Rooms freeze every 3 seconds for second, ruins lag when enter with mobs in them

Thanks for the report. This interior lag happens when a certain world-gen condition is met. 

Soon an optimization will be posted in a beta branch (to ensure its correctness) that tries to address this specific issue.

@bizziboi when is optimisation? My world still has all room with 1 second delay every 3 seconds

A beta is planned to go live tomorrow (fingers crossed) which should hopefully improve that.