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Thread: PIM archiver, the version 1.0alpha1 is here! [!]

  1. #1
    The Founder encode's Avatar
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    Okay, let me introduce the brand new archiver called PIM. This version have:
    + Multiple-files feature
    + EXE-filter
    + Archive listing feature
    + Archive integrity checking

    Enjoy!

    Link:
    Download PIM 1.0alpha1 (30 KB)

    Archives created by this archiver have the same extension as by PIMPLE - '.pim'. But very soon, this archiver become a flagship of ENCODE.RU!


  2. #2
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    Thanks Ilia!

  3. #3
    The Founder encode's Avatar
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    Also note, the total size of all files in archive CAN be larger than 2 GB! But we have a resctricted compressed output size. Due to my experiments, the output size can be about 4+ GB. If we have compresison ratio about 25%, totally we can compress a 16 GB of data! But size of each file is restricted to 2 GB.

    Also note, while the archiver in 'alpha' development stage, I will break compatibility - improving compression, archive structure, etc. So, be careful!


  4. #4
    Guest
    I will continue to test it thoroughly but so far I'm VERY happy with the results.

    Both speed and compression are impressive. Compression not far behind 7-Zip (Ultra) on my testset but much faster.


  5. #5
    Guest
    Good news - finally there is multiple-files feature. Thanks Ilia!

    But: PIM 1.0alpha1 compression is disappointing.

    Test set: 100 files, great variety of data types, 8MB total size
    3.166.311 bytes 6,6 sec PIM 1.0alpha1
    for comparison:
    2.553.597 bytes 7,7 sec 7-Zip 4.42 -mx
    2.715.890 bytes 5,3 sec WinRar 3.60 -m5 -s
    2.875.138 bytes 3,4 sec UHArc -mz
    3.167.680 bytes 1,3 sec PKZip 2.50 -exx

    PIM shows even worse result if files are tared before compression!

  6. #6
    The Founder encode's Avatar
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    ...great variety of data types...

    Very strange results. But just a few notes. PIM performs relatively badly on "great variety of data types" - i.e. binary data, also the speed is noticeable affected on this data. It's all due to the PPM.


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