Performo

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

A Fabric mod based on Starlight that improves the performance of light updates in Minecraft.

Speed up your world loading by removing unneeded chunks.

[NOTE: This mod is now only intended for use with pre-existing Faster Random worlds]

Async particle tick, GPU accelerated particle rendering.

A Level of Detail rendering mod

Provides DSA & fastest math formulas to game render system for best perfomance! Compatible with Sodium/Embeddium, Iris and shaders.

Vanilla Worldgen optimization mod

Optimizes a lot of tasks that Entity AI wastefully performs, minimal effect on gameplay.

A mod that fixes some annoyances and speeds up your game!

Improved achievement performance

Another optimizing mod, provides deduplication, improved memory control, shader/chunk/nbt optimizations and enchanced mob AI. Full compatible with Sodium/Forks, Lithium/Forks, Iris/Forks

Async is a Fabric mod designed to improve the performance of entities by processing them in parallel threads.

Little optimization bedrock layer

Faster texture animation

Optimization of the bottom and/or top layer(s) of the world

Hide extra entities in order to reduce lag, especially with mob farms. The mobs still exist in the world, they are just not visible.

Mainly optimize the game launching time for large pack

Item clustering (fallen blocks, experience orbs, ...) and garbage cleanup.

A client-side optimization mod to make block entities render faster

The vertical chunk section syncing mod.

An extremely radical and experimental optimization for Minecraft server performances.

Entity LOD Optimizer optimizes Minecraft server performance by dynamically adjusting entity AI based on distance from players