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Krypton

Mod

by tuxed

A mod to optimize the Minecraft networking stack

Type

Mod

CurseForge Downloads

37,867,215

CurseForge ID

428912

Modrinth Downloads

44,882,593

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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Jam Hardcore Jam Hardcore duziy's PvP Optimized duziy's PvP Optimized WarhammerCraft WarhammerCraft 3d blocks n' stuff 3d blocks n' stuff Nexus client Nexus client ContentCreatorsTool ContentCreatorsTool FemboyCraft FemboyCraft Kuri's FreshVanilla Kuri's FreshVanilla Thosh's Client Thosh's Client Conquest of the Bleak Isles Conquest of the Bleak Isles Performium: Continued Performium: Continued CordCraft Season 4 CordCraft Season 4 The Ultimate Experience The Ultimate Experience [Cobblemon] BlockeMon [Cobblemon] BlockeMon Turtle's Auxiliar Modpack Turtle's Auxiliar Modpack lwkSlick's PvP Modpack lwkSlick's PvP Modpack TABSMP Modpack TABSMP Modpack A beginning of Origins (Fabric) A beginning of Origins (Fabric) AdventureCrafts [Fabric] AdventureCrafts [Fabric] Vanilla Plus Vanilla Plus Simple Voice Chat - Fabric Preloaded Instance Simple Voice Chat - Fabric Preloaded Instance Qearioz's Optimized PvP & SMP Qearioz's Optimized PvP & SMP Best FPS For Pojav/Mojo Best FPS For Pojav/Mojo Cobblemon LowHand Extreme Optimize Mobile pc Cobblemon LowHand Extreme Optimize Mobile pc Minimoriya Pack Minimoriya Pack Cobblemon Apex Worlds Cobblemon Apex Worlds 363帆的原版美化 363帆的原版美化 Cobblemon AU Cobblemon AU Lumen Packs Lumen Packs Immersive Wither Storm Immersive Wither Storm Pojavlauncher+ Pojavlauncher+ Not Quite Optifine Not Quite Optifine Cozy Cozy Scurz PvP Scurz PvP Cloth and Armor Cloth and Armor Optimized + Optimized + Cobblemon Adventure - Pokemon modpack Cobblemon Adventure - Pokemon modpack DrDonut DrDonut Boostify Boostify SimplyVanilla SimplyVanilla BottomlessThought's Realism BottomlessThought's Realism Better & Enhanced Better & Enhanced A Toca da Coruja A Toca da Coruja Performatic Performatic Better Vanilla Combat Better Vanilla Combat MTR Railway Network Access - Lite Edition MTR Railway Network Access - Lite Edition GeoRail GeoRail Cobblemon - Pokekingdoms Cobblemon - Pokekingdoms HyperForged - A Curated FPS & Performance Pack HyperForged - A Curated FPS & Performance Pack Cell Shader Cell Shader Valkaw Client Valkaw Client ROG Ally Modpack ROG Ally Modpack Wxrlds's Optimisations Wxrlds's Optimisations Cobblemon Eclipse Cobblemon Eclipse 简约生电优化 Simplicity Survival Optimization 简约生电优化 Simplicity Survival Optimization JSMP - recreated JSMP - recreated Cataclysmic Cataclysmic Cobblemon CobbleLocke - Nuzlocke Randomlocke Server Cobblemon CobbleLocke - Nuzlocke Randomlocke Server Neon Neon PonyCraft a New Generation Vanilla PonyCraft a New Generation Vanilla Cobblemon Vulkan Cobblemon Vulkan VisionSteps VisionSteps Helix Modpack Helix Modpack Ultra Optimized Ultra Optimized Proximity Optimized Vanilla Proximity Optimized Vanilla S-Rank Studios Cobblemon S-Rank Studios Cobblemon Asphalt Asphalt Big Globe Optimized (FABRIC) Big Globe Optimized (FABRIC) Christmas Dreams Christmas Dreams Zalitherlauncher Boost FPS Zalitherlauncher Boost FPS AVE - Amethyst Vanilla Extended AVE - Amethyst Vanilla Extended Technetium Technetium L&M Essentials L&M Essentials OptiDroid OptiDroid Fully Optimized 2 (Built in Shaders) Fully Optimized 2 (Built in Shaders) Vulkan Plus QoL Vulkan Plus QoL NecoPack NecoPack Cobblemon Origins Cobblemon Origins shader and optimize shader and optimize Java+ Java+ BGM BGM Realistic Minecraft - Frealism Realistic Minecraft - Frealism SuperSMP Pack SuperSMP Pack Optimal Optimization Optimal Optimization FPSCraft for More FPS FPSCraft for More FPS Optimal Survival Optimal Survival Cobblemon Trailblazer's Modpack Cobblemon Trailblazer's Modpack Fabric-reinforced Lucky OneBlock Fabric-reinforced Lucky OneBlock Better Performance & Fps (BPF) Better Performance & Fps (BPF) TEDS Plus TEDS Plus Yes Nicer MC [Fabric] YNM Yes Nicer MC [Fabric] YNM Cobblemon PokeFactory Cobblemon PokeFactory Dark Fantasy Reborn Dark Fantasy Reborn RedstoneToolkit RedstoneToolkit Compbuild Luminium Compbuild Luminium Best PVP Modern Pack (BPMP) Best PVP Modern Pack (BPMP) Blockbusters Blockbusters OPKoffee Infused OPKoffee Infused editon's Modpack editon's Modpack cloudmoon cloudmoon

External Resources

CurseForge Modrinth Source Code