Are npc's bad to put in a map?

Whatsup!
Was going to put 3 zombie npc’s in my TTT map. Im using CSS hammer. Would that have an effect on download speed, fps, etc etc?

Thanks!

Use point_template and spawn them when you need to., but keep in mind if they don’t have the correct addon (if you’re using snpcs) then it won’t work.

Thanks for the fast reply!

It worked like a charm!