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Thread: The best algorithm for high compression

  1. #1
    Member Wladmir's Avatar
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    The best algorithm for high compression

    What speed compression algorithm has close to 7-Zip compression level and near the paq8px?

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    generally I would say:

    There is no "best algorithm". It depends on the kind of data you want to compress. If you want a complete compression suite using several of the strongest algos (note: i did NOT say THE BEST ALGORITHM), like LZMA, I would advise freearc ( http://freearc.org/ ).
    Its author, Bulat, is very often also present here in this forum:

    http://encode.dreamhosters.com/showt...p?t=43&page=57

    You can find the very latest version here

    http://freearc.org/download/testing/...lpha-win32.exe

    See here for comparison to other compression progs ranked on efficiency:

    http://www.maximumcompression.com/da...y_mf2.php#data

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    Member Wladmir's Avatar
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    The best algorithm for high compression

    algorithm which is close to the speed and bzip2 compression level near the paq8px?

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    Quote Originally Posted by Wladmir View Post
    algorithm which is close to the speed and bzip2 compression level near the paq8px?
    Your question is a bit stupid.
    The most effective algorithms are not generally the fastest or the most powerful (the best compression ratio), and vice versa.

    You can choose just about any compromise.
    I think that the best criterion is the "compression time + (2x)transfer time + decompression time."

    faster computer = prefer more powerful (slower) algorithms
    faster transfer = prefer quicker (less powerful) algorithms

    http://compressionratings.com/calc.c...ull.html&id=10

    paq8px has extremely powerful compression ratio, but has damn slow speed.
    Personally, I prefer "nanozip" (I regret that it is only in alpha release ).
    Good compromise.
    Last edited by mindi; 16th April 2010 at 22:54.

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    Member Wladmir's Avatar
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    Melhor compress?o assim?trica

    Resultado das compara??es

    Arquivo usado: mssefullinstall-x86fre-pt-br-xp.exe

    Programa Tamanho (bytes)

    Nenhum 10.290.798
    PKZIP 8.835.345
    WinZIP 8.716.756
    CABARC 8.635.825
    WinRAR 8.623.192
    7-Zip 8.593.904
    FreeARC 8.559.853
    UHARC 8.511.799
    WinRK 8.507.796
    NanoZIP 8.373.933

    Algu?m sabe de algum algoritmo melhor que o NanoZIP que n?o seja derivado do paq?

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    Member Wladmir's Avatar
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    asymmetric compression

    Results of comparisons

    File used: mssefullinstall-x86fre-en-XP.exe

    Program Size (bytes)

    None 10,290,798
    PKZIP 8,835,345
    WinZIP 8,716,756
    CABARC 8,635,825
    WinRAR 8,623,192
    7-Zip 8,593,904
    FreeARC 8,559,853
    UHARC 8,511,799
    WinRK 8,507,796
    NanoZIP 8,373,933

    Does anyone know of a better algorithm that NanoZIP that is not derived from paq?

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    Why you're compressing a compressed installer? It's better to unpack it first.

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    Programmer Bulat Ziganshin's Avatar
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    nanozip -CO
    winrk "best asymmetric"
    rzm
    freearc -mx/-m9x
    7-zip

    plus srep and precomp as preprocessors

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    hi Wladimir,

    in my opinion, tests on an single and already compressed file, are not really representative... Try to test with a big set of data.

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