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On Sun, 8 Jan 2006 13:04:22 +0100 (MET), Jan Engelhardt <jengelh@linux01.gwdg.de> 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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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