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

--- 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)
 ---------------------------