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Krypton project artwork

CurseForge · Minecraft mod

Krypton

A mod to optimize the Minecraft networking stack

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Krypton release matches 1.20.4 Fabric?

Updated 17 days ago
Best match for your filters Krypton 0.2.6
Game version 1.20.2, 1.20.3, 1.20.4
Loader Fabric

Krypton 0.2.6 targets 1.20.2, 1.20.3, 1.20.4 with Fabric. The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server. No extra mods listed for this file.

Where it goes

Is Krypton required on the client, server, or both?

The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.

Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release Fabric
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

What else does Krypton 0.2.6 need?

Krypton 0.2.6 on 1.20.4 Fabric. Every mod below is checked against that same setup.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add Krypton without breaking your instance.

Built for Krypton 0.2.6 on 1.20.4 Fabric. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use Krypton 0.2.6. It targets 1.20.2, 1.20.3, 1.20.4 with Fabric; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    This file does not list any required mods. Do not add a library just because a different file uses it.

  3. 03

    Put it on the correct side

    The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside Krypton 0.2.6. It opens that exact file at the source.

About this project

What does Krypton add?

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.

Project description from CurseForge.

Pick your setup

Krypton by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

39 available setups

Showing the newest 12 of 38 game versions. Older files are in the list below.

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Krypton versions and loaders

3 of 22 releases match
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Looking for an older file? The official CurseForge project page is in Resources.