Wouldn’t it be great if you could at least kind of understand a computer?
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Over the past 10 years I've done a lot of this, on several in-order and out-of-order versions of each {x86, PPC, ARM}. The OoO cores are consistently easier to optimize for for all 3 archs.
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(Some people say "but with in-order the results are more consistent" and that's not at all true in my experience either. On both the main source of variability is external events and memory access and OoO cores are better not worse at smoothing out the impact of those.)
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