A must-have performance mod that especially helps with animations and high-res entity textures

Does what it says: it culls entities. Entities and block entities that you cannot see (be they behind a wall or in a direction you're not facing) are not rendered. In crowded areas this is especially helpful. It is also easy to toggle using a keybind that's unbound by default called debug toggle culling. I usually set it to comma ,.

This plays nice in cases where another culling mod might overlap, such as Brute Force Rendered Culling (and it fork Revived).