Performance

Using async path-tracing to hide Block-/Entities that are not visible

Memory usage optimizations

BetterF3 is a mod that replaces Minecraft's original debug HUD with a highly customizable, more human-readable HUD.

Rewrites the light engine to fix lighting performance and lighting errors

Adds culling to leaf blocks, providing a huge performance boost over vanilla.

This mod allows you to toggle which information shows up on the F3 debug menu.