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Is performance reduced when executing loops whose uop count is not a multiple of processor width?

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Is performance reduced when executing loops whose uop count is not a multiple of processor width?

Is performance reduced when executing loops whose uop count is not a multiple of processor width?.
I’m wondering how loops of various sizes perform on recent x86 processors, as a function of number of uops.

Here’s a quote from Peter Cordes who raised the issue of non-multiple-of-4 counts in ano…

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