Lithium Mod is an optimization mod that reduces load and increases FPS in Minecraft. It is a universal mod that improves both game and server performance and can function for players as well as on servers. It allows for up to a 45% reduction in CPU load. The mod optimizes several areas, including physics calculations, mob AI, chunk loading, mob farms, and redstone circuits. It also comes with its own configuration file that enables users to disable optimizations for specific game aspects, ensuring better compatibility with other mods. Let me know if you’d like further assistance!

Lithium Fabric mod for minecraft logo

Features:

  • Physics optimizations: Entity collision detection has seen significant improvements through reducing the collision resolution complexity for simple, cuboid blocks. A more accurate algorithm is also used to reduce the number of blocks being checked every tick, especially in cases where entities are moving very quickly.
  • Mob AI optimizations: We make use of an event-based system for some tasks in order to reduce the CPU usage incurred by constantly polling the world for changes. Mob “brains” have also been optimized to select between different AI tasks much, much quicker than before. Comparison before and after here.
  • World generation optimizations: Many calculations in vanilla’s world generation are unnecessary and do not affect the final result, which gives ample opportunity for Lithium to optimize this overhead away.
  • Chunk loading optimizations: The temporary data structures used in block palette compaction have been changed to be much more efficient. This results in fewer TPS drops while players are exploring terrain and provides a modest boost to world load times. We also batch some verification operations to reduce unnecessary disk I/O.
  • Mob farm optimizations: Mob cramming is significantly less expensive as resolving collisions between entities has been optimized to take advantage of the fact that simple boxes are involved. This makes mob farms considerably less harmful for server tick rates.
  • Block ticking optimizations: has less overhead, making things such as block update settling after generating chunks and other Redstone contraptions faster. This also reduces the amount of time it takes for a block to determine if it is ticking by schedule from O(n), where n is the number of ticking blocks, to O(1), providing a significant speedup when many blocks are being ticked.
  • Explosion optimizations: Many optimizations have been applied to TNT and explosions alike, reducing their associated lag without changing how they behave. In particular, ray-tracing is optimized to take advantage of the fact that multiple steps through a way will occur in the same block position, allowing us to quickly re-use the previous step’s results. We also make use of a faster position tracking algorithm which avoids many excessive allocations.
  • Point of Interest optimizations: Complex mob AIs in Minecraft, primarily those belonging to Villagers and Pillagers, often need to find relevant points of interest in the world in order to choose the most appropriate AI task. In vanilla, querying all points within a chunk requires 16 separate retrievals through stream-heavy code. With Lithium present, this task is reduced to a single simple retrieval that makes use of a much faster (and traditional) iterator based approach, yielding anywhere from a 16-22x improvement for queries.
  • Data Tracker optimizations: The internal data manager used for tracking some entity state and properties has been optimized to use flat arrays and avoid expensive locking, providing a decent boost whenever these attributes are accessed during a game tick.
  • … And other internal improvements to help the JVM better optimize code.

Screenshots:

How to install:

Click the following link to view details: How to Install Mods for Minecraft Java Edition on PC: A Beginner Guide

