Life & fun · December 17, 2025
ZXC – Asymmetric, +40% decode vs. LZ4 on ARM (C, BSD-3, Fuzzed)
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 cycles at compression time to generate a bitstream specifically structured for modern, wide-issue execution pipelines (maximizing Instruction Level Parallelism). Performance (Verified via lzbench integration): ZXC was merged into the official lzbench repository monday. ARM64 (Apple…
ZXC – Asymmetric, +40% decode vs. LZ4 on ARM (C, BSD-3, Fuzzed) launched on December 17, 2025 with 28 votes, #516 of 11,628 launches that month and more than 90% of that year's launches.
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…
Does a similar job
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