Ever since the last update overall optimization has been terrible. Chunks take forever to load, villagers fly out of their beds when they sleep, Eating a enchanted golden apple will bring you down to about 2 frames per second; for about a minute, mobs just freeze and with some hostile mobs they turn invisible , open things like the inventory or chest takes a very long time, sounds are delayed, dieing while you fly down a stair case with an elytra will make you lose all  Your armor and blocks take an obnoxiously long time to appear broken. It's lt's like minecraft doesn't know where any entities are. As if I was a few million blocks out but I'm not far out im as close to 0,0 as you can get.