Mercurial > hg
diff contrib/python-zstandard/NEWS.rst @ 31796:e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Commit 81e1f5bbf1fc54808649562d3ed829730765c540 from
https://github.com/indygreg/python-zstandard is imported without
modifications (other than removing unwanted files).
Updates relevant to Mercurial include:
* Support for multi-threaded compression (we can use this for
bundle and wire protocol compression).
* APIs for batch compression and decompression operations using
multiple threads and optimal memory allocation mechanism. (Can
be useful for revlog perf improvements.)
* A ``BufferWithSegments`` type that models a single memory buffer
containing N discrete items of known lengths. This type can be
used for very efficient 0-copy data operations.
# no-check-commit
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sat, 01 Apr 2017 15:24:03 -0700 |
parents | c32454d69b85 |
children | 39d36c2db68e |
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line diff
--- a/contrib/python-zstandard/NEWS.rst Sat Apr 01 13:43:52 2017 -0700 +++ b/contrib/python-zstandard/NEWS.rst Sat Apr 01 15:24:03 2017 -0700 @@ -1,6 +1,34 @@ Version History =============== +0.8.0 (released 2017-03-08) +--------------------------- + +* CompressionParameters now has a estimated_compression_context_size() method. + zstd.estimate_compression_context_size() is now deprecated and slated for + removal. +* Implemented a lot of fuzzing tests. +* CompressionParameters instances now perform extra validation by calling + ZSTD_checkCParams() at construction time. +* multi_compress_to_buffer() API for compressing multiple inputs as a + single operation, as efficiently as possible. +* ZSTD_CStream instances are now used across multiple operations on + ZstdCompressor instances, resulting in much better performance for + APIs that do streaming. +* ZSTD_DStream instances are now used across multiple operations on + ZstdDecompressor instances, resulting in much better performance for + APIs that do streaming. +* train_dictionary() now releases the GIL. +* Support for training dictionaries using the COVER algorithm. +* multi_decompress_to_buffer() API for decompressing multiple frames as a + single operation, as efficiently as possible. +* Support for multi-threaded compression. +* Disable deprecation warnings when compiling CFFI module. +* Fixed memory leak in train_dictionary(). +* Removed DictParameters type. +* train_dictionary() now accepts keyword arguments instead of a + DictParameters instance to control dictionary generation. + 0.7.0 (released 2017-02-07) ---------------------------