author | Gregory Szorc <gregory.szorc@gmail.com> |
Mon, 08 Oct 2018 16:27:40 -0700 | |
changeset 40121 | 73fef626dae3 |
parent 37495 | b1fb341d8a61 |
child 42070 | 675775c33ab6 |
permissions | -rw-r--r-- |
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=============== |
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Version History |
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=============== |
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1.0.0 (not yet released) |
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======================== |
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Actions Blocking Release |
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------------------------ |
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* compression and decompression APIs that support ``io.rawIOBase`` interface |
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(#13). |
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* Refactor module names so C and CFFI extensions live under ``zstandard`` |
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package. |
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* Overall API design review. |
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* Use Python allocator where possible. |
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* Figure out what to do about experimental APIs not implemented by CFFI. |
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* APIs for auto adjusting compression parameters based on input size. e.g. |
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clamping the window log so it isn't too large for input. |
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* Consider allowing compressor and decompressor instances to be thread safe, |
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support concurrent operations. Or track when an operation is in progress and |
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refuse to let concurrent operations use the same instance. |
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* Support for magic-less frames for all decompression operations (``decompress()`` |
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doesn't work due to sniffing the content size and the lack of a ZSTD API to |
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sniff magic-less frames - this should be fixed in 1.3.5.). |
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* Audit for complete flushing when ending compression streams. |
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* Deprecate legacy APIs. |
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* Audit for ability to control read/write sizes on all APIs. |
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* Detect memory leaks via bench.py. |
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* Remove low-level compression parameters from ``ZstdCompressor.__init__`` and |
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require use of ``CompressionParameters``. |
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* Expose ``ZSTD_getFrameProgression()`` from more compressor types. |
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* Support modifying compression parameters mid operation when supported by |
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zstd API. |
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* Expose ``ZSTD_CLEVEL_DEFAULT`` constant. |
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* Support ``ZSTD_p_forceAttachDict`` compression parameter. |
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* Use ``ZSTD_CCtx_getParameter()``/``ZSTD_CCtxParam_getParameter()`` for retrieving |
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compression parameters. |
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* Consider exposing ``ZSTDMT_toFlushNow()``. |
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* Expose ``ZDICT_trainFromBuffer_fastCover()``, |
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``ZDICT_optimizeTrainFromBuffer_fastCover``. |
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* Expose and enforce ``ZSTD_minCLevel()`` for minimum compression level. |
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* Consider a ``chunker()`` API for decompression. |
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* Consider stats for ``chunker()`` API, including finding the last consumed |
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offset of input data. |
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Other Actions Not Blocking Release |
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--------------------------------------- |
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* Support for block compression APIs. |
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* API for ensuring max memory ceiling isn't exceeded. |
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* Move off nose for testing. |
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0.10.1 (released 2018-10-08) |
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============================ |
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Backwards Compatibility Notes |
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----------------------------- |
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* ``ZstdCompressor.stream_reader().closed`` is now a property instead of a |
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method (#58). |
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* ``ZstdDecompressor.stream_reader().closed`` is now a property instead of a |
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method (#58). |
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Changes |
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------- |
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* Stop attempting to package Python 3.6 for Miniconda. The latest version of |
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Miniconda is using Python 3.7. The Python 3.6 Miniconda packages were a lie |
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since this were built against Python 3.7. |
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* ``ZstdCompressor.stream_reader()``'s and ``ZstdDecompressor.stream_reader()``'s |
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``closed`` attribute is now a read-only property instead of a method. This now |
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properly matches the ``IOBase`` API and allows instances to be used in more |
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places that accept ``IOBase`` instances. |
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0.10.0 (released 2018-10-08) |
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============================ |
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Backwards Compatibility Notes |
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----------------------------- |
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* ``ZstdDecompressor.stream_reader().read()`` now consistently requires an |
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argument in both the C and CFFI backends. Before, the CFFI implementation |
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would assume a default value of ``-1``, which was later rejected. |
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* The ``compress_literals`` argument and attribute has been removed from |
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``zstd.ZstdCompressionParameters`` because it was removed by the zstd 1.3.5 |
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API. |
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* ``ZSTD_CCtx_setParametersUsingCCtxParams()`` is no longer called on every |
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operation performed against ``ZstdCompressor`` instances. The reason for this |
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change is that the zstd 1.3.5 API no longer allows this without calling |
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``ZSTD_CCtx_resetParameters()`` first. But if we called |
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``ZSTD_CCtx_resetParameters()`` on every operation, we'd have to redo |
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potentially expensive setup when using dictionaries. We now call |
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``ZSTD_CCtx_reset()`` on every operation and don't attempt to change |
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compression parameters. |
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* Objects returned by ``ZstdCompressor.stream_reader()`` no longer need to be |
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used as a context manager. The context manager interface still exists and its |
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behavior is unchanged. |
