On Sun, 14 Oct 2007, Al Viro wrote:
On Sun, Oct 14, 2007 at 09:46:15PM +0200, Jan Engelhardt wrote:
(Obviously we shall pick .7z)
The hell it is. Take a look at memory footprint of those suckers...
For compression with -mx=9 it does use 500-900 MiB of RAM, that is true.
For decompression, 50-70 MiB.
Each have their pros/cons but nothing can compress the kernel any further
than 7z, supports stdin/stdout and also has a native windows port. I used
to strictly use bzip2 for backups and such but if I can pick off an
additional 20-30% more than bzip2 for my backups which I will not use often,
7zip seems to be the winner for space savings and possibly for
bandwidth/cost savings..
compress:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
10544 war 20 0 700m 681m 1632 S 141 20.7 1:41.46 7z
decompress:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
11927 war 20 0 71256 66m 1536 R 88 2.0 0:04.07 7z
Justin.
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