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Lithium (Fabric/NeoForge)

An optimization mod for Minecraft which improves server performance significantly.

File Details
DownloadInstall

Lithium mc1.21.8-0.18.1 for Fabric

By2No2Name
  • R
  • Sep 30, 2025
  • 820.18 KB
  • 431.8K
  • 1.21.8
  • Fabric + 1

File Name

lithium-fabric-0.18.1+mc1.21.8.jar

Supported Versions

  • 1.21.8

Curse Maven Snippet

Fabric

modImplementation "curse.maven:lithium-360438:7047230"

Quilt

modImplementation "curse.maven:lithium-360438:7047230"
Curse Maven does not yet support mods that have disabled 3rd party sharing

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Lithium 0.18.1 for Minecraft 1.21.8 adds several new optimizations.

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 piglin/hoglin repellent and turtle egg searches (Thanks to jcw780)
  • Optimize random ticking
  • Optimize precipitation

Changes

  • Re-enable previously broken inline world height optimization

Fixes

  • Fix missing initialization of block counting in empty sections
  • Fix compatibility issue that convert client side mobs to nbt
  • Fix incorrect section y coordinates used in experimental optimization (Thanks to jcw780)