Horrible Performance In Buffet Survival

I was playing survival on a plains buffet world with a normal noise map. All was going well until I realized that all of a sudden the game got really slow and laggy when I tried to build a house. The seed I used was "Tmm" and placed me right next to a village. I had built a small wheat and tree farm near the church I was using as a temporary home. I haven't traveled far or done much but at one point I could barely get out of the place I was sleeping in.