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Thread: 7-Zip

  1. #541
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    7-Zip 19.02 alpha was released.
    7-Zip for 64-bit Windows x64:
    https://7-zip.org/a/7z1902-x64.exe
    7-Zip for 32-bit Windows:
    https://7-zip.org/a/7z1902.exe
    What's new after 7-Zip 19.00:

    • 7-Zip now can unpack files encoded with Base64 encoding (b64 filename extension).
    • 7-Zip now can use new x86/x64 hardware instructions for SHA-1 and SHA-256, supported
      by AMD Ryzen and latest Intel CPUs: Ice Lake and Goldmont.
      It increases
      • the speed of SHA-1/SHA-256 hash value calculation,
      • the speed of encryption/decryption in zip AES,
      • the speed of key derivation for encryption/decryption in 7z/zip/rar archives.

    • The speed of zip AES encryption and 7z/zip/rar AES decryption was increased with
      the following improvements:
      • 7-Zip now can use new x86/x64 VAES (AVX Vector AES) instructions, supported by
        Intel Ice Lake CPU.
      • The existing code of x86/x64 AES-NI was improved also.

    • There is 2% speed optimization in 7-Zip benchmark's decompression.
    • Some bugs were fixed.
    Last edited by avitar; 6th September 2019 at 09:34. Reason: small update

  2. Thanks:

    Stephan Busch (6th September 2019)

  3. #542
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    7-Zip 19.02 alpha was released.

    there was a bug in SHA code

  4. Thanks (2):

    avitar (6th September 2019),Krishty (7th September 2019)

  5. #543
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    I think mfilter would be a very use case for a standalone executable. Would you mind, @aniskin, to try and compile it with a simple filein > fileout or stdin > stdout interface?
    It could be very helpful to test individual filters once becomes possible to discriminate them.

  6. #544
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    MFilter uses some functions provided by 7-Zip so it cannot be compiled as standalone app.

  7. #545
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    Thanks for the answer. Turns out there is no need after all, though. After just a little tinkering around, i discovered that

    Code:
    7z.exe a -mx0 -m0=mfilter -ms=off -- FILE.m7z FILE
    will do the trick just fine.

  8. #546
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    could it perhaps use CUDA ?

  9. #547
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    Quote Originally Posted by Aniskin View Post
    MFilter uses some functions provided by 7-Zip so it cannot be compiled as standalone app.
    Can kindly you add change-log to each plugin on your website so we know what changed..

  10. #548
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    is there an option to just store/copy files of given extension and compress others with -mqs and maximum solid lzma1 ?

  11. #549
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    Yes, like by running 7z twice and updating the archive?
    However there's no support for solid compression with dynamic codec switching, as it basically requires multipass processing.
    For example, how to get lzma to reference the data compressed with ppmd?
    Only by having lzma index unpacked data from ppmd... which has to be explicitly implemented and 7-zip doesn't have any support for this.

  12. #550
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    Smart7z plugin is an alternative.

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    MFilter: support of data in base64 format added.

  14. Thanks (2):

    maadjordan (12th October 2019),Stephan Busch (12th October 2019)

  15. #552
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    Great news. I tested it on MHT samples on https://www.fileformat.info/format/m...mple/index.htm and gain was on (yahoo.mht & microsoft.mht)

    also tested on XML files like https://github.com/schnaader/precomp...cacia_High.zip (after unpacked as its gzipped) and it worked ..

  16. #553
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    made an mfilter demo because apparently some people can't RTFM.
    http://nishi.dreamhosters.com/u/mfil...o_20191013.rar

  17. Thanks (2):

    load (16th October 2019),maadjordan (16th October 2019)

  18. #554
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    Mfilter handling of "tar" file in your package does not show good gain and then noticed that many of these jpg files are damaged
    Last edited by maadjordan; 16th October 2019 at 10:55.

  19. #555
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    Quote Originally Posted by maadjordan View Post
    Mfilter does not show good gain
    because of

    Quote Originally Posted by maadjordan View Post
    many most of jpg files are damaged

  20. #556
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    but nevertheless there is a gain

  21. #557
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    7-Zip 20.00 alpha

    x86 https://7-zip.org/a/7z2000.exe
    x64 https://7-zip.org/a/7z2000-x64.exe


    • 7-Zip now supports new optional match finders for LZMA/LZMA2 compression: bt5 and hc5, that can work faster than bt4 and hc4 match finders for the data with big redundancy.
    • The compression ratio was improved for Fast and Fastest compression levels with the following default settings:
    • Fastest level (-mx1) : hc5 match finder with 256 KB dictionary.
    • Fast level (-mx3) : hc5 match finder with 4 MB dictionary.
    • Minor speed optimizations in multithreaded LZMA/LZMA2 compression for Normal/Maximum/Ultra compression levels.
    • bzip2 decoding code was updated to support bzip2 archives, created by lbzip2 program.
    • Some bugs were fixed.
    • New localization: Turkmen.

  22. Thanks (3):

    Bulat Ziganshin (7th February 2020),DZgas (10th February 2020),Sergey3695 (31st March 2020)

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