Mercurial > hg
annotate contrib/python-zstandard/NEWS.rst @ 40121:73fef626dae3
zstandard: vendor python-zstandard 0.10.1
This was just released.
The upstream source distribution from PyPI was extracted. Unwanted
files were removed.
The clang-format ignore list was updated to reflect the new source
of files.
setup.py was updated to pass a new argument to python-zstandard's
function for returning an Extension instance. Upstream had to change
to use relative paths because Python 3.7's packaging doesn't
seem to like absolute paths when defining sources, includes, etc.
The default relative path calculation is relative to setup_zstd.py
which is different from the directory of Mercurial's setup.py.
The project contains a vendored copy of zstandard 1.3.6. The old
version was 1.3.4.
The API should be backwards compatible and nothing in core should
need adjusted. However, there is a new "chunker" API that we
may find useful in places where we want to emit compressed chunks
of a fixed size.
There are a pair of bug fixes in 0.10.0 with regards to
compressobj() and decompressobj() when block flushing is used. I
actually found these bugs when introducing these APIs in Mercurial!
But existing Mercurial code is not affected because we don't
perform block flushing.
# no-check-commit because 3rd party code has different style guidelines
Differential Revision: https://phab.mercurial-scm.org/D4911
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Mon, 08 Oct 2018 16:27:40 -0700 |
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1 =============== |
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2 Version History |
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3 =============== |
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4 |
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5 1.0.0 (not yet released) |
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6 ======================== |
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7 |
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8 Actions Blocking Release |
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9 ------------------------ |
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10 |
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11 * compression and decompression APIs that support ``io.rawIOBase`` interface |
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12 (#13). |
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13 * Refactor module names so C and CFFI extensions live under ``zstandard`` |
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14 package. |
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15 * Overall API design review. |
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16 * Use Python allocator where possible. |
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17 * Figure out what to do about experimental APIs not implemented by CFFI. |
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18 * APIs for auto adjusting compression parameters based on input size. e.g. |
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19 clamping the window log so it isn't too large for input. |
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20 * Consider allowing compressor and decompressor instances to be thread safe, |
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21 support concurrent operations. Or track when an operation is in progress and |
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22 refuse to let concurrent operations use the same instance. |
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23 * Support for magic-less frames for all decompression operations (``decompress()`` |
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24 doesn't work due to sniffing the content size and the lack of a ZSTD API to |
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25 sniff magic-less frames - this should be fixed in 1.3.5.). |
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26 * Audit for complete flushing when ending compression streams. |
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27 * Deprecate legacy APIs. |
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28 * Audit for ability to control read/write sizes on all APIs. |
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29 * Detect memory leaks via bench.py. |
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30 * Remove low-level compression parameters from ``ZstdCompressor.__init__`` and |
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31 require use of ``CompressionParameters``. |
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32 * Expose ``ZSTD_getFrameProgression()`` from more compressor types. |
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33 * Support modifying compression parameters mid operation when supported by |
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34 zstd API. |
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35 * Expose ``ZSTD_CLEVEL_DEFAULT`` constant. |
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36 * Support ``ZSTD_p_forceAttachDict`` compression parameter. |
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37 * Use ``ZSTD_CCtx_getParameter()``/``ZSTD_CCtxParam_getParameter()`` for retrieving |
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38 compression parameters. |
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39 * Consider exposing ``ZSTDMT_toFlushNow()``. |
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40 * Expose ``ZDICT_trainFromBuffer_fastCover()``, |
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41 ``ZDICT_optimizeTrainFromBuffer_fastCover``. |
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42 * Expose and enforce ``ZSTD_minCLevel()`` for minimum compression level. |
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43 * Consider a ``chunker()`` API for decompression. |
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44 * Consider stats for ``chunker()`` API, including finding the last consumed |
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45 offset of input data. |
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46 |
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47 Other Actions Not Blocking Release |
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48 --------------------------------------- |
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49 |
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50 * Support for block compression APIs. |
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51 * API for ensuring max memory ceiling isn't exceeded. |
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52 * Move off nose for testing. |
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53 |
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54 0.10.1 (released 2018-10-08) |
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55 ============================ |
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56 |
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57 Backwards Compatibility Notes |
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58 ----------------------------- |
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59 |
