As soon as you open a new world it takes a long time to load.

Once you get in there chunk levels takes a little more time to load, in some occasions it gets choppy when rotating the camera or moving also becomes laggy, begins to crash and closes the game

Nether terrain generation takes up to 10 seconds to complete after entering,
End terrain generations gets laggy/choppy if walk in it

Recipe Book screen lags out while using a controler, the pointer... Thingy skips a space, crafting cause duplication or partial lost of items while using the recipe book screen