Consider for Photon

A mod that fixes random memory leaks for both the client and server

Particle optimizations: Culling, rendering optimizations, configurable particle-type-specific spawn reduction, and potion particle disabling. Compatible with Sodium, improves performance over Sodium alone.

Improve and tweak Minecraft thread scheduling. Fork of Smooth Boot for ≥1.20

Async particle tick, GPU accelerated particle rendering.

Vanilla Worldgen optimization mod

Distribute HUD updates over multiple frames to improve performance

Applies various, compatible optimizations to improve perfomance and stability. Ready for client, server or both uses!

Removes configured rendering layers to increase performance when rendering items, armor, weapons, etc.

A port of a mixin mod Nothirium to 1.8.9.