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60 * ``ZstdCompressor.stream_reader().closed`` is now a property instead of a |
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61 method (#58). |
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62 * ``ZstdDecompressor.stream_reader().closed`` is now a property instead of a |
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63 method (#58). |
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64 |
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65 Changes |
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66 ------- |
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67 |
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68 * Stop attempting to package Python 3.6 for Miniconda. The latest version of |
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69 Miniconda is using Python 3.7. The Python 3.6 Miniconda packages were a lie |
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70 since this were built against Python 3.7. |
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71 * ``ZstdCompressor.stream_reader()``'s and ``ZstdDecompressor.stream_reader()``'s |
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72 ``closed`` attribute is now a read-only property instead of a method. This now |
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73 properly matches the ``IOBase`` API and allows instances to be used in more |
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74 places that accept ``IOBase`` instances. |
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75 |
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76 0.10.0 (released 2018-10-08) |
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77 ============================ |
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78 |
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79 Backwards Compatibility Notes |
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80 ----------------------------- |
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81 |
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82 * ``ZstdDecompressor.stream_reader().read()`` now consistently requires an |
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83 argument in both the C and CFFI backends. Before, the CFFI implementation |
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84 would assume a default value of ``-1``, which was later rejected. |
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85 * The ``compress_literals`` argument and attribute has been removed from |
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86 ``zstd.ZstdCompressionParameters`` because it was removed by the zstd 1.3.5 |
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87 API. |
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88 * ``ZSTD_CCtx_setParametersUsingCCtxParams()`` is no longer called on every |
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89 operation performed against ``ZstdCompressor`` instances. The reason for this |
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90 change is that the zstd 1.3.5 API no longer allows this without calling |
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91 ``ZSTD_CCtx_resetParameters()`` first. But if we called |
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92 ``ZSTD_CCtx_resetParameters()`` on every operation, we'd have to redo |
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93 potentially expensive setup when using dictionaries. We now call |
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94 ``ZSTD_CCtx_reset()`` on every operation and don't attempt to change |
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95 compression parameters. |
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96 * Objects returned by ``ZstdCompressor.stream_reader()`` no longer need to be |
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97 used as a context manager. The context manager interface still exists and its |
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98 behavior is unchanged. |
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99 * Objects returned by ``ZstdDecompressor.stream_reader()`` no longer need to be |
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100 used as a context manager. The context manager interface still exists and its |
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101 behavior is unchanged. |
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102 |
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103 Bug Fixes |
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104 --------- |
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105 |
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106 * ``ZstdDecompressor.decompressobj().decompress()`` should now return all data |
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107 from internal buffers in more scenarios. Before, it was possible for data to |
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108 remain in internal buffers. This data would be emitted on a subsequent call |
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109 to ``decompress()``. The overall output stream would still be valid. But if |
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110 callers were expecting input data to exactly map to output data (say the |
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111 producer had used ``flush(COMPRESSOBJ_FLUSH_BLOCK)`` and was attempting to |
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112 map input chunks to output chunks), then the previous behavior would be |
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113 wrong. The new behavior is such that output from |
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114 ``flush(COMPRESSOBJ_FLUSH_BLOCK)`` fed into ``decompressobj().decompress()`` |
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115 should produce all available compressed input. |
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116 * ``ZstdDecompressor.stream_reader().read()`` should no longer segfault after |
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117 a previous context manager resulted in error (#56). |
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118 * ``ZstdCompressor.compressobj().flush(COMPRESSOBJ_FLUSH_BLOCK)`` now returns |
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119 all data necessary to flush a block. Before, it was possible for the |
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120 ``flush()`` to not emit all data necessary to fully represent a block. This |
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121 would mean decompressors wouldn't be able to decompress all data that had been |
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122 fed into the compressor and ``flush()``ed. (#55). |
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123 |
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124 New Features |
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125 ------------ |
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126 |
