Changelog for blosc-devel-1.11.2-21.2.x86_64.rpm :
Tue Apr 18 14:00:00 2017 toddrme2178AATTgmail.com
- Update to 1.11.2
- Enabled use as a CMake subproject, exporting shared & static library targets
for super-projects to use. See PRs #178, #179 and #180. Thanks to Kevin
Murray.
- Internal LZ4 codec updated to 1.7.5.
- Internal Zstd codec updated to 1.1.2.

Fri Sep 16 14:00:00 2016 toddrme2178AATTgmail.com
- Update to 1.11.1
- Fixed a bug introduced in 1.11.0 and discovered by pandas test suite. This
basically prevented to decompress buffers compressed with previous versions of
C-Blosc. See: https://github.com/Blosc/python-blosc/issues/115
- Update to 1.11.0
- Internal Zstd codec upgraded to 1.0.0.
- New block size computation inherited from C-Blosc2. Benchmarks are saying that
this benefits mainly to LZ4, LZ4HC, Zlib and Zstd codecs, both in speed and in
compression ratios (although YMMV for your case).
- Added the AATTrpath flag in Mac OSX for shared libraries. Fixes #175.
- Added a fix for VS2008
- License changed from MIT to 3-clause BSD style.
- Update to 1.10.2
- Force the use of --std=gnu99 when using gcc. Fixes #174.
- Update to 1.10.1
- Removed an inconsistent check for C11 (__STDC_VERSION__ >= 201112L and
_ISOC11_SOURCE) as this seem to pose problems on compilers doing different
things in this check (e.g. clang). See
https://github.com/Blosc/bloscpack/issues/50.
- Update to 1.10.0
- Initial support for Zstandard (0.7.4). Zstandard (or Zstd for short) is a new
compression library that allows better compression than Zlib, but that works
typically faster (and some times much faster), making of it a good match for
Blosc.
- Update to 1.9.3
- Reverted a mistake introduced in 1.7.1. At that time, bit-shuffling
was enabled for typesize == 1 (i.e. strings), but the change also
included byte-shuffling accidentally. This only affected performance,
but in a quite bad way (a copy was needed). This has been fixed and
byte-shuffling is not active when typesize == 1 anymore.

Thu Jul 7 14:00:00 2016 toddrme2178AATTgmail.com
- Update to 1.9.2

* Check whether Blosc is actually initialized before blosc_init(),
blosc_destroy() and blosc_free_resources(). This makes the library
more resistant to different initialization cycles
(e.g. https://github.com/stevengj/Blosc.jl/issues/19).
- Update to 1.9.1

* The internal copies when clevel=0 are made now via memcpy(). At the
beginning of C-Blosc development, benchmarks where saying that the
internal, multi-threaded copies inside C-Blosc were faster than
memcpy(), but 6 years later, memcpy() made greats strides in terms
of efficiency. With this, you should expect an slight speed
advantage (10% ~ 20%) when C-Blosc is used as a replacement of
memcpy() (which should not be the most common scenario out there).

* Added a new DEACTIVATE_AVX2 cmake option to explicitly disable AVX2
at build-time. Thanks to James Bird.

* The ``make -jN`` for parallel compilation should work now. Thanks
to James Bird.
- Update to 1.9.0

* New blosc_get_nthreads() function to get the number of threads that
will be used internally during compression/decompression (set by
already existing blosc_set_nthreads()).

* New blosc_get_compressor() function to get the compressor that will
be used internally during compression (set by already existing
blosc_set_compressor()).

* New blosc_get_blocksize() function to get the internal blocksize to
be used during compression (set by already existing
blosc_set_blocksize()).

* Now, when the BLOSC_NOLOCK environment variable is set (to any
value), the calls to blosc_compress() and blosc_decompress() will
call blosc_compress_ctx() and blosc_decompress_ctx() under the hood
so as to avoid the internal locks. See blosc.h for details. This
allows multi-threaded apps calling the non _ctx() functions to avoid
the internal locks in C-Blosc. For the not multi-threaded app
though, it is in general slower to call the _ctx() functions so the
use of BLOSC_NOLOCK is discouraged.

* In the same vein, from now on, when the BLOSC_NTHREADS environment
variable is set to an integer, every call to blosc_compress() and
blosc_decompress() will call blosc_set_nthreads(BLOSC_NTHREADS)
before the actuall compression/decompression process. See blosc.h
for details.

* Finally, if BLOSC_CLEVEL, BLOSC_SHUFFLE, BLOSC_TYPESIZE and/or
BLOSC_COMPRESSOR variables are set in the environment, these will be
also honored before calling blosc_compress().

