Maybe i was a bit jumpy on the optimization gun, just trying to point out to a new user that behaviors are faster than using events in large-number-of-instance scenarios.
Even that's a tricky statement - if the collision checks are bottlenecking your game (by the way, the collision checker is very highly optimised, so you must be absolutely HAMMERING the collision checker) then the overhead of the event engine is small compared to the collision checks. The overhead of the platform behavior is smaller - but the actual collision check is the heavy lifting here and both would do that - so again, would switching between one or the other really change the efficiency of collision checks?