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[20050720]
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Large file compression: gzip < bzip2 < rzip
I haven't heared of rzip before either, but after someone mentioned
it on the g4u list when the topic came to compression of filesystem images
(i.e. large files), I had a look. Rzip claims to operates best at
"large" files, so I tried to compress a 512MB qemu
disk image, and here are the results:
-rw-r--r-- 1 root wheel 524288000 Mar 30 19:39 harddisk
-rw-r--r-- 1 feyrer wheel 241776704 Jul 20 04:14 harddisk.gz
-rw-r--r-- 1 feyrer wheel 228779032 Jul 20 04:55 harddisk.bz2
-rw-r--r-- 1 feyrer wheel 196960165 Jul 20 04:39 harddisk.rz
Rzip (.rz) seems the clear winner here with a compression ratio
of 2.66, compared to the 2.17 of "gzip -9" and 2.29 of "bzip2 -9".
Rzip is available in pkgsrc/archivers/rzip, check out the
rzip homepage for more information!
[Tags: benchmark, bzip, gzip, rzip]
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