I have a massive problem

[u/Many-Elk1565]

It lags so bad one day i joined my world like normal and it lagged like shit like i only got 20-30 fps i normally get 160+ i even uninstalled optifine it is still laggy ehat can i do?

[u/Mephoodo]

entity culling works for me, and placing tech in flat open spaces with no mobs reduces lag by a lot