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Change Logs

Version: 1.13.5-bp150.2.5
* Tue Feb 06 2018
- Update to version 1.13.5:
  * Fixed a buffer overrun that happens when compressing small
    buffers and len(destination_buffer) < (len(source_buffer) +
    BLOSC_MAX_OVERHEAD). Reported by Ivan Smirnov.
  * Tests work now when external compressors are located in
    non-system locations. Fixes #210. Thanks to Leif Walsh.
  * Fixed a bug uncovered by the python-blosc test suite: when a
    buffer is to be copied, then we should reserve space for the
    header, not block pointers.
  * Serious optimization of memory copy functions (see new
    blosc/fastcopy.c). This benefits the speed of all the codecs,
    but specially the BloscLZ one. As a result of the above, the
    BloscLZ codec received a new adjustment of knobs so that you
    should expect better compression ratios with it too.
* Thu Dec 28 2017
- Fix RPM group. Compact descriptions.
* Sun Dec 24 2017
- Update to version 1.12.1:
  * Backported BloscLZ parameters that were fine-tuned for
- Packaging changes:
  * Run spec-clener
  * Use shared libraries with compression codecs instead of bundled
  * Use more of cmake macros
  * Build in parallel
* Tue Apr 18 2017
- 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
  - Internal LZ4 codec updated to 1.7.5.
  - Internal Zstd codec updated to 1.1.2.
* Fri Sep 16 2016
- 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:
- 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 @rpath 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
- 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
- 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 07 2016
- 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
- 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
  * New blosc_get_blocksize() function to get the internal blocksize to
    be used during compression (set by already existing
  * 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.
    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
- 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 09 2016
- 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
    continues to be ON.
  * Implemented SSE2 shuffle support for buffers containing a number of
    elements which is not a multiple of (typesize * vectorsize).  Jack
  * 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
  * 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).  @atchouprakov.
  * The HDF5 filter has been removed from c-blosc and moved into its own
    repo at:
  * 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
* Mon Feb 15 2016
- Replaced long syntax with macros %cmake, %cmake_install, %ctest
* Fri Aug 07 2015
- Add two patches dragged from fedora to support non-intel archi
* Tue May 19 2015
- 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
  * 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 @littlezhou 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.
    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
  * Explicitly call blosc_init() in HDF5 blosc_filter.c, fixing a
  * 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
  * Several improvements for CMakeLists.txt (cmake).
  * Fixing C99 compatibility warnings.  Thanks to Christopher Speller.
- specfile:
  * update copyright year
* Tue Jul 22 2014
- Cleanup .so files
* Tue Jul 22 2014
- Use source url so source validation can run.
- Change group
- Cleanup post and postun
* Thu Jul 17 2014
- 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
- Update to 1.3.6
  * Updated to LZ4 r118 due to a (highly unlikely) security hole.  For
    details see:
* Thu May 08 2014
- Initial version