7-Zip / Bzip2

Ben Cadieux ben.cadieux at gmail.com
Tue May 6 11:49:04 PDT 2008

For everyone concerned with timing, I tested compressing a 4gb image
of a quad boot USB key with a variety of junk on it at compression
level "4".

It still beats bzip2 by 90 mb and was almost 3 minutes quicker:

# time -h bzip2 -k key.img
        11m59.71s real          10m39.48s user          5.03s sys
# time -h 7z a -mx=4 key.img.7z key.img
        8m39.02s real           7m38.57s user           4.95s sys

# ls -la | grep key
-rw-r-----   1 sol   wheel  4102029312 Mar  8 11:27 key.img
-rw-------   1 root  wheel   904489376 May  6 11:38 key.img.7z
-rw-r-----   1 sol   wheel   997632056 Mar  8 11:27 key.img.bz2

Best Regards,
Ben Cadieux

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