ZXC – Asymmetric, +40% decode vs. LZ4 on ARM (C, BSD-3, Fuzzed)

In plain words

ZXC is a data compression library written in C that delivers 40% better decoding performance than LZ4 on ARM processors. Released under the BSD-3 license, it is designed for developers who need efficient decompression on ARM-based systems. The library has undergone fuzzing testing to ensure reliability and stability. It is suitable for embedded systems, mobile applications, and other ARM environments where decompression speed is critical.

written from the facts on this page · September 2026

From the sources

Lossless compression C library built for ultra-fast decode. Faster than LZ4 (40-75%+ on ARM64), at a better ratio. Official Rust, Python, Node.js, Go and WASM bindings. Write-once/read-many, with optional seekable archives for O(1) random access. - hellobertrand/zxc

In the maker’s words, at launch

Hello HN, author here. I built ZXC, a lossless compression library designed specifically for "Write Once, Read Many" scenarios (Game assets, Firmware, App bundles). The Concept: Standard real-time codecs (LZ4, Snappy) are designed for symmetry. ZXC explores an asymmetric approach: it spends significantly more CPU…

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