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127 * New module constants ``BLOCKSIZELOG_MAX``, ``BLOCKSIZE_MAX``, |
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128 ``TARGETLENGTH_MAX`` that expose constants from libzstd. |
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129 * New ``ZstdCompressor.chunker()`` API for manually feeding data into a |
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130 compressor and emitting chunks of a fixed size. Like ``compressobj()``, the |
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131 API doesn't impose restrictions on the input or output types for the |
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132 data streams. Unlike ``compressobj()``, it ensures output chunks are of a |
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133 fixed size. This makes this API useful when the compressed output is being |
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134 fed into an I/O layer, where uniform write sizes are useful. |
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135 * ``ZstdCompressor.stream_reader()`` no longer needs to be used as a context |
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136 manager (#34). |
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137 * ``ZstdDecompressor.stream_reader()`` no longer needs to be used as a context |
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138 manager (#34). |
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139 * Bundled zstandard library upgraded from 1.3.4 to 1.3.6. |
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140 |
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141 Changes |
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142 ------- |
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143 |
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144 * Added ``zstd_cffi.py`` and ``NEWS.rst`` to ``MANIFEST.in``. |
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145 * ``zstandard.__version__`` is now defined (#50). |
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146 * Upgrade pip, setuptools, wheel, and cibuildwheel packages to latest versions. |
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147 * Upgrade various packages used in CI to latest versions. Notably tox (in |
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148 order to support Python 3.7). |
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149 * Use relative paths in setup.py to appease Python 3.7 (#51). |
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150 * Added CI for Python 3.7. |
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151 |
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152 0.9.1 (released 2018-06-04) |
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153 =========================== |
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154 |
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155 * Debian packaging support. |
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156 * Fix typo in setup.py (#44). |
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157 * Support building with mingw compiler (#46). |
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158 |
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159 0.9.0 (released 2018-04-08) |
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160 =========================== |
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161 |
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162 Backwards Compatibility Notes |
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163 ----------------------------- |
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164 |
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165 * CFFI 1.11 or newer is now required (previous requirement was 1.8). |
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166 * The primary module is now ``zstandard``. Please change imports of ``zstd`` |
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167 and ``zstd_cffi`` to ``import zstandard``. See the README for more. Support |
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168 for importing the old names will be dropped in the next release. |
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169 * ``ZstdCompressor.read_from()`` and ``ZstdDecompressor.read_from()`` have |
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170 been renamed to ``read_to_iter()``. ``read_from()`` is aliased to the new |
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171 name and will be deleted in a future release. |
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172 * Support for Python 2.6 has been removed. |
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173 * Support for Python 3.3 has been removed. |
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174 * The ``selectivity`` argument to ``train_dictionary()`` has been removed, as |
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175 the feature disappeared from zstd 1.3. |
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176 * Support for legacy dictionaries has been removed. Cover dictionaries are now |
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177 the default. ``train_cover_dictionary()`` has effectively been renamed to |
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178 ``train_dictionary()``. |
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179 * The ``allow_empty`` argument from ``ZstdCompressor.compress()`` has been |
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180 deleted and the method now allows empty inputs to be compressed by default. |
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181 * ``estimate_compression_context_size()`` has been removed. Use |
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182 ``CompressionParameters.estimated_compression_context_size()`` instead. |
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183 * ``get_compression_parameters()`` has been removed. Use |
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184 ``CompressionParameters.from_level()`` instead. |
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185 * The arguments to ``CompressionParameters.__init__()`` have changed. If you |
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186 were using positional arguments before, the positions now map to different |
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187 arguments. It is recommended to use keyword arguments to construct |
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188 ``CompressionParameters`` instances. |
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189 * ``TARGETLENGTH_MAX`` constant has been removed (it disappeared from zstandard |
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190 1.3.4). |
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191 * ``ZstdCompressor.write_to()`` and ``ZstdDecompressor.write_to()`` have been |
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192 renamed to ``ZstdCompressor.stream_writer()`` and |
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193 ``ZstdDecompressor.stream_writer()``, respectively. The old names are still |
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194 aliased, but will be removed in the next major release. |
