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Krypton

Mod

by tuxed

A mod to optimize the Minecraft networking stack

Type

Mod

CurseForge Downloads

36,490,214

CurseForge ID

428912

Modrinth Downloads

41,096,216

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 (880)

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New Revolution - An Improved Vanilla Experience | 1.21 UPDATE! Vanilla+ Lightweight | MC Vanilla+ 1.21.11 Vanilla+ Lightweight | MC Vanilla+ 1.21.11 Origins++ Modpack Origins++ Modpack More FPS [FABRIC] - SHADERS 1.21.11! More FPS [FABRIC] - SHADERS 1.21.11! FPSBOOST FPSBOOST Speed Of Light FPS Booster (SOL) With Shaders Speed Of Light FPS Booster (SOL) With Shaders Better Realism MC | Vanilla+ & Realism (Based on RealismCraft) Better Realism MC | Vanilla+ & Realism (Based on RealismCraft) Cobblemon Cobbletwo X MegaShowdown [1.7.3] (Pokemon Modpack) Cobblemon Cobbletwo X MegaShowdown [1.7.3] (Pokemon Modpack) Essentials Mods [FABRIC] - 1.21 RELEASE! Essentials Mods [FABRIC] - 1.21 RELEASE! VR experience | Immersion plus | [FABRIC] - [ 1.21.5!!] VR experience | Immersion plus | [FABRIC] - [ 1.21.5!!] Fabri's Frontiers Fabri's Frontiers More Animals [FABRIC] - 1.21 UPDATE! More Animals [FABRIC] - 1.21 UPDATE! Feather | Lightweight Vanilla+ Modpack Feather | Lightweight Vanilla+ Modpack Origins SMP Origins SMP Fuller's PokePack: cobblemon / pokemon modpack Fuller's PokePack: cobblemon / pokemon modpack Keo Vanilla Keo Vanilla Actions on Java Actions on Java Roanoke Cobblemon Roanoke Cobblemon OpalFab (OptiFine alternatives on Fabric) OpalFab (OptiFine alternatives on Fabric) Survival Tools Survival Tools Medieval Immersed Medieval Immersed Easycraft (Official) Easycraft (Official) Nizco's Cobblemon Adventures 2 Nizco's Cobblemon Adventures 2 More Decorations [FABRIC] - 1.21 UPDATE! More Decorations [FABRIC] - 1.21 UPDATE! Insomnia: Hardcore | Origins, Bosses, Skills Insomnia: Hardcore | Origins, Bosses, Skills Voxyris Voxyris Cobblemon Apex Cobblemon Apex Kooplemon Kooplemon PvP Optimized PvP Optimized Cobblemon Plus+ The Top Pokemon Adventure in Cobblemon - Cobblemon 1.7.3 - Mega Cobblemon - Pokemon Legendaries - Fully Optimize Cobblemon Plus+ The Top Pokemon Adventure in Cobblemon - Cobblemon 1.7.3 - Mega Cobblemon - Pokemon Legendaries - Fully Optimize Kuri's Fresh (Actions & Stuffs recreation) Kuri's Fresh (Actions & Stuffs recreation) Fabric's Optifine Fabric's Optifine DUNQOL DUNQOL Cobblemon Rivals- Best Cobblemon Server Cobblemon Rivals- Best Cobblemon Server Arcane Dragons [FABRIC] Arcane Dragons [FABRIC] oopsi! your everyday modpack! (with cosmetics, fullbright, keystrokes, minimap and more) oopsi! your everyday modpack! (with cosmetics, fullbright, keystrokes, minimap and more) Cobblemon Ultimate Pokemon RPG - Cobblemon 1.7.3 - Cobblemon with Friends - Pokemon in Minecraft - Pokemon RPG & MMO Cobblemon Ultimate Pokemon RPG - Cobblemon 1.7.3 - Cobblemon with Friends - Pokemon in Minecraft - Pokemon RPG & MMO PvP PvP Dungeons & Mineshafts: 5th Edition Dungeons & Mineshafts: 5th Edition More Realistic [FABRIC] - 1.21 UPDATE! More Realistic [FABRIC] - 1.21 UPDATE! Enhanced FPS Enhanced FPS VanillaSquad VanillaSquad Nizco's Cobblemon Adventures Nizco's Cobblemon Adventures Shaders - Working Shaders - Working Nizco's Cobblemon Horizons Nizco's Cobblemon Horizons Newt+ (Sodium Edition) Newt+ (Sodium Edition) Fabric Boosted Fabric Boosted Vulkan Optimization Vulkan Optimization Progress: Create Progress: Create EZ FPS And The Features For Pojav/Mojo EZ FPS And The Features For Pojav/Mojo Wynncraft Plus [LITE] Wynncraft Plus [LITE] Deez FPS [Vulkan Edition] Deez FPS [Vulkan Edition] MTR Railway Network Access - Standard Edition MTR Railway Network Access - Standard Edition Fps+ BOOST FPS Fps+ BOOST FPS Wynnic Enchantments Wynnic Enchantments Fiyrthgu's Hypixel Skyblock Modpack Fiyrthgu's Hypixel Skyblock Modpack ALAND's Immersive Hypixel SkyBlock ALAND's Immersive Hypixel SkyBlock Forget Me Not Forget Me Not LUNAR PVP LUNAR PVP More Dungeons [FABRIC] - 1.21 UPDATE! More Dungeons [FABRIC] - 1.21 UPDATE!

External Resources

CurseForge Modrinth Source Code