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:
- open/close a singleplayer world or use a netherportal a couple times
- look at your overall memory usage, java will use more and more everytime
chunks dont load,mobs dont move, projectiles dont fly,chat doesnt work, game and even other programms crash
chunks load, mobs move, projectiles fly,chat works, game and other programms dont crash