Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752590AbWAHMEa (ORCPT ); Sun, 8 Jan 2006 07:04:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752592AbWAHMEa (ORCPT ); Sun, 8 Jan 2006 07:04:30 -0500 Received: from linux01.gwdg.de ([134.76.13.21]:26061 "EHLO linux01.gwdg.de") by vger.kernel.org with ESMTP id S1752590AbWAHME3 (ORCPT ); Sun, 8 Jan 2006 07:04:29 -0500 Date: Sun, 8 Jan 2006 13:04:22 +0100 (MET) From: Jan Engelhardt To: Grant Coady cc: Bernd Eckenfels , linux-kernel@vger.kernel.org Subject: Re: Why is 2.4.32 four times faster than 2.6.14.6?? In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 810 Lines: 26 >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. Jan Engelhardt -- | Alphagate Systems, http://alphagate.hopto.org/ | jengelh's site, http://jengelh.hopto.org/ - 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/