neoforge optimization mods - 1.21.1 (additional)

Optimization mod that focuses on things other than rendering

Clumps XP orbs together to reduce lag

An efficient and non-locational redstone dust implementation

Completely removes recipe book from the game, optimizing player data.

Buffered raw input and threaded event polling

Attempts to optimize the generation of Jigsaw Structures and NBT pieces

Async particle tick, GPU accelerated particle rendering.

Provides powerful network optimization capabilities for all mainstream systems.

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

Distribute HUD updates over multiple frames to improve performance

Advancements optimization mod, updated fork of Icterine with added features

Improve your Create FPS when shaderpack is on, up to 50%

A lightweight entity-tick-scheduler for doubling your TPS.

Instanced rendering for entities and block entities using Flywheel

EXPERIMENTAL: Highly unstable alternative world format for Minecraft. Here be dragons.