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

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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 basic optimizations
• Support RecastLib (Velocity Native rewritten in Rust, compatible with Windows x64/arm64)
• Support NeoForge/Forge

About RecastLib

RecastLib is written in Rust and coexists with VelocityNative to improve performance in some scenarios.

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.

RecastLib Compatibility

• Windows x64
• Windows ARM64
• Linux x64

VelocityNative Compatibility

• Linux x64
• Linux ARM64
• MacOS ARM64

Config

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

Parameter	Description	Default value
velocity.natives-disable	Disable Native	false
velocity.linux-recast-enabled	Enable RecastLib for Linux	false

example:

java -Dvelocity.linux-recast-enabled=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

The Benchmark results are not necessarily accurate, and the final results are determined based on different JVM distributions, startup parameters, and random factors.

I don't have a native Linux development environment; all my Linux tests are done in WSL2 (Windows Subsystem for Linux), which can bring about ~15%-25% additional loss.

Those tiny performance differences of about 1% can be considered as a random result.

Benchmark cannot simulate all scenarios, and the results are used only as reference.

View

VarInt & VarLong | View in JMH Visualizer

Native Compress for Windows {RecastLib2} | View in JMH Visualizer

Native Compress for WSL2 {RecastLib2} | View in JMH Visualizer

Native Compress for WSL2 {VelocityNative} | View in JMH Visualizer

How to run Benchmark?

After clone KryptonFNP repo, execute ./gradlew :common:jmh in the mod directory. After waiting for 50–90 minutes, the result will be generated to common/build/results/jmh/results.json

License

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