Lithium Mod Download Links

All Files 39
Version Loader File Name Size Date Download
26.1 Fabric Quilt Lithium-Mod-Fabric-Quilt-26.1.jar 854 KB Mar 25, 2026
Neoforge Lithium-Mod-NeoForge-26.1.jar 847 KB Mar 25, 2026
1.21.11 Neoforge Lithium-Mod-NeoForge-1.21.11.jar 847 KB Mar 25, 2026
Fabric Quilt Lithium-Mod-Fabric-Quilt-1.21.11.jar 838 KB Mar 25, 2026
1.21.10 Fabric Quilt Lithium-Mod-Fabric-Quilt-1.21.10.jar 816 KB Mar 25, 2026
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.10.jar 811 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.10.jar 788 KB Mar 25, 2026
1.21.9 Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.9.jar 810 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.9.jar 788 KB Mar 25, 2026
1.21.8 Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.7.jar 774 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.7.jar 751 KB Mar 25, 2026
1.21.6 Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.6.jar 774 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.6.jar 751 KB Mar 25, 2026
1.21.5 Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.5.jar 749 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.5.jar 727 KB Mar 25, 2026
1.21.4 Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.4.jar 763 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.4.jar 741 KB Mar 25, 2026
1.21.3 Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.3.jar 719 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.3.jar 695 KB Mar 25, 2026
1.21.1 Fabric Quilt Lithium-Mod-Fabric-Quilt-1.21.1.jar 779 KB Mar 25, 2026
Neoforge Lithium-Mod-NeoForge-1.21.1.jar 732 KB Mar 25, 2026
Fabric Quilt Lithium-Mod-Fabric-Quilt-1.21.jar 779 KB Mar 25, 2026
Neoforge Lithium-Mod-NeoForge-1.21.jar 756 KB Mar 25, 2026
1.20.6 Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.20.6.jar 668 KB Mar 25, 2026
1.20.5 Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.20.5.jar 666 KB Mar 25, 2026
1.20.4 Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.20.4.jar 699 KB Mar 25, 2026
1.20.2 Fabric version Lithium-Mod-Fabric-1.20.2.jar 672 KB Mar 25, 2026
1.20.1 Fabric Quilt Lithium-Mod-Fabric-Quilt-1.20.1.jar 631 KB Mar 25, 2026
1.19.4 Fabric version Lithium-Mod-Fabric-1.19.4.jar 624 KB Mar 25, 2026
1.19.3 Fabric version Lithium-Mod-Fabric-1.19.3.jar 615 KB Mar 25, 2026
1.19.2 Fabric version Lithium-Mod-Fabric-1.19.2.jar 530 KB Mar 25, 2026
1.19.1 Fabric version Lithium-Mod-Fabric-1.19.1.jar 465 KB Mar 25, 2026
1.19 Fabric version Lithium-Mod-Fabric-1.19.jar 465 KB Mar 25, 2026
1.18.2 Fabric Lithium-Mod-Fabric-1.18.2.jar 433 KB Mar 25, 2026
1.18.1 Fabric version Lithium-Mod-Fabric-1.18.1.jar 439 KB Mar 25, 2026
1.17.1 Fabric version Lithium-Mod-Fabric-1.17.1.jar 434 KB Mar 25, 2026
1.16.5 Fabric Lithium-Mod-Fabric-1.16.3.jar 300 KB Mar 25, 2026
1.15.2 Forge version Lithium-Mod-1.15.2.jar 251 KB Mar 25, 2026
Fabric version Lithium-Mod-Fabric-1.15.2.jar 307 KB Mar 25, 2026
26.1
Fabric Quilt Lithium-Mod-Fabric-Quilt-26.1.jar
854 KB Mar 25, 2026
Neoforge Lithium-Mod-NeoForge-26.1.jar
847 KB Mar 25, 2026
1.21.11
Neoforge Lithium-Mod-NeoForge-1.21.11.jar
847 KB Mar 25, 2026
Fabric Quilt Lithium-Mod-Fabric-Quilt-1.21.11.jar
838 KB Mar 25, 2026
1.21.10
Fabric Quilt Lithium-Mod-Fabric-Quilt-1.21.10.jar
816 KB Mar 25, 2026
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.10.jar
811 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.10.jar
788 KB Mar 25, 2026
1.21.9
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.9.jar
810 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.9.jar
788 KB Mar 25, 2026
1.21.8
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.7.jar
774 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.7.jar
751 KB Mar 25, 2026
1.21.6
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.6.jar
774 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.6.jar
751 KB Mar 25, 2026
1.21.5
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.5.jar
749 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.5.jar
727 KB Mar 25, 2026
1.21.4
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.4.jar
763 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.4.jar
741 KB Mar 25, 2026
1.21.3
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.21.3.jar
719 KB Mar 25, 2026
NeoForge version Lithium-Mod-NeoForge-1.21.3.jar
695 KB Mar 25, 2026
1.21.1
Fabric Quilt Lithium-Mod-Fabric-Quilt-1.21.1.jar
779 KB Mar 25, 2026
Neoforge Lithium-Mod-NeoForge-1.21.1.jar
732 KB Mar 25, 2026
Fabric Quilt Lithium-Mod-Fabric-Quilt-1.21.jar
779 KB Mar 25, 2026
Neoforge Lithium-Mod-NeoForge-1.21.jar
756 KB Mar 25, 2026
1.20.6
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.20.6.jar
668 KB Mar 25, 2026
1.20.5
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.20.5.jar
666 KB Mar 25, 2026
1.20.4
Fabric/Quilt version Lithium-Mod-Fabric-Quilt-1.20.4.jar
699 KB Mar 25, 2026
1.20.2
Fabric version Lithium-Mod-Fabric-1.20.2.jar
672 KB Mar 25, 2026
1.20.1
Fabric Quilt Lithium-Mod-Fabric-Quilt-1.20.1.jar
631 KB Mar 25, 2026
1.19.4
Fabric version Lithium-Mod-Fabric-1.19.4.jar
624 KB Mar 25, 2026
1.19.3
Fabric version Lithium-Mod-Fabric-1.19.3.jar
615 KB Mar 25, 2026
1.19.2
Fabric version Lithium-Mod-Fabric-1.19.2.jar
530 KB Mar 25, 2026
1.19.1
Fabric version Lithium-Mod-Fabric-1.19.1.jar
465 KB Mar 25, 2026
1.19
Fabric version Lithium-Mod-Fabric-1.19.jar
465 KB Mar 25, 2026
1.18.2
Fabric Lithium-Mod-Fabric-1.18.2.jar
433 KB Mar 25, 2026
1.18.1
Fabric version Lithium-Mod-Fabric-1.18.1.jar
439 KB Mar 25, 2026
1.17.1
Fabric version Lithium-Mod-Fabric-1.17.1.jar
434 KB Mar 25, 2026
1.16.5
Fabric Lithium-Mod-Fabric-1.16.3.jar
300 KB Mar 25, 2026
1.15.2
Forge version Lithium-Mod-1.15.2.jar
251 KB Mar 25, 2026
Fabric version Lithium-Mod-Fabric-1.15.2.jar
307 KB Mar 25, 2026
39 files available

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