Skip to content

Release 1.14.0
Compare
Choose a tag to compare
@FrancescAlted FrancescAlted released this 23 Feb 09:57
v1.14.0
3f2464b

  • New split mode that favors forward compatibility. That means that,
    from now on, all the buffers created starting with blosc 1.14.0 will
    be forward compatible with any previous versions of the library --at
    least until 1.3.0, when support for multi-codec was introduced.

    So as to select the split mode, a new API function has been introduced:
    https://github.com/Blosc/c-blosc/blob/master/blosc/blosc.h#L500
    Also, the BLOSC_SPLITMODE environment variable is honored when using
    the blosc_compress() function. See
    https://github.com/Blosc/c-blosc/blob/master/blosc/blosc.h#L209

    There is a dedicated blog entry about this at:
    http://blosc.org/posts/new-forward-compat-policy/
    More info in PR #216.

    Caveat Emptor: Note that Blosc versions from 1.11.0 to 1.14.0 might
    generate buffers that cannot be read with versions < 1.11.0, so if
    forward compatibility is important to you, an upgrade to 1.14.0 is
    recommended.

  • All warnings during cmake build stage are enabled by default now.
    PR #218. Thanks to kalvdans.

  • Better checks on versions of formats inside Blosc. PR #219. Thanks
    to kalvdans.

  • The BLOSC_PRINT_SHUFFLE_ACCEL environment variable is honored now.
    This is useful for determining at runtime whether the different SIMD
    capabilities (only for Intel processors) are available to Blosc to get
    better performance during shuffle/bitshuffle operation. As an example,
    here it is the normal output for the simple.c example:

    $ ./simple
    Blosc version info: 1.14.0.dev ($Date:: 2018-02-15 #$)
    Compression: 4000000 -> 41384 (96.7x)
    Decompression succesful!
    Succesful roundtrip!

    and here with the BLOSC_PRINT_SHUFFLE_ACCEL environment variable set:

    $ BLOSC_PRINT_SHUFFLE_ACCEL= ./simple
    Blosc version info: 1.14.0.dev ($Date:: 2018-02-15 #$)
    Shuffle CPU Information:
    SSE2 available: True
    SSE3 available: True
    SSSE3 available: True
    SSE4.1 available: True
    SSE4.2 available: True
    AVX2 available: True
    AVX512BW available: False
    XSAVE available: True
    XSAVE enabled: True
    XMM state enabled: True
    YMM state enabled: True
    ZMM state enabled: False
    Compression: 4000000 -> 41384 (96.7x)
    Decompression succesful!
    Succesful roundtrip!

    Blosc only currently leverages the SSE2 and AVX2 instruction sets, but
    it can recognize all of the above. This is useful mainly for debugging.

Assets 2
Loading