Performance

Speed up immediate mode rendering in Minecraft

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

Optimization mod that focuses on things other than rendering

Improves performance by tweaking mob despawn rules. Say bye to pesky unintentional persistent mobs.

Pre-generates chunks, quickly and efficiently

Performance improvements for vanilla AI, with the ability to turn off certain AI behaviors

Unofficial Fork of CaffeineMC's "Phosphor", made to work with FML