* Calling blosc_init() before any other Blosc call, although
recommended, is not necessary anymore. The idea is that you can use
just the basic blosc_compress() and blosc_decompress() and control
other parameters (nthreads, compressor, blocksize) by using
environment variables (see above).
- Update to 1.8.1

* Disable the use of __builtin_cpu_supports() for GCC 5.3.1
compatibility.
- Update to 1.8.0

* The code is (again) compatible with VS2008 and VS2010. This is
important for compatibility with Python 2.6/2.7/3.3/3.4.

* Introduced a new global lock during blosc_decompress() operation.
As the blosc_compress() was already guarded by a global lock, this
means that the compression/decompression is again thread safe.
However, when using C-Blosc from multi-threaded environments, it is
important to keep using the
*_ctx() functions for performance
reasons. NOTE: _ctx() functions will be replaced by more powerful
ones in C-Blosc 2.0.

Wed Mar 9 13:00:00 2016 toddrme2178AATTgmail.com
- Update to 1.7.1

* Fixed a bug preventing bitshuffle to work correctly on getitem().
Now, everything with bitshuffle seems to work correctly.

* Fixed the thread initialization for blosc_decompress_ctx(). Issue
[#158]. Thanks to Chris Webers.

* Fixed a bug in the blocksize computation introduced in 1.7.0. This
could have been creating segfaults.

* Allow bitshuffle to run on 1-byte typesizes.

* New parametrization of the blocksize to be independent of the
typesize. This allows a smoother speed throughout all typesizes.

* lz4 and lz4hc codecs upgraded to 1.7.2 (from 1.7.0).

* When calling set_nthreads() but not actually changing the number of
threads in the internal pool does not teardown and setup it anymore.
PR #153. Thanks to Santi Villalba.
- Update to 1.7.0

* Added a new \'bitshuffle\' filter so that the shuffle takes place at a
bit level and not just at a byte one, which is what it does the
previous \'shuffle\' filter.

* New acceleration mode for LZ4 and BloscLZ codecs that enters in
operation with complevel < 9. This allows for an important boost in
speed with minimal compression ratio loss. Francesc Alted.

* LZ4 codec updated to 1.7.0 (r130).

* PREFER_EXTERNAL_COMPLIBS cmake option has been removed and replaced
by the more fine grained PREFER_EXTERNAL_LZ4, PREFER_EXTERNAL_SNAPPY
and PREFER_EXTERNAL_ZLIB. In order to allow the use of the new API
introduced in LZ4 1.7.0, PREFER_EXTERNAL_LZ4 has been set to OFF by
default, whereas PREFER_EXTERNAL_SNAPPY and PREFER_EXTERNAL_ZLIB
continues to be ON.

* Implemented SSE2 shuffle support for buffers containing a number of
elements which is not a multiple of (typesize
* vectorsize). Jack
Pappas.

* Added SSE2 shuffle/unshuffle routines for types larger than 16
bytes. Jack Pappas.

* \'test_basic\' suite has been split in components for a much better
granularity on what\'s a possibly failing test. Also, lots of new
tests have been added. Jack Pappas.

* Fixed compilation on non-Intel archs (tested on ARM). Zbyszek
Szmek.

* Modifyied cmake files in order to inform that AVX2 on Visual Studio
is supported only in 2013 update 2 and higher.

* Added a replacement for stdbool.h for Visual Studio < 2013.

* blosclz codec adds Win64/Intel as a platform supporting unaligned
addressing. That leads to a speed-up of 2.2x in decompression.

* New blosc_get_version_string() function for retrieving the version
of the c-blosc library. Useful when linking with dynamic libraries
and one want to know its version.

* New example (win-dynamic-linking.c) that shows how to link a Blosc
DLL dynamically in run-time (Windows only).

* The `context.threads_started` is initialized now when decompressing.
This could cause crashes in case you decompressed before compressing
(e.g. directly deserializing blosc buffers). AATTatchouprakov.

* The HDF5 filter has been removed from c-blosc and moved into its own
repo at: https://github.com/Blosc/hdf5

* The MS Visual Studio 2008 has been tested with c-blosc for ensuring
compatibility with extensions for Python 2.6 and up.
- Remove update-included 0001-Fix-cmake-system-check.patch and
0002-Fix-compilation-on-unknown-archs.patch

Mon Feb 15 13:00:00 2016 mkravecAATTsuse.com
- Replaced long syntax with macros %cmake, %cmake_install, %ctest

Fri Aug 7 14:00:00 2015 normandAATTlinux.vnet.ibm.com
- Add two patches dragged from fedora to support non-intel archi
0001-Fix-cmake-system-check.patch
0002-Fix-compilation-on-unknown-archs.patch

Tue May 19 14:00:00 2015 toddrme2178AATTgmail.com
- Update to version 1.6.1:

* Fixed a subtle, but long-standing bug in the blosclz codec that
could potentially overwrite an area beyond the output buffer.

