Date: Fri, 13 Jul 2007 00:03:19 +0200 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: "Sean C. Farley" <scf@FreeBSD.org> Cc: freebsd-arch@FreeBSD.org Subject: Re: Assembly string functions in i386 libc Message-ID: <86hco95lg8.fsf@dwp.des.no> In-Reply-To: <20070712161200.I8789@thor.farley.org> (Sean C. Farley's message of "Thu\, 12 Jul 2007 16\:27\:49 -0500 \(CDT\)") References: <20070711134721.D2385@thor.farley.org> <20070711221338.GC20178@turion.vk2pj.dyndns.org> <200707112221.l6BML722062857@apollo.backplane.com> <20070711183217.C2385@thor.farley.org> <86lkdl5osc.fsf@dwp.des.no> <20070712161200.I8789@thor.farley.org>
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"Sean C. Farley" <scf@FreeBSD.org> writes: > On Thu, 12 Jul 2007, Dag-Erling Sm=C3=B8rgrav wrote: > > The first rule of optimization is: don't do it. > > The second rule of optimization is: don't do it yet. > > The third rule of optimization is: don't optimize what you haven't > > measured. > I am a rule breaker at least for the first two. :) I tried to follow > the third rule. > > > Can you show us an actual application that spends a significant part > > of its run time in strlen()? > My test program that loops over strlen(). So the answer is no, and you don't understand the third rule which you claim to follow. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no
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