Date: Tue, 16 Nov 1999 07:23:02 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: mi@aldan.algebra.com Cc: questions@freebsd.org Subject: Re: -lmd's MD5File() Message-ID: <23589.942733382@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 15 Nov 1999 18:35:08 EST." <199911152335.SAA31130@misha.cisco.com>
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In message <199911152335.SAA31130@misha.cisco.com>, Mikhail Teterin writes: >Why does not the function in subject use mmap? In my tests, using mmap >instead of reading the file block at a time gave 17-26% performance >improvement: > > The new method: 135735 microseconds per iteration > The old method: 164525 microseconds per iteration > > The new method: 387283 microseconds per iteration > The old method: 529743 microseconds per iteration > >Should I submit patches, or is there a good reason? Thanks! How would it work for a 5GB file ? -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." FreeBSD -- It will take a long time before progress goes too far! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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