[DustyPorViva]

Lag will most likely come from having to load the NPC's when the player enters a level. There may also be some lag associated with gani's/showcharacters. Classic already lags a hefty amount when too many other players are visible... like I said though, I'm not sure if that's because of how it handles other players or because of all the showcharacters(disabling nicks helps, but it's still noticeable).

Whenever you enter a level, it has to load all NPCs be it local or dynamic(putnpc2 and such). I can notice it when I enter a level with a lot of bushes, because it will freeze upwards to a second or two. It's not just as simple as how much script is running.

Just remember, every object(bush/vase/sign) is an NPC, bombs are NPCs, then calculate loading players as well... and who knows what else. It would be fairly easy to create something like this to test the limits, however.