Overtime the game will use more and more memory causing chunks to not load, the game to freeze/crash and even make other programms crash because java will use up all your memory. this is called "memory leak"

Steps to Reproduce:

1. open/close a singleplayer world or use a netherportal a couple times
2. look at your overall memory usage, java will use more and more everytime

Observed Results:

chunks dont load,mobs dont move, projectiles dont fly,chat doesnt work, game and even other programms crash

Expected Results:

chunks load, mobs move, projectiles fly,chat works, game and other programms dont crash