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Date: Mon, 27 Mar 2006 14:20:44 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: Nikolas Britton <nikolas.britton@gmail.com>
Message-ID: <20060327192044.GA70891@xor.obsecurity.org>
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Cc: freebsd-stable@freebsd.org
Subject: Re: -march=pentium2 + -mtune=pentium4 faster then -march=pentium4?
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On Mon, Mar 27, 2006 at 01:05:13PM -0600, Nikolas Britton wrote:
> Why does GCC produce faster code using "-march=3Dpentium2
> -mtune=3Dpentium4" on a Pentium 4 chip versus plain -march=3Dpentium4?
>=20
> Try it...
>=20
> CPUTYPE=3Dpentium2
> CFLAGS+=3D -mtune=3Dpentium4
> COPTFLAGS+=3D -mtune=3Dpentium4

Talk to the gcc developers (and provide benchmarks).=20

Kris

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