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195 * Content sizes are written into frame headers by default |
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196 (``ZstdCompressor(write_content_size=True)`` is now the default). |
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197 * ``CompressionParameters`` has been renamed to ``ZstdCompressionParameters`` |
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198 for consistency with other types. The old name is an alias and will be removed |
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199 in the next major release. |
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200 |
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201 Bug Fixes |
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202 --------- |
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203 |
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204 * Fixed memory leak in ``ZstdCompressor.copy_stream()`` (#40) (from 0.8.2). |
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205 * Fixed memory leak in ``ZstdDecompressor.copy_stream()`` (#35) (from 0.8.2). |
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206 * Fixed memory leak of ``ZSTD_DDict`` instances in CFFI's ``ZstdDecompressor``. |
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207 |
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208 New Features |
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209 ------------ |
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210 |
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211 * Bundled zstandard library upgraded from 1.1.3 to 1.3.4. This delivers various |
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212 bug fixes and performance improvements. It also gives us access to newer |
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213 features. |
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214 * Support for negative compression levels. |
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215 * Support for *long distance matching* (facilitates compression ratios that approach |
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216 LZMA). |
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217 * Supporting for reading empty zstandard frames (with an embedded content size |
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218 of 0). |
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219 * Support for writing and partial support for reading zstandard frames without a |
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220 magic header. |
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221 * New ``stream_reader()`` API that exposes the ``io.RawIOBase`` interface (allows |
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222 you to ``.read()`` from a file-like object). |
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223 * Several minor features, bug fixes, and performance enhancements. |
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224 * Wheels for Linux and macOS are now provided with releases. |
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225 |
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226 Changes |
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227 ------- |
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228 |
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229 * Functions accepting bytes data now use the buffer protocol and can accept |
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230 more types (like ``memoryview`` and ``bytearray``) (#26). |
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231 * Add #includes so compilation on OS X and BSDs works (#20). |
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232 * New ``ZstdDecompressor.stream_reader()`` API to obtain a read-only i/o stream |
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233 of decompressed data for a source. |
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234 * New ``ZstdCompressor.stream_reader()`` API to obtain a read-only i/o stream of |
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235 compressed data for a source. |
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236 * Renamed ``ZstdDecompressor.read_from()`` to ``ZstdDecompressor.read_to_iter()``. |
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237 The old name is still available. |
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238 * Renamed ``ZstdCompressor.read_from()`` to ``ZstdCompressor.read_to_iter()``. |
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239 ``read_from()`` is still available at its old location. |
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240 * Introduce the ``zstandard`` module to import and re-export the C or CFFI |
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241 *backend* as appropriate. Behavior can be controlled via the |
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242 ``PYTHON_ZSTANDARD_IMPORT_POLICY`` environment variable. See README for |
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243 usage info. |
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244 * Vendored version of zstd upgraded to 1.3.4. |
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245 * Added module constants ``CONTENTSIZE_UNKNOWN`` and ``CONTENTSIZE_ERROR``. |
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246 * Add ``STRATEGY_BTULTRA`` compression strategy constant. |
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247 * Switch from deprecated ``ZSTD_getDecompressedSize()`` to |
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248 ``ZSTD_getFrameContentSize()`` replacement. |
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249 * ``ZstdCompressor.compress()`` can now compress empty inputs without requiring |
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250 special handling. |
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251 * ``ZstdCompressor`` and ``ZstdDecompressor`` now have a ``memory_size()`` |
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252 method for determining the current memory utilization of the underlying zstd |
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253 primitive. |
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254 * ``train_dictionary()`` has new arguments and functionality for trying multiple |
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255 variations of COVER parameters and selecting the best one. |
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256 * Added module constants ``LDM_MINMATCH_MIN``, ``LDM_MINMATCH_MAX``, and |
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257 ``LDM_BUCKETSIZELOG_MAX``. |
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258 * Converted all consumers to the zstandard *new advanced API*, which uses |
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259 ``ZSTD_compress_generic()`` |
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260 * ``CompressionParameters.__init__`` now accepts several more arguments, |
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261 including support for *long distance matching*. |