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* Objects returned by ``ZstdDecompressor.stream_reader()`` no longer need to be |
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used as a context manager. The context manager interface still exists and its |
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behavior is unchanged. |
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Bug Fixes |
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104 |
--------- |
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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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* ``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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New Features |
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125 |
------------ |
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126 |
|
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* New module constants ``BLOCKSIZELOG_MAX``, ``BLOCKSIZE_MAX``, |
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``TARGETLENGTH_MAX`` that expose constants from libzstd. |
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* New ``ZstdCompressor.chunker()`` API for manually feeding data into a |
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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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|
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* Bundled zstandard library upgraded from 1.1.3 to 1.3.4. This delivers various |
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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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|
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* 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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zstd: vendor python-zstandard 0.8.1
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parents:
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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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diff
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|
318 |
* CompressionParameters now has a estimated_compression_context_size() method. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
319 |
zstd.estimate_compression_context_size() is now deprecated and slated for |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
320 |
removal. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
321 |
* Implemented a lot of fuzzing tests. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
322 |
* CompressionParameters instances now perform extra validation by calling |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
323 |
ZSTD_checkCParams() at construction time. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
324 |
* multi_compress_to_buffer() API for compressing multiple inputs as a |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
325 |
single operation, as efficiently as possible. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
326 |
* ZSTD_CStream instances are now used across multiple operations on |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
327 |
ZstdCompressor instances, resulting in much better performance for |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
328 |
APIs that do streaming. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
329 |
* ZSTD_DStream instances are now used across multiple operations on |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
330 |
ZstdDecompressor instances, resulting in much better performance for |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
331 |
APIs that do streaming. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
332 |
* train_dictionary() now releases the GIL. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
333 |
* Support for training dictionaries using the COVER algorithm. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
334 |
* multi_decompress_to_buffer() API for decompressing multiple frames as a |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
335 |
single operation, as efficiently as possible. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
336 |
* Support for multi-threaded compression. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
337 |
* Disable deprecation warnings when compiling CFFI module. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
338 |
* Fixed memory leak in train_dictionary(). |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
339 |
* Removed DictParameters type. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
340 |
* train_dictionary() now accepts keyword arguments instead of a |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
341 |
DictParameters instance to control dictionary generation. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
342 |
|
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zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
343 |
0.7.0 (released 2017-02-07) |
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parents:
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|
344 |
=========================== |
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parents:
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|
345 |
|
c32454d69b85
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
346 |
* Added zstd.get_frame_parameters() to obtain info about a zstd frame. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
347 |
* Added ZstdDecompressor.decompress_content_dict_chain() for efficient |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
348 |
decompression of *content-only dictionary chains*. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
349 |
* CFFI module fully implemented; all tests run against both C extension and |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
350 |
CFFI implementation. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
351 |
* Vendored version of zstd updated to 1.1.3. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
352 |
* Use ZstdDecompressor.decompress() now uses ZSTD_createDDict_byReference() |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
353 |
to avoid extra memory allocation of dict data. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
354 |
* Add function names to error messages (by using ":name" in PyArg_Parse* |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
355 |
functions). |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
356 |
* Reuse decompression context across operations. Previously, we created a |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
357 |
new ZSTD_DCtx for each decompress(). This was measured to slow down |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
358 |
decompression by 40-200MB/s. The API guarantees say ZstdDecompressor |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
359 |
is not thread safe. So we reuse the ZSTD_DCtx across operations and make |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
360 |
things faster in the process. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
361 |
* ZstdCompressor.write_to()'s compress() and flush() methods now return number |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
362 |
of bytes written. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
363 |
* ZstdDecompressor.write_to()'s write() method now returns the number of bytes |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
364 |
written to the underlying output object. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
365 |
* CompressionParameters instances now expose their values as attributes. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30822
diff
changeset
|
366 |
* CompressionParameters instances no longer are subscriptable nor behave |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
367 |
as tuples (backwards incompatible). Use attributes to obtain values. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
368 |
* DictParameters instances now expose their values as attributes. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
369 |
|
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zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
370 |
0.6.0 (released 2017-01-14) |
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b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
371 |
=========================== |
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parents:
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changeset
|
372 |
|
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
373 |
* Support for legacy zstd protocols (build time opt in feature). |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
374 |
* Automation improvements to test against Python 3.6, latest versions |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
375 |
of Tox, more deterministic AppVeyor behavior. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
376 |
