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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)

Show fewer
Boostify Boostify Cell Shader Cell Shader ContentCreatorsTool ContentCreatorsTool Better & Enhanced Better & Enhanced Cobblemon Adventure - Pokemon modpack Cobblemon Adventure - Pokemon modpack Lumen Packs Lumen Packs Qearioz's Optimized PvP & SMP Qearioz's Optimized PvP & SMP 363帆的原版美化 363帆的原版美化 TABSMP Modpack TABSMP Modpack GeoRail GeoRail Better Vanilla Combat Better Vanilla Combat MTR Railway Network Access - Lite Edition MTR Railway Network Access - Lite Edition BottomlessThought's Realism BottomlessThought's Realism 简约生电优化 Simplicity Survival Optimization 简约生电优化 Simplicity Survival Optimization S-Rank Studios Cobblemon S-Rank Studios Cobblemon Cozy Cozy Jam Hardcore Jam Hardcore Immersive Wither Storm Immersive Wither Storm JSMP - recreated JSMP - recreated PonyCraft a New Generation Vanilla PonyCraft a New Generation Vanilla SimplyVanilla SimplyVanilla DrDonut DrDonut Cobblemon - Pokekingdoms Cobblemon - Pokekingdoms Fully Optimized 2 (Built in Shaders) Fully Optimized 2 (Built in Shaders) VisionSteps VisionSteps Cobblemon CobbleLocke - Nuzlocke Randomlocke Server Cobblemon CobbleLocke - Nuzlocke Randomlocke Server AVE - Amethyst Vanilla Extended AVE - Amethyst Vanilla Extended ROG Ally Modpack ROG Ally Modpack Helix Modpack Helix Modpack Cobblemon Vulkan Cobblemon Vulkan Scurz PvP Scurz PvP Optimal Optimization Optimal Optimization Wxrlds's Optimisations Wxrlds's Optimisations BGM BGM Ultra Optimized Ultra Optimized Technetium Technetium Valkaw Client Valkaw Client NecoPack NecoPack Neon Neon OPKoffee Infused OPKoffee Infused Vulkan Plus QoL Vulkan Plus QoL Cobblemon PokeFactory Cobblemon PokeFactory Cobblemon Dystoria Cobblemon Dystoria L&M Essentials L&M Essentials Yes Nicer MC [Fabric] YNM Yes Nicer MC [Fabric] YNM Big Globe Optimized (FABRIC) Big Globe Optimized (FABRIC) Compbuild Luminium Compbuild Luminium Performium: Continued Performium: Continued Pix Android Boost Pix Android Boost Proximity Optimized Vanilla Proximity Optimized Vanilla Optimal Survival Optimal Survival SuperSMP Pack SuperSMP Pack Blockbusters Blockbusters A Toca da Coruja A Toca da Coruja Christmas Dreams Christmas Dreams Kuri's FreshVanilla Kuri's FreshVanilla Fastest Client Fastest Client Useful Client-Side Tweaks Useful Client-Side Tweaks Wynncraft DELUXE Wynncraft DELUXE TEDS Plus TEDS Plus Gateways Gateways Realistic Minecraft - Frealism Realistic Minecraft - Frealism Cobblemon Optimized [FABRIC] Cobblemon Optimized [FABRIC] Dark Fantasy Reborn Dark Fantasy Reborn cloudmoon cloudmoon HyperForged - A Curated FPS & Performance Pack HyperForged - A Curated FPS & Performance Pack StickCraft Gamepad Edition StickCraft Gamepad Edition Cobblemon AU Cobblemon AU Borukva Modpack Borukva Modpack Tinycraft Tinycraft Java+ Java+ lwkSlick's PvP Modpack lwkSlick's PvP Modpack Better Than Basics Better Than Basics ApolloOptimized ApolloOptimized Asphalt Asphalt Chronicles of Arda Chronicles of Arda Cataclysmic Cataclysmic editon's Modpack editon's Modpack DirtTW's Basement Optimize Pack DirtTW's Basement Optimize Pack Better & Enhanced: Client Edition Better & Enhanced: Client Edition Cobblemon Trailblazer's Modpack Cobblemon Trailblazer's Modpack KITTENTHEIII's VR MODPACK KITTENTHEIII's VR MODPACK NeebsCraft NeebsCraft emad modpack emad modpack Cobblemon LowHand Extreme Optimize Mobile pc Cobblemon LowHand Extreme Optimize Mobile pc Cobblemon Origins Cobblemon Origins Wynncraft Refined Fruma Additions Wynncraft Refined Fruma Additions BareBonesCraft+ BareBonesCraft+ Vulkan Chapter Of Potato PVP Vulkan Chapter Of Potato PVP Perfectly Optimized (Fabric) Perfectly Optimized (Fabric) Stay-Clear! Stay-Clear! Growth VR Growth VR StormForge Pack StormForge Pack Create Delight Create Delight Optimus Optimus Vanilla QOL Improved Vanilla QOL Improved Yeemo Yeemo RedstoneToolkit RedstoneToolkit Cobblemon Eclipse Cobblemon Eclipse DeckCraft DeckCraft

External Resources

CurseForge Modrinth Source Code