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262 * ``ZstdCompressionDict.__init__`` now accepts a ``dict_type`` argument that |
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263 controls how the dictionary should be interpreted. This can be used to |
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264 force the use of *content-only* dictionaries or to require the presence |
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265 of the dictionary magic header. |
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266 * ``ZstdCompressionDict.precompute_compress()`` can be used to precompute the |
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267 compression dictionary so it can efficiently be used with multiple |
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268 ``ZstdCompressor`` instances. |
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269 * Digested dictionaries are now stored in ``ZstdCompressionDict`` instances, |
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270 created automatically on first use, and automatically reused by all |
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271 ``ZstdDecompressor`` instances bound to that dictionary. |
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272 * All meaningful functions now accept keyword arguments. |
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273 * ``ZstdDecompressor.decompressobj()`` now accepts a ``write_size`` argument |
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274 to control how much work to perform on every decompressor invocation. |
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275 * ``ZstdCompressor.write_to()`` now exposes a ``tell()``, which exposes the |
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276 total number of bytes written so far. |
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277 * ``ZstdDecompressor.stream_reader()`` now supports ``seek()`` when moving |
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278 forward in the stream. |
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279 * Removed ``TARGETLENGTH_MAX`` constant. |
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280 * Added ``frame_header_size(data)`` function. |
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281 * Added ``frame_content_size(data)`` function. |
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282 * Consumers of ``ZSTD_decompress*`` have been switched to the new *advanced |
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283 decompression* API. |
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284 * ``ZstdCompressor`` and ``ZstdCompressionParams`` can now be constructed with |
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285 negative compression levels. |
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286 * ``ZstdDecompressor`` now accepts a ``max_window_size`` argument to limit the |
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287 amount of memory required for decompression operations. |
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288 * ``FORMAT_ZSTD1`` and ``FORMAT_ZSTD1_MAGICLESS`` constants to be used with |
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289 the ``format`` compression parameter to control whether the frame magic |
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290 header is written. |
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291 * ``ZstdDecompressor`` now accepts a ``format`` argument to control the |
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292 expected frame format. |
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293 * ``ZstdCompressor`` now has a ``frame_progression()`` method to return |
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294 information about the current compression operation. |
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295 * Error messages in CFFI no longer have ``b''`` literals. |
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296 * Compiler warnings and underlying overflow issues on 32-bit platforms have been |
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297 fixed. |
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298 * Builds in CI now build with compiler warnings as errors. This should hopefully |
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299 fix new compiler warnings from being introduced. |
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300 * Make ``ZstdCompressor(write_content_size=True)`` and |
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301 ``CompressionParameters(write_content_size=True)`` the default. |
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302 * ``CompressionParameters`` has been renamed to ``ZstdCompressionParameters``. |
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303 |
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304 0.8.2 (released 2018-02-22) |
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305 --------------------------- |
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306 |
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307 * Fixed memory leak in ``ZstdCompressor.copy_stream()`` (#40). |
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308 * Fixed memory leak in ``ZstdDecompressor.copy_stream()`` (#35). |
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309 |
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310 0.8.1 (released 2017-04-08) |
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311 --------------------------- |
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312 |
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313 * Add #includes so compilation on OS X and BSDs works (#20). |
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314 |
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315 0.8.0 (released 2017-03-08) |
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316 =========================== |
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317 |
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318 * CompressionParameters now has a estimated_compression_context_size() method. |
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319 zstd.estimate_compression_context_size() is now deprecated and slated for |
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320 removal. |
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321 * Implemented a lot of fuzzing tests. |
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322 * CompressionParameters instances now perform extra validation by calling |
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323 ZSTD_checkCParams() at construction time. |
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324 * multi_compress_to_buffer() API for compressing multiple inputs as a |
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325 single operation, as efficiently as possible. |
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326 * ZSTD_CStream instances are now used across multiple operations on |
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327 ZstdCompressor instances, resulting in much better performance for |
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328 APIs that do streaming. |
