Don't Know

Using async path-tracing to hide Block-/Entities that are not visible

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

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

A mod that aims to optimize the minecraft server.

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

A performance mod designed to optimize Minecraft's memory usage.

Smart leaf culling algorithm for Sodium on 1.21+

Memory optimization mod that prevents duplication of Enum values.

FastBoot is engineered to drastically reduce game loading time

Increases FPS and facilitates rendering by using OpenGL 4+ Compatible with Vulkan, Sodium/Embeddium and shaders.

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

A Forge port of the Sodium performance mod.

Ticking Entity Optimizations

Reduce stuttering when generating new chunks

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

Little optimization bedrock layer

Removes (annoying) rollbacks

Krypton unofficial NeoForge port. A mod to optimize the Minecraft networking stack.

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

Mod to improve quest performance for servers

Caches the FTB Quests menu on startup to prevent freezing in game!

A mod that reworks mob AIs. Including some bosses.

Culling something can't seeing

A lightweight fabric mod that changes the sin and cos for better math.

MultiLoader particle culling mod to improve performance

Optimisation mod for the dedicated/integrated server.

Optimizes all your server dimensions distributing the load on multiple threads

Blocking network connections to prevent update checks and reduce Minecraft startup time

Removes collision from a few passive mobs to increase FPS and TPS!

Greatly increases performance by stacking mobs together reducing the physical number of entities in the world with a config for further customization. Includes a mob cap module.

Set the compression level of each packet sent!