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  1. #1
    Join Date
    Feb 2015
    Thanked 67 Times in 25 Posts

    7-Zip binaries using the Fast LZMA2 lib

    Attached are 64-bit 7-Zip binaries which use the new library. I'll put the source on github soon. They are v 17.01 because I haven't merged v 18 yet.

    In the GUI, the initial word size setting may be loaded from the registry. It's best to initialize by changing the level because the default values are higher than normal 7z.

    The compression levels use the same dictionary size as normal 7z, which results in a little less compression because the MF is a block algorithm. Bumping the level up one tends to even it out. Size at level 8 & 9 is higher than normal 7z at 128Mb.

    Note the low multithread memory usage

    EDIT: attached an updated version due to a bug in my 7-zip stream handler which caused it to infinite loop after the library finished compressing, if dict > input size. This version has smoother progress updates too.

    EDIT 2: Fixed a crash when progress is set to NULL, e.g. with filters like BCJ2

    EDIT 3: It has now passed plenty of automated testing and is released on github for x86 and x64:
    Last edited by Conor; 9th March 2018 at 15:26.

  2. Thanks (6):

    Bulat Ziganshin (16th January 2018),Gonzalo (16th January 2018),JaegerFox (17th September 2018),load (5th March 2018),Stephan Busch (1st March 2018),Zonder (17th January 2018)

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