[rules-users] More knowledge bases in application - Performance Hit ?

Hello All, Does KnowledgeBase has lot of overhead in it..? Would there be a performance hit on an application if it has 200 different KnowledgeBases, because of the size of the KnowledgeBase, overhead storage of the KnowledgeBase object or for any other reason..? Ofcourse, Application would only build KnowledgeBases once at the startup of the application, stores them, and uses them for rest of the life. Thank you, kumar.