ZS Packet

Enhanced Network Performance

The ZS Packet modification fundamentally improves Minecraft's network connectivity by replacing the default packet compression system with the modern ZStandard algorithm. This solution provides significant acceleration in data transfer while simultaneously reducing data volume.

Required Conditions

For proper operation, the mod must be installed on both client and server. Additional dependencies are also required - MixinBooter and ConfigAnyTime.

Performance Testing Results

Comparative testing demonstrated impressive results when processing 1500 network packets totaling 34.0 MB:

Standard System (Deflater)
Execution time: 1564 ms
Compressed size: 3458 KB

ZS Packet with compression level 6
Execution time: 749 ms
Compressed size: 2718 KB

When using the sixth compression level, the mod demonstrates performance twice as high as the original system with improved data compression ratio.

Frequently Asked Questions

Can I connect to servers without ZS Packet if the mod is installed on the client?
Yes, this is possible - the client maintains backward compatibility.

Will servers with the installed mod accept players without ZS Packet?
No, in the current version the server cannot determine the compression algorithm of clients without the modification.

Compatibility Limitations

The mod does not work with popular proxy servers (BungeeCord, Velocity, etc.). For their integration, manual modification of packet decoders with added zstd compression support is required.

Solution: identify ZS Packet's special identifier -214748999 in the EnableCompression packet.

There is also no support for PojavLauncher for iOS due to incompatibility with ZStandard JNI bindings.