Re: Why is 2.4.32 four times faster than 2.6.14.6??

[Grant Coady]

On Sun, 8 Jan 2006 13:04:22 +0100 (MET), Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx> wrote:

>
>>grant@deltree:~$ time grep -v 192\.168\. /var/log/apache/access_log |cut -c-96
>>
>>real    0m1.671s
>>user    0m0.550s
>>sys     0m0.300s
>>grant@deltree:~$ time grep -v 192\.168\. /var/log/apache/access_log |cut -c-96 >/dev/null
>>
>>real    0m0.510s
>>user    0m0.420s
>>sys     0m0.080s
>
>Given that the first command is the first one accessing access_log at 
>all, then: the second time, access_log is already cached and 
>therefore can be accessed faster.

I did repeat measurements to check for variation due to caching, 
and that is not what is happening, we comparing going out over 
ssh terminal to dumping output locally.

Grant.
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