Compressions compared

I had a folder full of random files to compress (things that wound up on my Desktop over a period of time). I’d just installed p7zip via fink (“fink install p7zip”) so I thought I’d compare it against some of the other options. The results:

Compression size (bytes)
.tar.7z 260617470
StuffIt 10 265169876
.zip 268555657
None 271287287

So it looks like tarring and then p7zipping is out ahead. The downsides of course being

  • p7zip isn’t currently available via a tar commandline argument (you have to pipe, unlike bzip2 and gz which are the ‘j’ and ‘z’ tar arguments respectively).
  • No Spotlight plugins for the p7zip format that I know of.

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