On 12/22/08 09:13, Eugene V. Lyubimkin wrote:
Thomas Preud'homme wrote:
The Monday 22 December 2008 13:53:43 Eugene V. Lyubimkin, you wrote :
Volkan YAZICI wrote:
Hi,
Are there any compression tools in the official Debian GNU/Linux
repositories that can take the benefit of multiple cores/cpus?
pbzip2?
I profit of this thread to ask you if you see amelioration with pbzip2. I made
2 tests on file of 50 MB and the result if approximately the same time as
bzip2 (a little much longer with pbzip2 !!!) but a CPU twice time more used.
I have a core 2 duo and time give me a usage of almost 200% with pbzip2
Anyone has better results ?
Yes, see following:
jac...@work:~/temp$ time tar -cjf temp1.tar.bz2 debian
real 0m18.830s
user 0m18.317s
sys 0m0.268s
jac...@work:~/temp$ time bash -c "tar -cf - debian | pbzip2 -c > temp2.tar.bz2"
real 0m10.494s
user 0m19.557s
sys 0m0.488s
10 is much less than 18.
That might be because much of the data is already cached. Each of
those commands should be run 3 times to get good numbers.
--
Ron Johnson, Jr.
Jefferson LA USA
I like my women like I like my coffee - purchased at above-market
rates from eco-friendly organic farming cooperatives in Latin America.
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