i maked a map and my cpu is a little laggy (if you now what i mean) and the peopel joining was kicked by ping of my lagg (so its not so easy to stay online)
i woder if theres any solution
maybe rcon work (if it works then how do i start it)
don't use too many entitites. especially entities which create a lot of particles consume a lot of video and cpu speed and can lead to low fps on slow systems.
if your map lags for you when you open it as server: have a look at the fps. if it is lower than about 45-50 the lag is caused by the design of your map (too many entities with graphics/particles). solution: remove some of them or let them spawn less particles if you have entities spawning particles.