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Krypton

Mod

by tuxed

A mod to optimize the Minecraft networking stack

Type

Mod

CurseForge Downloads

36,495,383

CurseForge ID

428912

Modrinth Downloads

41,113,908

Modrinth ID

fQEb0iXm

Last Updated

Sep 12, 2026

Description

Warning

Krypton is a work-in-progress. I do not provide any guarantees about its stability, compatibility with other mods, or support for every possible setup out there. Support for this mod is provided on a "best-effort" basis. This is not my day job, it is a hobby growing out of related work I've done.

Sponsor Me!

Did this mod make your server playable? Chip in a bit of money so I can continue developing it.

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

Fabric

Game Versions

1.16.2 1.16.3 1.16.4 1.16.5 1.17 1.17.1 1.18.1 1.18.2 1.19 1.19.1 +26 more

Recommended Gear

Affiliate

Hardware and extras that pair well with this mod.

LEGO Minecraft Set

LEGO Minecraft Set

Official sets that translate the building side of the game off-screen.

View on Amazon →

As an Amazon Associate I earn from qualifying purchases.

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Included in Modpacks (884)

Show fewer
BlazeCraft Infinite BlazeCraft Infinite Hypixel Skyblock, Optimizations, and Visuals (SOV) Hypixel Skyblock, Optimizations, and Visuals (SOV) Slemprix's Essentials Slemprix's Essentials Sackpack Sackpack Grubbs' Cozy Craft Grubbs' Cozy Craft The Kindred's Cobblemon Adventures The Kindred's Cobblemon Adventures universal modpack universal modpack Optimized Vanilla Extra (OVE) Optimized Vanilla Extra (OVE) Vanilla Bloom Vanilla Bloom Stars Optimized Stars Optimized Minecraft: Promo Edition Minecraft: Promo Edition Roimy Zomsa’s Lightweight Mods Roimy Zomsa’s Lightweight Mods CobbleQuests CobbleQuests COBBLEPOKEMON COBBLEPOKEMON Outerworlds Outerworlds uh optimization uh optimization NEOM MTR Axo's Optimizations Axo's Optimizations vibrant experience vibrant experience FLUSTIFY OPTI LITE FLUSTIFY OPTI LITE Decorator Pack Decorator Pack OptiFabricium OptiFabricium Intelligento's Building Mods Intelligento's Building Mods Show me the Fantastic Create Show me the Fantastic Create Sodium PvP Sodium PvP FugCraft FugCraft The True Vanilla The True Vanilla Optimization Foundation Optimization Foundation MrOptituber MrOptituber OptimisticMC PvP OptimisticMC PvP My Hero Legacy My Hero Legacy Prism Optimized RPG Adventure [THE APEX] Prism Optimized RPG Adventure [THE APEX] Redstone Witch [Lite] Redstone Witch [Lite] Funtime FPS+ Funtime FPS+ FurCraft FurCraft medieval smp S4 medieval smp S4 Create Refabricated Create Refabricated BBS BD BBS BD Just Optimised Just Optimised Turkuć SMP: PENTIMENTO Turkuć SMP: PENTIMENTO WrightCraft WrightCraft BlackRose's Shenanigans The Better Pokeblocks Modpack The Better Pokeblocks Modpack Pix Vulka Optimizations Pix Vulka Optimizations Master Farmer's Master Farmer's FlamePack Re-Vulkanized FlamePack Re-Vulkanized Shivtanium Client Shivtanium Client Sprinter Modpack Sprinter Modpack JustPack JustPack Epic Adventure Craft: Super Survival Epic Adventure Craft: Super Survival ZenCobblemon ZenCobblemon Vulkan Vitalised Vulkan Vitalised Mire 2077 Mire 2077 Trailer Vibes Client Trailer Vibes Client MironMC - Cobblemon MironMC - Cobblemon DittoLand Cobblemon DittoLand Cobblemon Zomb's PvP Optimization Zomb's PvP Optimization One Click Optimization. One Click Optimization. Golden Hearth Golden Hearth Cobblemon Generations SMP Cobblemon Generations SMP Ideal Vanilla Ideal Vanilla Neutron7ix-Pokemon-Unbound Neutron7ix-Pokemon-Unbound Hig Hig Save My PC Save My PC Mococoa Mococoa Age of the Ring Server Pack Age of the Ring Server Pack Sodtesium Sodtesium The ELemental Deathcord Smp The ELemental Deathcord Smp Survival singleplayer/multiplayer Survival singleplayer/multiplayer Miras's modpack for phones Miras's modpack for phones [FMCS-H] fps X media X crystal x survival Optimized HIGH [FMCS-H] fps X media X crystal x survival Optimized HIGH EwMedieval Modpack EwMedieval Modpack Vanillium - A Better Vanilla Experience Vanillium - A Better Vanilla Experience Ferrora Ferrora Jitsonville Pack Jitsonville Pack Corroxin's optimizations Corroxin's optimizations Engineered Realms Engineered Realms Hypheria Hypheria PSG BOOST PSG BOOST Builtechraft Client Mods Builtechraft Client Mods SkyBloke SkyBloke Angels PvP Pack Angels PvP Pack PokeCube PokeCube VortexCraft VortexCraft LeafiumBoost LeafiumBoost EdonMe Survival EdonMe Survival Cody's Cobblemon Adventure Cody's Cobblemon Adventure KeeKee's SMP Complete KeeKee's SMP Complete Vanilla Mastered Vanilla Mastered The House Diablo Cobblemon Experience The House Diablo Cobblemon Experience KeeKee's SMP Visual KeeKee's SMP Visual Potato RPG - Performance Meets Adventure Potato RPG - Performance Meets Adventure Bastelgruppen Client Bastelgruppen Client Хрєкотрон Хрєкотрон Cobblemon Cosmos Cobblemon Cosmos Yet Another Vanilla But Better (YAVBB) Yet Another Vanilla But Better (YAVBB) ELEV8 ELEV8 WMI Experience WMI Experience Zynirium Zynirium Better Cobblemon Adventure with friends Better Cobblemon Adventure with friends

External Resources

CurseForge Modrinth Source Code