* Support for runtime detection of AVX2 and SSE2 SIMD
instructions, allowing running AVX2 capable c-blosc libraries
to run on machines with no AVX2 available (will use SSE2
instead).

* A new blocksize computation allows for better compression
ratios for larger typesizes (> 8 bytes), without not penalizing
the speed too much (at least on modern CPUs).
- changes from version 1.6.0:

* Support for AVX2 is here! The benchmarks with a 4-core Intel
Haswell machine tell that both compression and decompression are
accelerated around a 10%, reaching peaks of 9.6 GB/s during
compression and 26 GB/s during decompression (memcpy() speed for
this machine is 7.5 GB/s for writes and 11.7 GB/s for reads).
Many thanks to AATTlittlezhou for this nice work.

* Support for HPET (high precision timers) for the `bench` program.
This is particularly important for microbenchmarks like bench is
doing; since they take so little time to run, the granularity of a
less-accurate timer may account for a significant portion of the
runtime of the benchmark itself, skewing the results. Thanks to
Jack Pappas.
- changes from version 1.5.4:

* Updated to LZ4 1.6.0 (r128).

* Fix resource leak in t_blosc. Jack Pappas.

* Better checks during testing. Jack Pappas.

* Dynamically loadable HDF5 filter plugin. Kiyo Masui.
- changes from version 1.5.3:

* Use llabs function (where available) instead of abs to avoid
truncating the result. Jack Pappas.

* Use C11 aligned_alloc when it\'s available. Jack Pappas.

* Use the built-in stdint.h with MSVC when available. Jack Pappas.

* Only define the __SSE2__ symbol when compiling with MS Visual C++
and targeting x64 or x86 with the correct /arch flag set. This
avoids re-defining the symbol which makes other compilers issue
warnings. Jack Pappas.

* Reinitializing Blosc during a call to set_nthreads() so as to fix
problems with contexts. Francesc Alted.
- changes from version 1.5.2:

* Using blosc_compress_ctx() / blosc_decompress_ctx() inside the
HDF5 compressor for allowing operation in multiprocess scenarios.
See: https://github.com/PyTables/PyTables/issues/412
The drawback of this quick fix is that the Blosc filter will be only
able to use a single thread until another solution can be devised.
- changes from version 1.5.1:

* Updated to LZ4 1.5.0. Closes #74.

* Added the \'const\' qualifier to non SSE2 shuffle functions. Closes
[#75].

* Explicitly call blosc_init() in HDF5 blosc_filter.c, fixing a
segfault.

* Quite a few improvements in cmake files for HDF5 support. Thanks
to Dana Robinson (The HDF Group).

* Variable \'class\' caused problems compiling the HDF5 filter with
g++. Thanks to Laurent Chapon.

* Small improvements on docstrings of c-blosc main functions.
- changes from version 1.5.0:

* Added new calls for allowing Blosc to be used
*simultaneously
*
(i.e. lock free) from multi-threaded environments. The new
functions are:
- blosc_compress_ctx(...)
- blosc_decompress_ctx(...)
See the new docstrings in blosc.h for how to use them. The previous
API should be completely unaffected. Thanks to Christopher Speller.

* Optimized copies during BloscLZ decompression. This can make
BloscLZ to decompress up to 1.5x faster in some situations.

* LZ4 and LZ4HC compressors updated to version 1.3.1.

* Added an examples directory on how to link apps with Blosc.

* stdlib.h moved from blosc.c to blosc.h as suggested by Rob Lathm.

* Fix a warning for {snappy,lz4}-free compilation. Thanks to Andrew
Schaaf.

* Several improvements for CMakeLists.txt (cmake).

* Fixing C99 compatibility warnings. Thanks to Christopher Speller.
- specfile:

* update copyright year

Tue Jul 22 14:00:00 2014 toddrme2178AATTgmail.com
- Cleanup .so files

Tue Jul 22 14:00:00 2014 toddrme2178AATTgmail.com
- Use source url so source validation can run.
- Change group
- Cleanup post and postun

Thu Jul 17 14:00:00 2014 toddrme2178AATTgmail.com
- Update to 1.4.1

* Fixed a bug in blosc_getitem() introduced in 1.4.0. Added a test for
blosc_getitem() as well.
- Update to 1.4.0

* Support for non-Intel and non-SSE2 architectures has been added. In
particular, the Raspberry Pi platform (ARM) has been tested and all
tests pass here.

* Architectures requiring strict access alignment are supported as well.
Due to this, arquitectures with a high penalty in accessing unaligned
data (e.g. Raspberry Pi, ARMv6) can compress up to 2.5x faster.

* LZ4 has been updated to r119 (1.2.0) so as to fix a possible security
breach.
- Update to 1.3.6

* Updated to LZ4 r118 due to a (highly unlikely) security hole. For
details see:

Thu May 8 14:00:00 2014 toddrme2178AATTgmail.com
- Initial version