* CFFI "parser" improved to use a compiler preprocessor instead of rewriting |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
377 |
source code manually. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
378 |
* Vendored version of zstd updated to 1.1.2. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
379 |
* Documentation improvements. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
380 |
* Introduce a bench.py script for performing (crude) benchmarks. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
381 |
* ZSTD_CCtx instances are now reused across multiple compress() operations. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
382 |
* ZstdCompressor.write_to() now has a flush() method. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
383 |
* ZstdCompressor.compressobj()'s flush() method now accepts an argument to |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
384 |
flush a block (as opposed to ending the stream). |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
385 |
* Disallow compress(b'') when writing content sizes by default (issue #11). |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
386 |
|
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
387 |
0.5.2 (released 2016-11-12) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31847
diff
changeset
|
388 |
=========================== |
30822
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zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
389 |
|
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
390 |
* more packaging fixes for source distribution |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
391 |
|
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
392 |
0.5.1 (released 2016-11-12) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31847
diff
changeset
|
393 |
=========================== |
30822
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zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
394 |
|
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
395 |
* setup_zstd.py is included in the source distribution |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
396 |
|
30435
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
397 |
0.5.0 (released 2016-11-10) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31847
diff
changeset
|
398 |
=========================== |
30435
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
399 |
|
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
400 |
* Vendored version of zstd updated to 1.1.1. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
401 |
* Continuous integration for Python 3.6 and 3.7 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
402 |
* Continuous integration for Conda |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
403 |
* Added compression and decompression APIs providing similar interfaces |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
404 |
to the standard library ``zlib`` and ``bz2`` modules. This allows |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
405 |
coding to a common interface. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
406 |
* ``zstd.__version__` is now defined. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
407 |
* ``read_from()`` on various APIs now accepts objects implementing the buffer |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
408 |
protocol. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
409 |
* ``read_from()`` has gained a ``skip_bytes`` argument. This allows callers |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
410 |
to pass in an existing buffer with a header without having to create a |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
411 |
slice or a new object. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
412 |
* Implemented ``ZstdCompressionDict.as_bytes()``. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
413 |
* Python's memory allocator is now used instead of ``malloc()``. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
414 |
* Low-level zstd data structures are reused in more instances, cutting down |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
415 |
on overhead for certain operations. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
416 |
* ``distutils`` boilerplate for obtaining an ``Extension`` instance |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
417 |
has now been refactored into a standalone ``setup_zstd.py`` file. This |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
418 |
allows other projects with ``setup.py`` files to reuse the |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
419 |
``distutils`` code for this project without copying code. |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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420 |
* The monolithic ``zstd.c`` file has been split into a header file defining |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
421 |
types and separate ``.c`` source files for the implementation. |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
422 |
|
37495
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
31847
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423 |
Older History |
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31847
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424 |
============= |
30435
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Gregory Szorc <gregory.szorc@gmail.com>
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|
425 |
|
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
426 |
2016-08-31 - Zstandard 1.0.0 is released and Gregory starts hacking on a |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
427 |
Python extension for use by the Mercurial project. A very hacky prototype |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
428 |
is sent to the mercurial-devel list for RFC. |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
429 |
|
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
430 |
2016-09-03 - Most functionality from Zstandard C API implemented. Source |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
431 |
code published on https://github.com/indygreg/python-zstandard. Travis-CI |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
432 |
automation configured. 0.0.1 release on PyPI. |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
433 |
|
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
434 |
2016-09-05 - After the API was rounded out a bit and support for Python |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
435 |
2.6 and 2.7 was added, version 0.1 was released to PyPI. |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
436 |
|
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
437 |
2016-09-05 - After the compressor and decompressor APIs were changed, 0.2 |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
438 |
was released to PyPI. |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
439 |
|
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
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>
parents:
diff
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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
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
442 |
be declared when performing streaming compression. ZstdDecompressor.decompress() |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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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>
parents:
diff
changeset
|
444 |
compression and decompression APIs. Memory size APIs added. |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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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>
parents:
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|
446 |
implemented. This rounds out the major compression/decompression APIs planned |
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parents:
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|
447 |
by the author. |
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parents:
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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>
parents:
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|
450 |
decoding a zstd frame (issue #2). |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
451 |
|
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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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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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
453 |
write buffer sizes, and a few bug fixes involving failure to read/write |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
454 |
all data when buffer sizes were too small to hold remaining data. |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
455 |
|
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
456 |
2016-11-10 - 0.5.0 is released with zstd 1.1.1 and other enhancements. |