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Lithium (Fabric/NeoForge) logo

Lithium (Fabric/NeoForge)

Mod

by JellySquid

An optimization mod for Minecraft which improves server performance significantly.

Type

Mod

CurseForge Downloads

102,087,186

CurseForge ID

360438

Modrinth Downloads

141,528,159

Modrinth ID

gvQqBUqZ

Last Updated

Nov 7, 2026

Description

Lithium is a modern, general-purpose optimization mod for Minecraft which works to improve a number of systems (game physics, mob AI, block ticking, etc) with the goal of not changing any vanilla mechanics.


The mod works on both the client and server, and can be installed on servers without requiring clients to also have the mod (and vice versa.)


For multiplayer servers, administrators can expect a sizeable improvement to tick times, allowing their hardware to support more loaded entities, chunks, and players. Even in single-player, Lithium helps to improve performance by optimizing the internal game server, which is used for "ticking" the world. This can free up your computer's processor to focus on other tasks, resulting in improved frame rates and increased responsiveness.


The strict goal of maintaining exact behavior with vanilla makes Lithium suitable for almost any Minecraft server running Fabric, even for highly complex gameplay scenarios and creations. In fact, our continued insistence towards not changing vanilla gameplay has even led to the mod being officially allowed in Minecraft speedrunning.


Installation

Make sure you have the latest version of Fabric Loader present and then simply drop the mod into your mods folder. No other mods or additional setup (not even Fabric API!) is required. You do not need to create new worlds in order to take advantage of the mod.


While you're at it, you may want to check out Sodium, which improves rendering performance.


Configuration

Lithium makes use of an semi-unusual configuration system which allows you to enable or completely disable patches the mod applies. This system allows fine-grained control over what code in Minecraft is modified by Lithium, and as such, can be used to completely eliminate bugs or mod incompatibilities introduced by the mod.


For more information, please read the wiki entry on modifying your configuration file.


Please note: An empty configuration file is perfectly normal and just means you want to use the default options, which are already set up out of the box for the best performance the mod can offer.


Reporting Issues

Please use the issue tracker linked at the top of the page to report bugs, crashes, and other issues.

Compatibility

Mod Loaders

Fabric Neoforge Quilt

Game Versions

1.16.2 1.16.3 1.16.4 1.16.5 1.17 1.17.1 1.18 1.18.1 1.18.2 1.19 +28 more

Recommended Gear

Affiliate

Hardware and extras that pair well with this mod.

Mini PC for self-hosting

Mini PC for Self-Hosting

A low-power box that can sit in a cupboard and run a modded server around the clock.

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Included in Modpacks (3,812)

