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Windows 7: file compressor

30 Nov 2009   #11

Windows 7 x64 Professional

word out in the street says that 7zip is better in terms of compression, by a slight margin. The LZMA algorithm is actually freely available as a SDK and many programs incorporate it in their I/O. That's another reason why I like it.

In terms of speed, as far as my experience goes, are also pretty similar. They're actually both very slow compared to the older ones like zip, for a good reason- PC's are much more fast and therefore can handle the extra thinking.

What I know about 7zip is that it takes a LOT of memory to compress things (i think in the magnitude of ~500 MB) but about a tenth of that when decompressing.

The WinRAR decoding algorithm is only available freely (and with certain restrictions), however, and I don't favor it as much as someone offering the whole thing.

In terms of functionality though, both programs do their job flawlessly. It won't hurt to have both programs installed actually, although it would be redundant.

My System SpecsSystem Spec
30 Nov 2009   #12

windows 7 64bit build 7600

i had a little test myself with nearly a 1gb file
7zip's compression was slightly better than winrar but took slightly longer
so on ballance there very very close to each other, except of course one is free
My System SpecsSystem Spec
14 Sep 2010   #13

Windows 7 Ultimate x64

I know this thread is a bit old, but I did some testing with 7zip today as I was evaluating some third party accelerator appliances and thought that I would share my results.

I compared the speed between WinRAR 3.93 64-bit versus 7-zip 4.65 64-bit.
I used a SQL database backup file, which was 3,668,050KB for my highly compressible.

WinRAR results
  • At Normal compression, took 4:31 to compress and resulted in 443,564KB file
  • At Best compression, took 7:06 to compress and resulted in 420,922KB file
  • At Fastest compression, took 1:05 to compress and resulted in 641,845KB file
7zip results
  • At normal compression, took 14:18 to compress and resulted in 363,480KB file
  • At fast compression, took 2:46 to compress and resulted in 461,324KB file
  • At fastest compression, took 2:17 to compress and resulted in 483,733KB file.
So, i personally feel that 7zip at Fast Compression is the best of the mix. It's time is very competitive and the file size is smaller.

Worth mentioning was that WinRAR took about 75-90% CPU, running about 35MB of RAM to run the tests....while 7zip was using about 48-52% of the CPU and using about 10MB of RAM.

Finally, WINRAR costs money and 7zip is free (even for commercial use).

My vote goes to 7zip.
My System SpecsSystem Spec

19 Sep 2010   #14

windows 7 64bit build 7600

thanks for sharing that pparks1
on your 7zip at normal compression youve got it took 14:18 is that right or was it meant to be 4:18?
is there any file types that winrar does that 7zip wont?
My System SpecsSystem Spec

 file compressor

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