in my and my friends minecraft worlds, where we usaly have good and fast gamerate and in the void of the end there's a triange, the world loads slowly every 5 min and blocks i place take 2 min to load! it's using to much memory please try to fix it

in my and my friends minecraft worlds, where we usaly have good and fast gamerate/quality and in the void of the end there is a perfect triange the world loads slowly every 5 minutes and the blocks i place take 2 minutes to load! minecraft is using to much memory on somethings such as the void triangle which is not made of blocks, so please try and fix this and the rest of the slow loading isues, they probaly are using to much memory