I have choppiness in my map.

One part of my new map im making takes a second longer to turn toward the door due to choppiness. There is alot of sectors around. How do i fix this?

Reduce the ammount of sectors in view (i.e a put a pillar in the way).

Check you haven't got any mapping errors causing the game to render to more than it should.

Try saving then testing instead of just hitting test in Doom Builder. The node builder will do a different job. Also might be worth to try different node buidlers (hit F6)