Messages in this thread | | | Date | Sun, 25 May 2008 17:40:42 +0200 (CEST) | From | Jan Engelhardt <> | Subject | Re: question about splice performance |
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On Sunday 2008-05-25 17:12, Francis Moreau wrote:
>Hi, > >I did a really basic benchmark and was suprise about the results. > >$ echo 3 > /proc/sys/vm/drop_caches >$ time splice-cp vmlinux /tmp/vmlinux > >real 0m10.158s >user 0m0.002s >sys 0m0.401s > >$ echo 3 > /proc/sys/vm/drop_caches >$ time cp vmlinux /tmp/vmlinux > >real 0m10.590s >user 0m0.017s >sys 0m0.459s > > >I was expecting splice-cp case to be faster. > >Could someone enlight me ?
Slow disk outweighs memory copying overhead. And 300 MB is quickly transferred in idle systems.
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