Hi all, I'm new to this list, but I have a question about the performance costs of removing a rule. I know that if I have, for example, 100 rules that there is an API to remove just one of them. However, what I don't know is how efficient it is to do this. Does removing just one rule clear out all of the existing inferences and then recompute the working memory from scratch (perhaps by recompiling the remaining 99 rules)? Or, alternatively, does Drools have some efficient way of just removing that one rule along with only the specific items that were inferred using it? Does anyone know? Thanks, David -- View this message in context: http://www.nabble.com/Performance-on-Rule-Removal-tp21240363p21240363.html Sent from the drools - user mailing list archive at Nabble.com.