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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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DDR6 (Best Performance Modpack) DDR6 (Best Performance Modpack) ZenCobblemon ZenCobblemon EverWyn Survival EverWyn Survival Netherite-Client Netherite-Client Potainium Optimized Potainium Optimized Create Refabricated Create Refabricated Rosedalean SMP Modpack Rosedalean SMP Modpack EwMedieval Modpack EwMedieval Modpack Minecraft: Promo Edition Minecraft: Promo Edition Turkuć SMP: PENTIMENTO Turkuć SMP: PENTIMENTO Embervale SMP Embervale SMP Andy's Vanilla+ Modpack Andy's Vanilla+ Modpack Survival singleplayer/multiplayer Survival singleplayer/multiplayer FlamePack Re-Vulkanized FlamePack Re-Vulkanized Redstone Witch [Lite] Redstone Witch [Lite] SkyBloke SkyBloke Grubbs' Cozy Craft Grubbs' Cozy Craft DittoLand Cobblemon DittoLand Cobblemon MrOptituber MrOptituber Epic Adventure Craft: Super Survival Epic Adventure Craft: Super Survival Ideal Vanilla Ideal Vanilla FLUSTIFY OPTI LITE FLUSTIFY OPTI LITE CobbleQuests CobbleQuests Intelligento's Building Mods Intelligento's Building Mods Cobblemon Harmony Modpack Cobblemon Harmony Modpack Modded Bridge Modded Bridge [FMCS-H] fps X media X crystal x survival Optimized HIGH [FMCS-H] fps X media X crystal x survival Optimized HIGH Fishy's Client Fishy's Client Fabulously Fossils & Archeology Fabulously Fossils & Archeology Mutzman's Modpack Mutzman's Modpack PvP Tiers Pack PvP Tiers Pack The Frame Machine The Frame Machine Re-Crafted 2 Re-Crafted 2 GENMON GENMON PokeCube PokeCube Pvp Optimized Pack Pvp Optimized Pack VulkanizedPVP VulkanizedPVP The Artisan Frontiers The Artisan Frontiers Хрєкотрон Хрєкотрон Shivtanium Client Shivtanium Client Hisoka Optimized Hisoka Optimized Vanilla Mastered Vanilla Mastered Peformance Pack Peformance Pack Craft Attack 14 Pack Craft Attack 14 Pack JustPack JustPack PSG BOOST PSG BOOST Cozy Cobble Adventures Cozy Cobble Adventures espania saison 2 espania saison 2 The ELemental Deathcord Smp The ELemental Deathcord Smp Piekarnia Modpack Piekarnia Modpack WrightCraft WrightCraft A Toca da Coruja Modpack - Lite A Toca da Coruja Modpack - Lite Vulkan Vitalised Vulkan Vitalised Wonders Reimagined Wonders Reimagined Roimy Zomsa’s Lightweight Mods Roimy Zomsa’s Lightweight Mods Optimized Optimization Optimized Optimization Celerium Celerium Mococoa Mococoa Beyond Optimized Beyond Optimized CloverMTR CloverMTR KnopiaPack KnopiaPack Sprinter Modpack Sprinter Modpack Show me the Fantastic Create Show me the Fantastic Create Age of the Ring Server Pack Age of the Ring Server Pack Jannes Modpack Jannes Modpack Almost Pure Vanilla Almost Pure Vanilla vilmiComfort vilmiComfort Motions and Smooth Motions and Smooth Decorator Pack Decorator Pack Save My PC Save My PC Cody's Cobblemon Adventure Cody's Cobblemon Adventure Ferrora Ferrora Cherry Cobblemon Modpack Cherry Cobblemon Modpack Game Speed Optimized Game Speed Optimized VR Light Vanilla VR Light Vanilla Golden Hearth Golden Hearth Bastelgruppen Client Bastelgruppen Client KillManiac's modpack KillManiac's modpack The Better Pokeblocks Modpack The Better Pokeblocks Modpack Jellisy Vanilla Jellisy Vanilla Jitsonville Pack Jitsonville Pack Cobblemon Cosmos Cobblemon Cosmos The True Vanilla The True Vanilla MironMC - Cobblemon MironMC - Cobblemon Emberwild Journey Emberwild Journey Celestial: Reborn Celestial: Reborn Serenor Serenor Neutron7ix-Pokemon-Unbound Neutron7ix-Pokemon-Unbound SkullClient SkullClient Mire 2077 Mire 2077 KeeKee's SMP Complete KeeKee's SMP Complete Hig Hig Flamee Pack Flamee Pack EdonMe Survival EdonMe Survival ftehe's Vanilla+ ftehe's Vanilla+ Cobblemon - CobbleTowny Cobblemon - CobbleTowny ChaMods ChaMods KeeKee's SMP Visual KeeKee's SMP Visual GGPlays Cobblemon GGPlays Cobblemon LeafiumBoost LeafiumBoost

External Resources

CurseForge Modrinth Source Code