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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file.

0.16.1 (August 4, 2024)

  • Compatibility with Python 3.13

0.16.0 (May 20, 2024)

  • Upgrade zstd source code from v1.5.5 to v1.5.6
  • Fix pyzstd_pep517 parameter name in get_requires_for_build_wheel
  • Deprecate support for Python version before 3.8 and stop building wheels for them
  • Minor fixes in type hints
  • Refactor README & CHANGELOG files

0.15.10 (Mar 24, 2024)

  • Fix SeekableZstdFile class can't open new file in appending mode.
  • Support sub-interpreter on CPython 3.12+, can utilize per-interpreter GIL.
  • On CPython(3.5~3.12)+Linux, use another output buffer code that can utilize the mremap mechanism.
  • Change repository URL and maintainer following the deletion of the GitHub account of the original author, Ma Lin (animalize). See #1.

0.15.9 (Jun 24, 2023)

ZstdFile class related changes:

  • Add SeekableZstdFile class, it's a subclass of ZstdFile, supports Zstandard Seekable Format.
  • Add mode argument to ZstdFile.flush() method, now it can flush a zstd frame.
  • Add read_size and write_size arguments to ZstdFile.__init__() method, can work with Network File Systems better.
  • Optimize ZstdFile performance to C language level.

0.15.7 (Apr 21, 2023)

ZstdDict class changes:

  • Fix these advanced compression parameters may be ignored when loading a dictionary: windowLog, hashLog, chainLog, searchLog, minMatch, targetLength, strategy, enableLongDistanceMatching, ldmHashLog, ldmMinMatch, ldmBucketSizeLog, ldmHashRateLog, and some non-public parameters.
  • When compressing, load undigested dictionary instead of digested dictionary by default. Loading again an undigested is slower, see differences.
  • Add .as_prefix attribute. Can use zstd as a patching engine.

0.15.6 (Apr 5, 2023)

  • Upgrade zstd source code from v1.5.4 to v1.5.5.

0.15.4 (Feb 24, 2023)

  • Upgrade zstd source code from v1.5.2 to v1.5.4. v1.5.3 is a non-public release.
  • Support pyproject.toml build mechanism (PEP-517). Note that specifying build options in old way may be invalid, see build commands.
  • Support "multi-phase initialization" (PEP-489) on CPython 3.11+, can work with CPython sub-interpreters in the future. Currently this build option is disabled by default.
  • Add a command line interface (CLI).

0.15.3 (Aug 3, 2022)

  • Fix ZstdError object can't be pickled.

0.15.2 (Jan 22, 2022)

  • Upgrade zstd source code from v1.5.1 to v1.5.2.

0.15.1 (Dec 25, 2021)

  • Upgrade zstd source code from v1.5.0 to v1.5.1.
  • Fix ZstdFile.write() / train_dict() / finalize_dict() may use wrong length for some buffer protocol objects.
  • Two behavior changes:
    • Setting CParameter.nbWorkers to 1 now means "1-thread multi-threaded mode", rather than "single-threaded mode".
    • If the underlying zstd library doesn't support multi-threaded compression, no longer automatically fallback to "single-threaded mode", now raise a ZstdError exception.
  • Add a module level variable zstd_support_multithread.
  • Add a setup.py option --avx2, see build options.

0.15.0 (May 18, 2021)

  • Upgrade zstd source code from v1.4.9 to v1.5.0.
  • Some improvements, no API changes.

0.14.4 (Mar 24, 2021)

  • Add a CFFI implementation that can work with PyPy.
  • Allow dynamically link to zstd library.

0.14.3 (Mar 4, 2021)

  • Upgrade zstd source code from v1.4.8 to v1.4.9.

0.14.2 (Feb 24, 2021)

0.14.1 (Dec 19, 2020)

  • Upgrade zstd source code from v1.4.5 to v1.4.8.
    • v1.4.6 is a non-public release for Linux kernel.
    • v1.4.8 is a hotfix for v1.4.7.
  • Some improvements, no API changes.

0.13.0 (Nov 7, 2020)

  • ZstdDecompressor class: now it has the same API and behavior as BZ2Decompressor / LZMADecompressor classes in Python standard library, it stops after a frame is decompressed.
  • Add an EndlessZstdDecompressor class, it accepts multiple concatenated frames. It is renamed from previous ZstdDecompressor class, but .at_frame_edge is True when both the input and output streams are at a frame edge.
  • Rename zstd_open() function to open(), consistent with Python standard library.
  • decompress() function:
    • ~9% faster when: there is one frame, and the decompressed size was recorded in frame header.
    • raises ZstdError when input or output data is not at a frame edge. Previously, it only raise for output data is not at a frame edge.

0.12.5 (Oct 12, 2020)

  • No longer use Argument Clinic, now supports Python 3.5+, previously 3.7+.

0.12.4 (Oct 7, 2020)

  • It seems the API is stable.

0.2.4 (Sep 2, 2020)

  • The first version upload to PyPI.
  • Includes zstd v1.4.5 source code.