Help with my map

OK Im done with all the triggers and such, now im n beta testing. And everytime i beta test with my map it lags horribly. Can someone please tell me what I can do to decrease lag like post some suggestions and such to make lag lowers. because i know it isnt my computer or the testers because we are working on LAN (Dont trust the internet with my map)and it dosent ever do this, and I also tried it in single player and it still lags like a b!tch so can someone please help me out so I can release my map?

Im confused on the type of lag your experiencing. If its just delay of something, then it's quite possibly a network problem. But if the FPS (Frames Per Second) are really low, it's possibly the magnitude of the map. If you could tell me the specifics of your system, including video card, that would help. Also, disable all your triggers and try again. If the lag stops, you most likely have a looping action or too many special effect attachments at the same time.