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All The Trains MTR All The Trains MTR Identity Multiplayer Identity Multiplayer FPS Modpack Fork FPS Modpack Fork Crystal Tierlist Crystal Tierlist Generations (Forge) (Cobblemon) Generations (Forge) (Cobblemon) Recording Client for Content Creators (Servers & Singleplayer) Recording Client for Content Creators (Servers & Singleplayer) Create Guns and Boats Create Guns and Boats Gambling Craft Gambling Craft BigStarGuys - BigChadGuys x Cobblemon Star Academy BigStarGuys - BigChadGuys x Cobblemon Star Academy vanilla experience : the best client-side modpack vanilla experience : the best client-side modpack Creative Mode: A Create Experience Creative Mode: A Create Experience Diamond Age Diamond Age OptimisticMC OptimisticMC Glade Glade Allure: Clientside Enhancements Allure: Clientside Enhancements KonoSuba: God's Blessing on This Wonderful World KonoSuba: God's Blessing on This Wonderful World Cobblemon Realms Lite Cobblemon Realms Lite Smooth Matcha Smooth Matcha Jam Hardcore Jam Hardcore duziy's PvP Optimized duziy's PvP Optimized Performa Performa OptiPrime OptiPrime 3d blocks n' stuff 3d blocks n' stuff Realistika (Realistic) Realistika (Realistic) Nexus client Nexus client ContentCreatorsTool ContentCreatorsTool Better Adventures ++ Core Better Adventures ++ Core All of Yungs All of Yungs Lucky World Invasion - Survivor Lucky World Invasion - Survivor FemboyCraft FemboyCraft Belgie's Create SMP S6 Belgie's Create SMP S6 Project 4J Project 4J Kuri's FreshVanilla Kuri's FreshVanilla Thosh's Client Thosh's Client FPS+ (FPS Plus) FPS+ (FPS Plus) barce's vanilla experience barce's vanilla experience Beyond Survival (BYSL) Beyond Survival (BYSL) Better Survival (BSurvival) Better Survival (BSurvival) Loka Fabric Loka Fabric Conquest of the Bleak Isles Conquest of the Bleak Isles Performium: Continued Performium: Continued All About Decoration - Building & Furniture All About Decoration - Building & Furniture Hexwoven Hexwoven Redstone Optimized Redstone Optimized Tensura Tomfoolery Tensura Tomfoolery Veloxy's Pack Veloxy's Pack Unaltered+ Unaltered+ CordCraft Season 4 CordCraft Season 4 The Ultimate Experience The Ultimate Experience Splitted Multiplayer Splitted Multiplayer ARG ARG Tinker's Tavern: Cobblemon Tinker's Tavern: Cobblemon CobbleCraft CobbleCraft [Cobblemon] BlockeMon [Cobblemon] BlockeMon The Gallo's Horizons (Distant Horizons) The Gallo's Horizons (Distant Horizons) Custom morph Custom morph Dioses Performance+ | Used by Vegetta777 & Willyrex Dioses Performance+ | Used by Vegetta777 & Willyrex Adaptive Adaptive Tukel Realism (ModernArch 128x - Distant Horizons - Shader - Physics) Tukel Realism (ModernArch 128x - Distant Horizons - Shader - Physics) All you need: Mace PVP All you need: Mace PVP Tensura Resurrection Tensura Resurrection [Cobblemon] PokeClash+ [Cobblemon] PokeClash+ Oritech+ | Oritech & Create Addons and Create Aeronautics Oritech+ | Oritech & Create Addons and Create Aeronautics QoL Client QoL Client lwkSlick's PvP Modpack lwkSlick's PvP Modpack 1000 Ways to Explode 1000 Ways to Explode LifeOre Create S1 LifeOre Create S1 TABSMP Modpack TABSMP Modpack A beginning of Origins (Fabric) A beginning of Origins (Fabric) AdventureCrafts [Fabric] AdventureCrafts [Fabric] Vanilla+ Vanilla+ Vanilla Plus Vanilla Plus Rizmotopia - Barebones Rizmotopia - Barebones The Createville Pack The Createville Pack Optimus Optimus Revelations 3 - just Tech N' building! Revelations 3 - just Tech N' building! FrozenBlock FrozenBlock Antique Runes: Medieval RPG Antique Runes: Medieval RPG KyuSekai KyuSekai Simple Voice Chat - Fabric Preloaded Instance Simple Voice Chat - Fabric Preloaded Instance Qearioz's Optimized PvP & SMP Qearioz's Optimized PvP & SMP Best FPS For Pojav/Mojo Best FPS For Pojav/Mojo Ludo's Modpack Ludo's Modpack SBooster Official SBooster Official Cobblemon Optimised Cobblemon Optimised Beautifully Optimized Beautifully Optimized NSCOP生电客户端 NSCOP生电客户端 Volormon Volormon Essentials Mods - Halloween Edition [CurseForge Server] Essentials Mods - Halloween Edition [CurseForge Server] Cobblemon LowHand Extreme Optimize Mobile pc Cobblemon LowHand Extreme Optimize Mobile pc Minimoriya Pack Minimoriya Pack Cobblemon Apex Worlds Cobblemon Apex Worlds Prison Escape - Beginnings (reborn) Prison Escape - Beginnings (reborn) A Tale of Ice and Fire A Tale of Ice and Fire Survival Project Pack Survival Project Pack Dokuta Suton (Dr. Stone) Dokuta Suton (Dr. Stone) spook's setup spook's setup Wenton's silly gun and car thingy Wenton's silly gun and car thingy Essentials Preset Essentials Preset 363帆的原版美化 363帆的原版美化

External Resources

CurseForge Modrinth Source Code Issues