In message <mtu3duo4lu9.fsf@contents-vnder-pressvre.mit.edu>, Nathan J. William
s writes:
>Out of order execution isn't wacky at all these days, and Intel didn't
>come up with it...

No, but it is (according to a guy I know, who does IA32 architecture work)
the major win of the PPro.  :)

>In general, I'd be a lot more careful before claiming that
>out-of-order execution (or any other single architectural feature,
>really) is the killer difference between a PPro-family chip and a
>21164.

It's probably not the only one, but it was apparently significant.

-s