141 lines
4.2 KiB
Plaintext
141 lines
4.2 KiB
Plaintext
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.
|