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Thread: Fast File Compare

  1. #1
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    I use File Compare XP to compare files as part of my compression/decompression tests. I find it invaluable for comparing very large files at high speed.

    File Compare XP is a small useful utility to compare file to file against several
    comparison factors like extension, size, version and even CRC32.
    This way you can be sure that file is the same or not.
    CRC32 is very reliable way but other factors may also be important.
    I would like to know if anyone knows of a better/faster FREE file compare program?

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    I use MD5 Check, don't know if it's faster, but I find it more user-friendly. However, I prefer seeing file's CRC32 in winrar, though

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    Quote Originally Posted by Black_Fox
    I use MD5 Check, dont know if its faster, but I find it more user-friendly.
    Thanks!

    I tested "MD5 Check" with a file to file compare on the medium (1.57GB) test file from my large testset. I stopped the test before it had completed because IMO it was taking far too long to complete the task.

    MD5 Check seems like a good app but its much too slow for large files.

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    My favourite is bit-compare plugin for foobar for music files checking

    BTW LovePimple, are you Netstore 101 admin?

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    Quote Originally Posted by Black_Fox
    BTW LovePimple, are you Netstore 101 admin?
    Why do you ask this?

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    Netstore 101 and ocamyd's page were the first, where links to my site appeared... And I posted the link firstly here, so I thought somebody being here frequently should add it also to these pages ...actually don't know if Frank Schwellinger comes here often, but...

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    I understand!

    I'm not Netstore 101 admin, but I know who is simply because they keep in contact with me by email.

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    The Founder encode's Avatar
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    Quote Originally Posted by Black_Fox
    I use MD5 Check, dont know if its faster, but I find it more user-friendly. However, I prefer seeing files CRC32 in winrar, though
    I also use the WinRARs CRC checking. Sometimes I use MD5 too. However, latest Quad has the built-in CRC32 checking and note that:
    Edit:
    CRC32 checksum
    + File size
    + Arithmetic encoder with error checking
    = 99.9998% error detection...


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    Quote Originally Posted by encode
    FIles CRC32 + File size, gives 99.99% error detection...
    Thats good enough for me!

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    You can try this
    http://www.insidepro.com/download/md5inside.zip
    It's free and fastest md5 hash generator, but GUI only.
    http://www.insidepro.com/download/passwordspro_free.zip
    Same, more options (to crack windows passwords
    and this
    http://www.slavasoft.com/fsum/
    Command line, fast

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    Quote Originally Posted by nimdamsk
    You can try this
    http://www.insidepro.com/download/md5inside.zip
    Its free and fastest md5 hash generator, but GUI only.
    http://www.insidepro.com/download/passwordspro_fre e.zip
    Same, more options (to crack windows passwords
    and this
    http://www.slavasoft.com/fsum/
    Command line, fast
    Thanks! Will give them a try!

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    I think FSUM is AWESOME!!! Command line, choice of 11 most popular hash and checksum algorithms, very fast, wildcards, etc.

    Thanks nimdamsk!

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    Found CRC32 checksum source code for pascal, I'll try to put it into Delphi

    EDIT: OK I won't, will have to reinstall windows first (corrupted windows installer)

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    Quote Originally Posted by Black_Fox
    (corrupted windows installer)
    How did this happen?

    Quote Originally Posted by Black_Fox
    EDIT: OK I wont, will have to reinstall windows first
    You could restore Windows very quickly If you kept a regular Ghost backup.

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    Quote Originally Posted by LovePimple
    How did this happen?
    Dont know... one in ten installations gone wrong Or maybe bug in current nLite version.
    Quote Originally Posted by LovePimple
    You could restore Windows very quickly If you kept a regular Ghost backup.
    I actually used exactly that, but since August I was playing around with nLite so I was creating different windows installation CD each week -> no point in ghot backup-ing it

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    Have you ever tried BartPE or KNOPPIX Linux?

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    Quote Originally Posted by Black_Fox
    Found CRC32 checksum source code for pascal, Ill try to put it into Delphi
    Just for note, here are come sources for Delphi, some with assembler opimisations:

    URL

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    Quote Originally Posted by LovePimple
    Have you ever tried BartPE or KNOPPIX Linux?
    No, I havent, only heard about them. Is Knoppix that distribution that can divide its CPU time etc. requests between more than one computer?

    Quote Originally Posted by nimdamsk
    Just for note, here are come sources for Delphi, some with assembler opimisations:
    Thanks!

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    Quote Originally Posted by Black_Fox
    Is Knoppix that distribution that can divide its CPU time etc. requests between more than one computer?
    I dont think so.

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    Quote Originally Posted by Black_Fox
    (corrupted windows installer)
    Quote Originally Posted by LovePimple
    How did this happen?
    Quote Originally Posted by nLite 1.3RC2 changelog
    fix: Correct MSI Installer registry permission
    My Win installation iso weighs 154MB now and still contains everything that I see useful in it Will try doing crc32 in delphi finally... at least could use it as a part of final exams program

  21. #21
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    Hi, I developed an utility for file byte-to-byte comparison times ago, check for "File Tools" in http://giorgiotani.interfree.it/software_old.html
    Linux and Windows version are available, along the sourcecode (FreePascal); please note that is a quite old project, unsupported from more than one year.
    Probably I'll replicate (better) those functions and integrate them in PeaZip in future.

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    Thanks Giorgio!

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