-march=pentium2 + -mtune=pentium4 faster then -march=pentium4?

From: "Nikolas Britton" <nikolas.britton@xxxxxxxxx>
Date: Mon, 27 Mar 2006 13:05:13 -0600

Why does GCC produce faster code using "-march=pentium2
-mtune=pentium4" on a Pentium 4 chip versus plain -march=pentium4?

Try it...

CPUTYPE=pentium2
CFLAGS+= -mtune=pentium4
COPTFLAGS+= -mtune=pentium4

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