Hi Edson, thank you very much for your answer. > If it is LHS of the rules that is taking too long to execute, then you > may try enabling the engine multi-thread evaluation option. Well, it is the LHS which we would like to speed up because we anticipate a few hundred rules in there and only a few in the RHS. We are just building a proof of concept so we don't know if we will need it later in production. We want to make sure we will have this option, just in case. So we would like to enable the engines multi-threading evaluation. Do you have a link with some documentation? I didn't find anything to this topic on jboss.com and google. Thank you! Cheery, Tobias _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users