Originally posted by Dwarflord:

There are also "Bad" instances and "Not bad" instances. Light sources, crops, and players/monsters/tames are some of the worst offenders with regard to FPS.

As I said I had no issues prior to visiting mistlands, and while there I was getting about 30 fps, It was only when returning to the middle of the map and my main base, the low FPS stuttering happens. Which never happened before, even with my crops and lights and no tames