14,575 Downloads Last Updated: Feb 11, 2021 Game Version: 1.16.5

Krypton is a Minecraft mod designed for the Fabric mod loader that implements a suite of optimizations focused on the Minecraft networking stack. It works on both clients and servers, although it is the most useful on servers. Krypton's suite of optimizations can lower server CPU usage and decrease server tick times.

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Krypton is still in early development, but the optimizations provided today provide a basis for even more optimizations down the road.

  • 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,


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