mirror of https://github.com/google/snappy.git
118 lines
3.5 KiB
Plaintext
118 lines
3.5 KiB
Plaintext
Snappy v1.1.1, October 15th 2013:
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* Add support for uncompressing to iovecs (scatter I/O).
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The bulk of this patch was contributed by Mohit Aron.
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* Speed up decompression by ~2%; much more so (~13-20%) on
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a few benchmarks on given compilers and CPUs.
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* Fix a few issues with MSVC compilation.
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* Support truncated test data in the benchmark.
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Snappy v1.1.0, January 18th 2013:
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* Snappy now uses 64 kB block size instead of 32 kB. On average,
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this means it compresses about 3% denser (more so for some
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inputs), at the same or better speeds.
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* libsnappy no longer depends on iostream.
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* Some small performance improvements in compression on x86
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(0.5–1%).
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* Various portability fixes for ARM-based platforms, for MSVC,
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and for GNU/Hurd.
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Snappy v1.0.5, February 24th 2012:
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* More speed improvements. Exactly how big will depend on
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the architecture:
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- 3–10% faster decompression for the base case (x86-64).
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- ARMv7 and higher can now use unaligned accesses,
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and will see about 30% faster decompression and
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20–40% faster compression.
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- 32-bit platforms (ARM and 32-bit x86) will see 2–5%
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faster compression.
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These are all cumulative (e.g., ARM gets all three speedups).
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* Fixed an issue where the unit test would crash on system
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with less than 256 MB address space available,
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e.g. some embedded platforms.
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* Added a framing format description, for use over e.g. HTTP,
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or for a command-line compressor. We do not have any
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implementations of this at the current point, but there seems
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to be enough of a general interest in the topic.
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Also make the format description slightly clearer.
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* Remove some compile-time warnings in -Wall
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(mostly signed/unsigned comparisons), for easier embedding
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into projects that use -Wall -Werror.
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Snappy v1.0.4, September 15th 2011:
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* Speeded up the decompressor somewhat; typically about 2–8%
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for Core i7, in 64-bit mode (comparable for Opteron).
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Somewhat more for some tests, almost no gain for others.
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* Make Snappy compile on certain platforms it didn't before
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(Solaris with SunPro C++, HP-UX, AIX).
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* Correct some minor errors in the format description.
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Snappy v1.0.3, June 2nd 2011:
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* Speeded up the decompressor somewhat; about 3-6% for Core 2,
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6-13% for Core i7, and 5-12% for Opteron (all in 64-bit mode).
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* Added compressed format documentation. This text is new,
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but an earlier version from Zeev Tarantov was used as reference.
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* Only link snappy_unittest against -lz and other autodetected
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libraries, not libsnappy.so (which doesn't need any such dependency).
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* Fixed some display issues in the microbenchmarks, one of which would
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frequently make the test crash on GNU/Hurd.
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Snappy v1.0.2, April 29th 2011:
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* Relicense to a BSD-type license.
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* Added C bindings, contributed by Martin Gieseking.
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* More Win32 fixes, in particular for MSVC.
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* Replace geo.protodata with a newer version.
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* Fix timing inaccuracies in the unit test when comparing Snappy
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to other algorithms.
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Snappy v1.0.1, March 25th 2011:
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This is a maintenance release, mostly containing minor fixes.
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There is no new functionality. The most important fixes include:
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* The COPYING file and all licensing headers now correctly state that
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Snappy is licensed under the Apache 2.0 license.
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* snappy_unittest should now compile natively under Windows,
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as well as on embedded systems with no mmap().
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* Various autotools nits have been fixed.
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Snappy v1.0, March 17th 2011:
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* Initial version.
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