[rules-users] ReteOO, KnowledgeBase and KnowledgeSession relation

Hi, I understand that the ReteOO network is built when a KnowledgeBase is created. Can you please tell me: - if any modifications are made to this network after a session (say StatefulKnowledgeSession) has been created from this KnowledgeBase? - any optimizations made at the session level? (such that time taken to fire rules decreases when certain set of facts are re-inserted and rules re-executed) I could not find any explanation in Drools Expert documentation regarding the above two points. Any pointers explaining the relation between ReteOO, KnowledgeBase and KnowledgeSession will be helpful. Thanks.