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Lithium

Name: Lithium
Author: jellysquid3

Speeds up the game logic behind mobs, redstone, physics and chunks without changing how anything behaves. Great on servers and in single-player.

How to install Lithium

Install the Fabric loader for your Minecraft version (it also supports NeoForge, Quilt).
Download the file that matches your Minecraft version and loader from the official page above.
Put the .jar file in the mods folder of your Minecraft folder, or install it with the CurseForge app, Modrinth App or Prism Launcher.
Start Minecraft with the loader profile. Lithium should appear in the Mods list.

Step-by-step help: how to install Minecraft mods. Only download from the official pages linked above.

Performance

Mod by jellysquid3

Rebuilds how Minecraft draws the world. Most players see far higher, steadier frame rates, and it is the base of almost every performance setup.

Mod by malte0811

Cuts how much memory Minecraft needs, which matters most in big modpacks and on lower-end PCs.

Mod by tr7zw

Skips drawing mobs and block entities you can't actually see, such as chests behind walls. A big boost in busy bases.

Mod by embeddedt

An all-in-one bundle of performance fixes and faster loading, especially useful for large modpacks.

Details from Modrinth API (https://api.modrinth.com) plus project pages on CurseForge, checked 30 October 2026. xarmo is not affiliated with Lithium.