[rules-users] Performance Tuning

I am trying to improve performance on a Large DataSet, few Rules app and came accross these two properties, which by default is false: RuleBaseConfiguration.PROPERTY_INDEX_LEFT_BETA_MEMORY RuleBaseConfiguration.PROPERTY_HASH_ALPHA_NODES What do they mean actually? How and when should I use them? I am trying to chase a O(n^2) performance problem that I understand it is probably caused by the way I coded the rules, but it seems that I need to deepen my understanding to actually find the hotspots. Are there any techniques (that I probably dont know) that can help me find what rule(s) is causing the issue? As always thanks for previous answers - Yuri