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The Right Tempo A blog by Felipe M. G. Ceotto

Have you guys heard of something called UHarc? I just found out today, because I had this file with extension .uha, and I wanted to know what it was. It's an interesting thing.

UHarc is a compression algorithm, written by Uwe Herklotz. It's still in version 0.6a, but seems to be really good. Its limitation is that the overall uncompressed files can't be sized over 2GB. It's got multimedia support, whatever that is. I'm assuming that this means that it will better compress multimedia files.

I've just run a little comparison here. UHarc is much slower than ZIP and RAR, but the files get a lot smaller. I've compressed 176 Word files (50 MB) with WinZip, WinRAR and WinUHA, all using their best possible compression. These are the results:

  WinZIP WinRAR WinUHA
Time to compress (mm:ss) 00:13 01:07 04:56
Compressed size (MB) 26.4 24.9 19.8

As we can see here, the UHarc format compressed the files at a much better ratio, but it took much, much longer. So, if you really have time, I suggest you use UHA. If you don't, well, if you don't, use ZIP. As seen here, the gain of RAR over ZIP is not too big, and it took almost 6 times more time than ZIP (at least with these files).

Of couse this is not a valid test, it's just an example. As I said I've used only Word files, and they usualy compress really well. They were all small files, and I had only 50MB of them. Still, I think UHA is something worth of a look. Another interesting point is that WinUHA is freeware, with no ads (as in you don't pay anything, not as in "free software" - source code is not available), while WinZIP and WinRAR are both sharewares.

There you go. If you have more information on UHarc, send feedback!

Posted on Wednesday, March 22, 2006 8:23 AM General | Back to top


Comments on this post: UHarc

# re: UHarc
Requesting Gravatar...
Did you know 7-zip? Give it a try and post the results :)

http://7-zip.org/
Left by Fernando Brunelli on Mar 22, 2006 10:54 AM

# re: UHarc
Requesting Gravatar...
KGB Archiver
Try this. i converted a cd of 700 mb to 50 mb
Left by Lily Garcia on Sep 19, 2006 3:19 AM

# re: UHarc
Requesting Gravatar...
i need it
Left by oga on Mar 28, 2007 4:27 AM

# re: UHarc
Requesting Gravatar...
Use DOS base UHARC. I heard somewhere that it is much better than WinUHA.
I have one problem that how to include folders in that archive?
Will u solve it?

Thanks...
Left by Sanket on Apr 23, 2007 11:52 AM

# re: UHarc
Requesting Gravatar...
I did a similar comparison with an simple .exe file and discovered that UHarc is the compression algorithm to utilize. The general public should be aware that this type of compression can and should be used for any type of file, not soley for mulitmedia.
Left by Roderick on Dec 15, 2007 7:07 PM

# re: UHarc
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i need it please.
Left by vishal on Apr 26, 2008 2:29 PM

# re: UHarc
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simply the best , untill now .
Left by ravi dewangan on Oct 15, 2008 4:38 PM

# re: UHarc
Requesting Gravatar...
UHarc gets a best time compression, a great ratio, and a low processor and ram compromise, (LZMA) 7z takes more ram and processor that you can think.
Left by Felipe Alcacibar on Oct 30, 2008 1:12 PM

# re: UHarc
Requesting Gravatar...
"I have one problem that how to include folders in that archive?
Will u solve it?"

The command should be like this

UHARC a -r [Some other switches you might wanna add] [target] [source]

Note: the main thing to help you add folders is the switch I used that's "-r"
Left by Tafhim on Jan 29, 2009 7:53 AM

# re: UHarc
Requesting Gravatar...
i need UHARC which is based on ms-doc
Left by sachin on May 18, 2009 6:53 AM

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