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Re: Pentium 4 Optimization Complimenting icc 5.0

From: Richard Henderson <rth at redhat dot com>
To: Joe Buck <jbuck at synopsys dot COM>
Cc: "Walton, Shane" <swalton at dsrnet dot com>, gcc at gnu dot org
Date: Wed, 6 Feb 2002 17:08:59 -0800
Subject: Re: Pentium 4 Optimization Complimenting icc 5.0
References: <33F012255162604984A3F4BDA95C6EC48653C6@mstaex1b.DSRUSI.com> <200202062035.MAA05406@atrus.synopsys.com>

On Wed, Feb 06, 2002 at 12:35:41PM -0800, Joe Buck wrote:
> Intel has been attacked for this, by the way: the P4 often is slower than
> the P3 for code tuned for the P3.

Not just "tuned for p3" -- the P4 is about 20% slower across the
board when similar clock speeds are compared.  The P4 architecture
team inside Intel has taken quite a lot of heat for this.

r~

Follow-Ups:
- Re: Pentium 4 Optimization Complimenting icc 5.0
  - From: Joe Buck

References:
- Pentium 4 Optimization Complimenting icc 5.0
  - From: Walton, Shane
- Re: Pentium 4 Optimization Complimenting icc 5.0
  - From: Joe Buck

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