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329 * ZSTD_DStream instances are now used across multiple operations on |
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330 ZstdDecompressor instances, resulting in much better performance for |
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331 APIs that do streaming. |
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332 * train_dictionary() now releases the GIL. |
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333 * Support for training dictionaries using the COVER algorithm. |
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334 * multi_decompress_to_buffer() API for decompressing multiple frames as a |
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335 single operation, as efficiently as possible. |
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336 * Support for multi-threaded compression. |
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337 * Disable deprecation warnings when compiling CFFI module. |
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338 * Fixed memory leak in train_dictionary(). |
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339 * Removed DictParameters type. |
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340 * train_dictionary() now accepts keyword arguments instead of a |
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341 DictParameters instance to control dictionary generation. |
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342 |
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343 0.7.0 (released 2017-02-07) |
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344 =========================== |
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345 |
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346 * Added zstd.get_frame_parameters() to obtain info about a zstd frame. |
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347 * Added ZstdDecompressor.decompress_content_dict_chain() for efficient |
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348 decompression of *content-only dictionary chains*. |
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349 * CFFI module fully implemented; all tests run against both C extension and |
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350 CFFI implementation. |
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351 * Vendored version of zstd updated to 1.1.3. |
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352 * Use ZstdDecompressor.decompress() now uses ZSTD_createDDict_byReference() |
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353 to avoid extra memory allocation of dict data. |
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354 * Add function names to error messages (by using ":name" in PyArg_Parse* |
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355 functions). |
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356 * Reuse decompression context across operations. Previously, we created a |
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357 new ZSTD_DCtx for each decompress(). This was measured to slow down |
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358 decompression by 40-200MB/s. The API guarantees say ZstdDecompressor |
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359 is not thread safe. So we reuse the ZSTD_DCtx across operations and make |
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360 things faster in the process. |
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361 * ZstdCompressor.write_to()'s compress() and flush() methods now return number |
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362 of bytes written. |
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363 * ZstdDecompressor.write_to()'s write() method now returns the number of bytes |
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364 written to the underlying output object. |
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365 * CompressionParameters instances now expose their values as attributes. |
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366 * CompressionParameters instances no longer are subscriptable nor behave |
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367 as tuples (backwards incompatible). Use attributes to obtain values. |
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368 * DictParameters instances now expose their values as attributes. |
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369 |
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370 0.6.0 (released 2017-01-14) |
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371 =========================== |
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372 |
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373 * Support for legacy zstd protocols (build time opt in feature). |
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374 * Automation improvements to test against Python 3.6, latest versions |
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375 of Tox, more deterministic AppVeyor behavior. |
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376 * CFFI "parser" improved to use a compiler preprocessor instead of rewriting |
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377 source code manually. |
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378 * Vendored version of zstd updated to 1.1.2. |
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379 * Documentation improvements. |
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380 * Introduce a bench.py script for performing (crude) benchmarks. |
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381 * ZSTD_CCtx instances are now reused across multiple compress() operations. |
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382 * ZstdCompressor.write_to() now has a flush() method. |
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383 * ZstdCompressor.compressobj()'s flush() method now accepts an argument to |
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384 flush a block (as opposed to ending the stream). |
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385 * Disallow compress(b'') when writing content sizes by default (issue #11). |
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386 |
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387 0.5.2 (released 2016-11-12) |
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388 =========================== |
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389 |
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390 * more packaging fixes for source distribution |
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391 |
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392 0.5.1 (released 2016-11-12) |
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393 =========================== |
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394 |
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395 * setup_zstd.py is included in the source distribution |
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396 |
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397 0.5.0 (released 2016-11-10) |
