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Snappy v1.1.8, January 15th 2020: * Small performance improvements. * Removed snappy::string alias for std::string. * Improved CMake configuration. Snappy v1.1.7, August 24th 2017: * Improved CMake build support for 64-bit Linux distributions. * MSVC builds now use MSVC-specific intrinsics that map to clzll. * ARM64 (AArch64) builds use the code paths optimized for 64-bit processors. Snappy v1.1.6, July 12th 2017: This is a re-release of v1.1.5 with proper SONAME / SOVERSION values. Snappy v1.1.5, June 28th 2017: This release has broken SONAME / SOVERSION values. Users of snappy as a shared library should avoid 1.1.5 and use 1.1.6 instead. SONAME / SOVERSION errors will manifest as the dynamic library loader complaining that it cannot find snappy's shared library file (libsnappy.so / libsnappy.dylib), or that the library it found does not have the required version. 1.1.6 has the same code as 1.1.5, but carries build configuration fixes for the issues above. * Add CMake build support. The autoconf build support is now deprecated, and will be removed in the next release. * Add AppVeyor configuration, for Windows CI coverage. * Small performance improvement on little-endian PowerPC. * Small performance improvement on LLVM with position-independent executables. * Fix a few issues with various build environments. Snappy v1.1.4, January 25th 2017: * Fix a 1% performance regression when snappy is used in PIE executables. * Improve compression performance by 5%. * Improve decompression performance by 20%. Snappy v1.1.3, July 6th 2015: This is the first release to be done from GitHub, which means that some minor things like the ChangeLog format has changed (git log format instead of svn log). * Add support for Uncompress() from a Source to a Sink. * Various minor changes to improve MSVC support; in particular, the unit tests now compile and run under MSVC. Snappy v1.1.2, February 28th 2014: This is a maintenance release with no changes to the actual library source code. * Stop distributing benchmark data files that have unclear or unsuitable licensing. * Add support for padding chunks in the framing format. Snappy v1.1.1, October 15th 2013: * Add support for uncompressing to iovecs (scatter I/O). The bulk of this patch was contributed by Mohit Aron. * Speed up decompression by ~2%; much more so (~13-20%) on a few benchmarks on given compilers and CPUs. * Fix a few issues with MSVC compilation. * Support truncated test data in the benchmark. Snappy v1.1.0, January 18th 2013: * Snappy now uses 64 kB block size instead of 32 kB. On average, this means it compresses about 3% denser (more so for some inputs), at the same or better speeds. * libsnappy no longer depends on iostream. * Some small performance improvements in compression on x86 (0.5–1%). * Various portability fixes for ARM-based platforms, for MSVC, and for GNU/Hurd. Snappy v1.0.5, February 24th 2012: * More speed improvements. Exactly how big will depend on the architecture: - 3–10% faster decompression for the base case (x86-64). - ARMv7 and higher can now use unaligned accesses, and will see about 30% faster decompression and 20–40% faster compression. - 32-bit platforms (ARM and 32-bit x86) will see 2–5% faster compression. These are all cumulative (e.g., ARM gets all three speedups). * Fixed an issue where the unit test would crash on system with less than 256 MB address space available, e.g. some embedded platforms. * Added a framing format description, for use over e.g. HTTP, or for a command-line compressor. We do not have any implementations of this at the current point, but there seems to be enough of a general interest in the topic. Also make the format description slightly clearer. * Remove some compile-time warnings in -Wall (mostly signed/unsigned comparisons), for easier embedding into projects that use -Wall -Werror. Snappy v1.0.4, September 15th 2011: * Speeded up the decompressor somewhat; typically about 2–8% for Core i7, in 64-bit mode (comparable for Opteron). Somewhat more for some tests, almost no gain for others. * Make Snappy compile on certain platforms it didn't before (Solaris with SunPro C++, HP-UX, AIX). * Correct some minor errors in the format description. Snappy v1.0.3, June 2nd 2011: * Speeded up the decompressor somewhat; about 3-6% for Core 2, 6-13% for Core i7, and 5-12% for Opteron (all in 64-bit mode). * Added compressed format documentation. This text is new, but an earlier version from Zeev Tarantov was used as reference. * Only link snappy_unittest against -lz and other autodetected libraries, not libsnappy.so (which doesn't need any such dependency). * Fixed some display issues in the microbenchmarks, one of which would frequently make the test crash on GNU/Hurd. Snappy v1.0.2, April 29th 2011: * Relicense to a BSD-type license. * Added C bindings, contributed by Martin Gieseking. * More Win32 fixes, in particular for MSVC. * Replace geo.protodata with a newer version. * Fix timing inaccuracies in the unit test when comparing Snappy to other algorithms. Snappy v1.0.1, March 25th 2011: This is a maintenance release, mostly containing minor fixes. There is no new functionality. The most important fixes include: * The COPYING file and all licensing headers now correctly state that Snappy is licensed under the Apache 2.0 license. * snappy_unittest should now compile natively under Windows, as well as on embedded systems with no mmap(). * Various autotools nits have been fixed. Snappy v1.0, March 17th 2011: * Initial version.