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Lithium (Fabric/NeoForge)

An optimization mod for Minecraft which improves server performance significantly.

File Details
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Lithium mc1.21.11-0.21.3 for Neoforge

By2No2Name
  • R
  • Feb 7, 2026
  • 847.02 KB
  • 47.9K
  • 1.21.11
  • NeoForge

File Name

lithium-neoforge-0.21.3+mc1.21.11.jar

Supported Versions

  • 1.21.11

Curse Maven Snippet

NeoForge

implementation "curse.maven:lithium-360438:7587008"
Curse Maven does not yet support mods that have disabled 3rd party sharing

Learn more about Curse Maven

Lithium 0.21.3 for Minecraft 1.21.11 adds several optimizations and 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 item frames with maps lag when many players are online
  • Use chunk aware block search for mob supporting block (Thanks to jcw780)
  • Update chunk serialization optimization (Thanks to ishland)
  • Allow hoppers to sleep when empty input inventory has comparators
  • Sculk sensor, catalyst and shrieker sleeping

Fixes

  • Use correct height limit and chunk loading order in portal POI optimization (Thanks to jcw780)
  • Wake sleeping hoppers when double chests above them have comparators placed nearby