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    facebook/zstd

    #217 this week

    Zstandard - Fast real-time compression algorithm

    developer-tools
    C
    NOASSERTION
    28.0K stars
    2.6K forks
    28.0K GitHub watchers
    Updated Oct 10, 2026
    View on GitHub

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    Where it stands

    Rank, growth pace and release cadence relative to everything GStars tracks.

    Ranks #217 of 1,950 repositories GStars tracks this week (top 11%).

    No releases in the last 90 days; the most recent was 598 days ago, with 355 contributors on GitHub.

    Peaked at #92 in the weekly ranking the week of Sep 6, its best in the past year.

    Use Cases & Benefits

    • Implements a fast, real-time lossless compression algorithm with configurable speed and compression ratio trade-offs.
    • Delivers high compression and decompression speeds while maintaining a stable, documented format and supporting dictionary training for small data.
    • Use for compressing large-scale data streams in cloud infrastructure requiring efficient real-time processing.
    • Use for improving compression ratios on small, repetitive datasets by training and applying custom dictionaries.
    • Use for integrating a high-performance C compression library into cross-platform applications via multiple build systems and language bindings.

    Should you depend on it?

    License terms, project hygiene and risks, from GitHub metadata and GStars' snapshots.

    License

    Other

    GitHub could not identify this license; read the LICENSE file before depending on it.

    Community files

    • README: present
    • Contributing guide: present
    • Code of conduct: present

    Watch-outs

    • License not identified by GitHub; read the LICENSE file before depending on it.

    General guidance from repository metadata, not legal advice. How we score

    From the README

    Zstandard, or zstd as short version, is a fast lossless compression algorithm, targeting real-time compression scenarios at zlib-level and better compression ratios. It's backed by a very fast entropy stage, provided by Huff0 and FSE library.

    Zstandard's format is stable and documented in RFC8878. Multiple independent implementations are already available. This repository represents the reference implementation, provided as an open-source dual BSD OR GPLv2 licensed C library, and a command line utility producing and decoding .zst, .gz, .xz and .lz4 files. Should your project require another programming language, a list of known ports and bindings is provided on Zstandard homepage.

    For reference, several fast compression algorithms were tested and compared on a desktop featuring a Core i7-9700K CPU @ 4.9GHz and running Ubuntu 24.04 (Linux 6.8.0-53-generic), using lzbench, an open-source in-memory benchmark by @inikep compiled with gcc 14.2.0, on the Silesia compression corpus.

    The negative compression levels, specified with --fast=#, offer faster compression and decompression speed at the cost of compression ratio.

    Excerpt from the facebook/zstd README on GitHub (NOASSERTION license). © its authors.Read the full README on GitHub

    Daily snapshots

    Stars gained per day, and how forks and open issues moved, from GStars' daily snapshots

    Sep 9: +27

    +259 stars over 33 days across 4 snapshot days; best day +27 on Sep 9.

    Forks

    2.6K+40

    Open issues

    407+39

    Compared with peers in Developer Tools

    Fastest-growing repositories GStars tracks in this cohort for the week of Oct 11, by 7-day star growth

    View category →
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    facebook/zstd28.0K+075598 days ago
    Category median81.8K+1.3K75—
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