Collisions have a huge impact on performance, and usually processing of collisions are left up to the collision events rather than being ignored at the server. Currently you can only filter out a single name or ID key - you cannot exclude other types. Add: llCollisionTypeFilter(integer type, integer status) where type=AGENT,SCRIPTED,ACTIVE and status=TRUE/FALSE Also independent of llMinEventDelay() please add: llCollisionEventRate(float rate) would also help cut down high rate collisions.