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Lithium

Lithium

Mod

No-compromises game logic optimization mod. Well suited for clients and servers of all kinds. Now available for Fabric and NeoForge!

Client or server Optimization
79.59M downloads
20.2k followers
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Lithium 0.15.2 for Fabric

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Download Report

Changelog

Lithium 0.15.2 for Minecraft 1.21 and 1.21.1 backports an optimization and bug fixes.

Make sure to take a backup of your world before using the mod and please report any bugs and mod compatibility issues at the issue tracker. You can check the description of each optimization and how to disable it when encountering a problem.

Additions

  • Optimize non POI block searches (Thanks to jcw780)

Fixes

  • Fix incorrect hopper sleeping with double chests halves read by comparators

Files

lithium-fabric-0.15.2+mc1.21.1.jar(778.5 KiB) Primary Download

Metadata

Release channel

Release

Version number

mc1.21.1-0.15.2-fabric

Loaders

Fabric Quilt

Game versions

1.21–1.21.1

Downloads

836534

Publication date

February 5, 2026 at 9:34 PM

Publisher

2No2Name

2No2Name

Project Lead

Version ID

External resources

IssuesSourceDiscordPatreon

Project members

CaffeineMC

CaffeineMC

Organization

jellysquid3

Original Author

2No2Name

Project Lead

Technical information

License
LGPL-3.0-only
Client side
optional
Server side
optional
Project ID