Krypton FNP

This mod is an unofficial port of Krypton Fabric, designed to provide Forge & NeoForge compatibility.

If you are looking for KryptonFNP Fabric, visit from the following link: Modrinth

---

Krypton is a mod that attempts to optimize the Minecraft networking stack. It derives from work done in the Velocity, VelocityNT Recast and Paper projects.

Krypton derives itself from Ancient Greek kryptos, which means "the hidden one". This makes it evident most of the benefit from Krypton is "hidden" but is noticeable by a server administrator.

The wiki contains important information – read it.

Feature

• More related minor optimizations
• Implemented RecastLib
• Support NeoForge/Forge

What is RecastLib

RecastLib is a native library I wrote in Rust that is compatible with Velocity Native JNI Bind.

It aims to make up for some of the shortcomings of Velocity Native compatibility, thereby making the performance advantages of KryptonFNP more comprehensive.

In KryptonFNP for Fabric, I’m also testing the stability of the FFM APIs available in Java 22, which, according to benchmarks, should provide more performance gains (ultimately Fabric only. Forge/NeoForge won’t be able to run them).

Their benefits are obvious that both Server and Client can benefit, and that most popular PCs can run these native libraries due to the replacement compatibility.

Compatibility

System & Arch	RecastLib	Velocity Native
Windows x64	Yes	No
Windows arm64	Yes	No
Linux x64	Yes	Yes
Linux arm64	No	Yes
MacOS arm64 (Apple Silicon)	No	Yes

Currently, there are no plans to provide compatibility for Android, 32-bit architecture operating systems, or other architectures.

Please do not open any related issues or complain to me, even if you do, I can't help.

Config

Add the following parameters to the Java startup parameters to control the feature enablement:

Parameter	Description	Default value
velocity.natives-disable	Disable Native	false
velocity.linux-recast-enabled	Enable RecastLib for Linux	false
krypton.loginVT	-	true
krypton.textFilterVT	-	true
krypton.utilVT	-	true
krypton.bestVarLong	-	true

For more configuration, see the configuration file

example:

java -Dvelocity.natives-disable=true -jar neoforge_launcher.jar

Use env instead of jvm args

Some configuration items support using environment variables instead of jvm args.

JVM ARGS	Environment Variable
velocity.linux-recast-enabled	ENABLE_LINUX_RECAST

Benchmark

For Modpack

If you comply with the license, you can use it freely for Modpack.

Modpacks that redistribute Minecraft game body (i.e. packages that package the entire Minecraft game including Mod files, Config, ShaderPacks, ResourcePacks, Library and launcher into a whole zip file) are not allowed to use this mod.

License

This work has a restrictive license in addition to the original license to prevent some unexpected behavior, see 404Setup Public License