Lithium

Lithium is a general-purpose Java Edition optimization mod for players and server owners who want lower game-logic overhead without changing how the world plays. It focuses on internal systems such as physics, mob AI, block ticking, and the integrated server used in single-player worlds.

Loader and side support

• Loaders: Fabric, NeoForge, and Quilt.
• Side: optional on both client and server, so a server can run it without requiring every player to install it.
• Dependencies: no extra mod dependency is listed for normal installation.
• Install path: place the matching jar in the mods folder for the loader and Minecraft version you use, following our guide to installing Minecraft mods if this is a new setup.

On servers, Lithium is aimed at reducing tick-time pressure from common world simulation work. In single-player, the same server-side logic still runs behind the scenes, so the mod can help the game spend less CPU time on world updates.

Lithium is not a visual mod and does not add blocks, mobs, items, menus, or shader features. It is most relevant when a pack or server already has its content set and needs a lighter simulation layer underneath.

Lithium is usually run alongside other single-purpose optimization mods rather than as a full replacement for them. C2ME's own documentation names Lithium as a recommended companion, since Lithium covers general game logic while C2ME focuses specifically on chunk generation, loading, and saving. Krypton covers a third area, network packet overhead, without touching either one.