Date: Mon, 22 Aug 2005 10:38:41 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Divacky Roman <xdivac02@stud.fit.vutbr.cz> Cc: freebsd-current@freebsd.org, Giorgos Keramidas <keramida@freebsd.org>, Kris Kennaway <kris@obsecurity.org> Subject: Re: [PATCH]: fdalloc optimization Message-ID: <62870.1124699921@phk.freebsd.dk> In-Reply-To: Your message of "Mon, 22 Aug 2005 10:33:20 %2B0200." <20050822083320.GA32668@stud.fit.vutbr.cz>
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In message <20050822083320.GA32668@stud.fit.vutbr.cz>, Divacky Roman writes: > N Min Max Median Avg Stddev >x 100 39957 959570 41444 87169.69 201011.84 >+ 100 37786 962107 38766 66353.09 158258.74 >No difference proven at 95.0% confidence > >anyway - commenting out duplicate code MUST speed it up, maybe insignificantly >but still ;) It used to be that life was that simple, but with three levels of caches and deep pipelines it isn't anymore. But taken from the other side: you can also read this as your patch does no damage to performance, so if code clarity is improved (havn't looked at your patch myself) then that would be another good reason. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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