession.getObjects() returns all the events inserted and not just the latest 2 events. Is my understanding of the rule incorrect? Does the rule somehow force all events to stay in memory? Thanks, Sumant -- View this message in context: http://drools.46999.n3.nabble.com/Evaluations-are-increasingly-slower-tp4... Sent from the Drools: User forum mailing list archive at Nabble.com.