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Krypton

Mod

by tuxed

A mod to optimize the Minecraft networking stack

Type

Mod

CurseForge Downloads

37,868,344

CurseForge ID

428912

Modrinth Downloads

44,885,218

Modrinth ID

fQEb0iXm

Last Updated

Nov 7, 2026

Description

Warning

I do not provide any guarantees about Krypton's stability, compatibility with other mods, or support for every possible setup out there.

Support for this mod is provided on a "best-effort" basis.

I have held down a very demanding job since November 2021. I consider this mod to be effectively feature-stable and will generally only provide updates for new Minecraft versions on an as-needed basis, based on my personal availability.

Don't ask if you can adopt this mod. I've done this few times before. It has not gone well, so don't ask.

What's Krypton?

Krypton (from Ancient Greek kryptos, "the hidden one") is a Fabric mod that attempts to optimize the Minecraft networking stack. It derives from work done in the Velocity and Tuinity projects.

Krypton contains several optimizations, including:

  • Highly optimized Netty handlers derived from the Velocity proxy, which I am the developer of. These handlers have sen real-world usage and extensive profiling, and strategically deploy native code where it makes the most sense.
  • Flush consolidation to lower server CPU usage (and reducing the impact from hardware security vulnerabilities which exploit speculative execution) and lower server tick times.
  • Micro-optimizations to reduce memory usage and improve packet serialization speeds.

Please join my Discord to discuss the mod or get support.

Compatibility

Krypton should work anywhere where a Minecraft can run — naturally, however, it is tuned for Linux.

I try to ensure that Krypton will work with the Fabric API, Lithium, and Sodium. Support beyond these mods is provided on a best effort basis.

Compatibility

Mod Loaders

Client Fabric Server

Game Versions

26.3

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.

View on Amazon →

As an Amazon Associate I earn from qualifying purchases.

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Included in Modpacks (1,024)

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Project Iris Event Project Iris Event FABLE Modpack FABLE Modpack Snorland Cobblemon Snorland Cobblemon Trailer Vibes Trailer Vibes Sackpack Sackpack Resimlrr Optimized Vone Resimlrr Optimized Vone NM modpack NM modpack Zomb's PvP Optimization Zomb's PvP Optimization uh optimization uh optimization Pokeheros 2 Pokeheros 2 Strawberry Crew [NeoForge] Strawberry Crew [NeoForge] Hypixel Skyblock, Optimizations, and Visuals (SOV) Hypixel Skyblock, Optimizations, and Visuals (SOV) Cobblemon Trailblazers Cobblemon Trailblazers Two Tails Craft Two Tails Craft Gun Isekai Gun Isekai Eternity SMP Eternity SMP The Milkyway SMP v1 beta (outdated) The Milkyway SMP v1 beta (outdated) THE VAULT BRUTAL FACTIONS THE VAULT BRUTAL FACTIONS Ziptastic (Server) Ziptastic (Server) Murkrid PvP Optimized Murkrid PvP Optimized Waymarked Waymarked LCLP's Mini Game Pack LCLP's Mini Game Pack Qwnks's Console Experience Qwnks's Console Experience Actions & Extra: Java Edition Actions & Extra: Java Edition project Moa. project Moa. Essentially Optimized Essentially Optimized Vircraft Modpack Vircraft Modpack vibrant experience vibrant experience Figuratives 2 Figuratives 2 MCBR Cobblemon - Mobile MCBR Cobblemon - Mobile PacPack Voxydized PacPack Voxydized Beboucraft Beboucraft VanillaReborn VanillaReborn One Heart One Slot One Heart One Slot Havenfall Reimagined Havenfall Reimagined Verbesserung Verbesserung CobblemonOrigins CobblemonOrigins Corroxin's optimizations Corroxin's optimizations RomixerX RomixerX Trailer Vibes Client Trailer Vibes Client Steve Fans Steve Fans uhpvp uhpvp Sodtesium Sodtesium Smooth Stone Smooth Stone Krümelchencraft Krümelchencraft BlueAxolotl BlueAxolotl Minemon -- A cobbleverse spinoff Minemon -- A cobbleverse spinoff Engineer's Journey Engineer's Journey Cobblemon Generations SMP Cobblemon Generations SMP Vanilla Bloom Vanilla Bloom Slick and Packed Slick and Packed Makenai Wynncraft Makenai Wynncraft PvP & Performance Mods PvP & Performance Mods Prism Optimized RPG Adventure [THE APEX] Prism Optimized RPG Adventure [THE APEX] [FMCS-L] fps X media X crystal x survival Optimized LITE [FMCS-L] fps X media X crystal x survival Optimized LITE Vulkanized Vulkanized Skyblock essentials (SE) Skyblock essentials (SE) Pixalis Plus – Performance & QoL Pixalis Plus – Performance & QoL pseudofred's Vanilla+ pseudofred's Vanilla+ amethyst pvp amethyst pvp Haydenmon Evolved Haydenmon Evolved Royalty Cobblemon Royalty Cobblemon Hypheria Hypheria Pix Vulka Optimizations Pix Vulka Optimizations loq loq The Kindred's Cobblemon Adventures The Kindred's Cobblemon Adventures Aloria Aloria BlazeCraft Infinite BlazeCraft Infinite medieval smp S4 medieval smp S4 Project Solaris Modpack Project Solaris Modpack Cobble Lemon Cobble Lemon TSpack TSpack One Click Optimization. One Click Optimization. Valley Land Valley Land Fast and Better Vanilla Fast and Better Vanilla universal modpack universal modpack Eclipse Client Eclipse Client Axo's Optimizations Axo's Optimizations Visual Overhaul Visual Overhaul Evangelium Modpack Evangelium Modpack Outerworlds Outerworlds Cozy Visuals Cozy Visuals Survival Discovered for minecraft Simplis Simplis VtubersPlayCobblemon VtubersPlayCobblemon Builtechraft Client Mods Builtechraft Client Mods Cobblemon Odyssey MMORPG Cobblemon Odyssey MMORPG LastHope LastHope OptiFabricium OptiFabricium Slemprix's Essentials Slemprix's Essentials Angels PvP Pack Angels PvP Pack FugCraft FugCraft Silver's Cobblemon Silver's Cobblemon FroggyCraft FroggyCraft Potato RPG - Performance Meets Adventure Potato RPG - Performance Meets Adventure Vanilla Peak Vanilla Peak CloudyWorlds Modpack CloudyWorlds Modpack Zynirium Zynirium Master Farmer's Master Farmer's VortexCraft VortexCraft

External Resources

CurseForge Modrinth Source Code