In theory there could be a lot of things pathfinding, so true, it could add up. Try it out and see, and maybe focus on making the system flexible so if there's plenty of memory available (or to cheat: if the user enables it) then use fancy fast pathing, if not then fall back gracefully to some weaker system.
And probably on the leaves - tho the system would still have to pay attention so moving through leaves would slow you down some. That's probably a little ways out atm.
And probably on the leaves - tho the system would still have to pay attention so moving through leaves would slow you down some. That's probably a little ways out atm.