On 12/22/08 10:49, Osamu Aoki wrote:
On Mon, Dec 22, 2008 at 05:13:17PM +0200, Eugene V. Lyubimkin wrote:
Thomas Preud'homme wrote:
The Monday 22 December 2008 13:53:43 Eugene V. Lyubimkin, you wrote :
...
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.
Well.... bzip is slow anyway even with SMP.
The full story is here on my amd64 core2duo system:
Summary: (with -1 option for speed, real time for compression)
Binary files Text file
time(s) size time(s) size
cp 0.060 13166592 0.129 40323584
lzop 0.448 12727856 2.526 28777352
gzip 0.911 12689884 3.526 27281520
pbzip2 2.027 12804577 4.800 25928838
lzma 3.808 12772852 7.636 25926966
bzip2 4.358 12804175 9.938 25919654
Compressing the 289MB linux-source-2.6.27.tar file on an AMD 64X2
running 32-bit userland (and 8GB RAM):
$ time \
> for i in {1..3};
> do
> bzip2 -q linux-source-2.6.27_0${i}.tar;
> done
real 5m21.145s
user 5m15.682s
sys 0m2.857s
Total: 10m40s
$ time \
> for i in {4..6};
> do
> pbzip2 linux-source-2.6.27_0${i}.tar;
> done
real 2m56.583s
user 5m19.420s
sys 0m9.235s
Total: 8m15s
$ time \
> for i in {7..9};
> do
> pbzip2 -r linux-source-2.6.27_0${i}.tar;
> done
real 2m51.188s
user 5m18.826s
sys 0m3.417s
Total: 8m13s.
--
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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