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398 =========================== |
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399 |
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400 * Vendored version of zstd updated to 1.1.1. |
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401 * Continuous integration for Python 3.6 and 3.7 |
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402 * Continuous integration for Conda |
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403 * Added compression and decompression APIs providing similar interfaces |
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404 to the standard library ``zlib`` and ``bz2`` modules. This allows |
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405 coding to a common interface. |
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406 * ``zstd.__version__` is now defined. |
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407 * ``read_from()`` on various APIs now accepts objects implementing the buffer |
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408 protocol. |
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409 * ``read_from()`` has gained a ``skip_bytes`` argument. This allows callers |
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410 to pass in an existing buffer with a header without having to create a |
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411 slice or a new object. |
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412 * Implemented ``ZstdCompressionDict.as_bytes()``. |
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413 * Python's memory allocator is now used instead of ``malloc()``. |
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414 * Low-level zstd data structures are reused in more instances, cutting down |
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415 on overhead for certain operations. |
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416 * ``distutils`` boilerplate for obtaining an ``Extension`` instance |
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417 has now been refactored into a standalone ``setup_zstd.py`` file. This |
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418 allows other projects with ``setup.py`` files to reuse the |
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419 ``distutils`` code for this project without copying code. |
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420 * The monolithic ``zstd.c`` file has been split into a header file defining |
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421 types and separate ``.c`` source files for the implementation. |
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422 |
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423 Older History |
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424 ============= |
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425 |
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426 2016-08-31 - Zstandard 1.0.0 is released and Gregory starts hacking on a |
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427 Python extension for use by the Mercurial project. A very hacky prototype |
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428 is sent to the mercurial-devel list for RFC. |
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429 |
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430 2016-09-03 - Most functionality from Zstandard C API implemented. Source |
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431 code published on https://github.com/indygreg/python-zstandard. Travis-CI |
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432 automation configured. 0.0.1 release on PyPI. |
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433 |
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434 2016-09-05 - After the API was rounded out a bit and support for Python |
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435 2.6 and 2.7 was added, version 0.1 was released to PyPI. |
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436 |
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437 2016-09-05 - After the compressor and decompressor APIs were changed, 0.2 |
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Gregory Szorc <gregory.szorc@gmail.com>
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438 was released to PyPI. |
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Gregory Szorc <gregory.szorc@gmail.com>
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439 |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
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440 2016-09-10 - 0.3 is released with a bunch of new features. ZstdCompressor |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
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441 now accepts arguments controlling frame parameters. The source size can now |
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zstd: vendor python-zstandard 0.5.0
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442 be declared when performing streaming compression. ZstdDecompressor.decompress() |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
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443 is implemented. Compression dictionaries are now cached when using the simple |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
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444 compression and decompression APIs. Memory size APIs added. |
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445 ZstdCompressor.read_from() and ZstdDecompressor.read_from() have been |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
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446 implemented. This rounds out the major compression/decompression APIs planned |
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Gregory Szorc <gregory.szorc@gmail.com>
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447 by the author. |
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Gregory Szorc <gregory.szorc@gmail.com>
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448 |
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449 2016-10-02 - 0.3.3 is released with a bug fix for read_from not fully |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
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450 decoding a zstd frame (issue #2). |
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Gregory Szorc <gregory.szorc@gmail.com>
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451 |
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452 2016-10-02 - 0.4.0 is released with zstd 1.1.0, support for custom read and |
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Gregory Szorc <gregory.szorc@gmail.com>
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453 write buffer sizes, and a few bug fixes involving failure to read/write |
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454 all data when buffer sizes were too small to hold remaining data. |
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455 |
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456 2016-11-10 - 0.5.0 is released with zstd 1.1.1 and other enhancements. |