Consider for Photon

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

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

Async particle tick/rendering

Greatly improve your fps with virtually no side-effects on graphics quality

An open-source terrain renderer using the Celeritas Core API

Improves world generation speed, reduces server lag, and fixes lag spikes on client by optimizing the Minecraft lighting engine. Based on Phosphor.