I've tested the map by deleting 100 triggers. And the lag disappeared. It IS the triggers causing the laggage. (note* it's quite small) I wonder why it'd only affect my map, or maybe it's too small to notice on other maps.

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Look for a trigger's that's been preserved for which the conditions always apply... if a trigger is always performing certain actions it'll lag up ur game... (especially if ur using hyper triggers...)