When playing my creative world in the village I had modified the game runs smoothly until I look at one particular building in a specific chunk, at that point I go from 60 fps down to zero and if I manage to turn my point of view all frame rate is good. Started happening with the most recent snapshots. Wondering if its a specific block that is causing it, use of blocks are lava, the underwater blocks from previous versions and stone bricks with a few redstone lamps and colored glass. Tried going back to previous versions and still same thing. Not sure if its perhaps an item causing it. Church was unfinished in this screen but after I finished side walls is when it began happening.