[rules-users] Object size affect on session insertion performance

Does the size of objects inserted into the session as facts directly affect performance? I have ran some very simple tests, with a kb with 1 rule that accumulated/collected over all facts in working memory of a type. If I have a really simple/small class, say SimpleClass It looks like: ``` rule "collecting" when $res : List() from accumulate( $s : SimpleClass(), init( List l = new ArrayList(); ), action( l.add($s); ), result( l )) then System.out.println("Done"); end ``` If I have a more complex class that will result in deeply nested objects, say ComplexClass It looks like: ``` rule "collecting" when $res : List() from accumulate( $s : ComplexClass(), // this is the only difference from above init( List l = new ArrayList(); ), action( l.add($s); ), result( l )) then System.out.println("Done"); end Now my Java test is just a simple one that puts a timer before and after insert like: ``` // initialize kb and session as usual // make N number of objects to insert of type SimpleClass or ComplexClass; depending on test run // store them in local variable cs final long start = System.nanoTime(); for (final SimpleClass c : cs) { // This would be ComplexClass when comparing ksession.insert(c); } final double end = ((System.nanoTime() - start) / 1000000.0); final int firedRules = ksession.fireAllRules(); // not really needed here ``` What I notice from these tests, is that for something like N=5000 of SimpleClass inserted into the session runs quick, say something like 35 sec. However, for the same N=5000 of ComplexClass inserted into the session, the time jumps to something like 148 sec. I haven't done exhaustive performance testing around this, but I am seeing this in more complex scenarios as well. I know that heap space (maybe perm space) play a role in this, but I have monitored my JVM processes during execution and there is no lack of available heap space and my machine has a lot of resources available still in both SimpleClass and ComplexClass scenarios. I am trying to understand if the actual size of an object inserted into the session has an affect on its overall performance. This may be a trivial question and I'm just overlooking something, but I'd appreciate any advice and feedback on this subject. I have not successfully been able to find any resources on the internet where this has been explicitly asked to base any thought off of. I also have read up some on Rete (and variations e.g. Drools), but I don't see how the size of the objects inserted as facts applies to the insert performance. Thanks! -- View this message in context: http://drools.46999.n3.nabble.com/Object-size-affect-on-session-insertion... Sent from the Drools: User forum mailing list archive at Nabble.com.