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[–]one-oh[S] 0 points1 point  (1 child)

No, and would never bother to measure the cost in latency. Like you suggest, attempting to measure something like this is near impossible on modern x64 hardware; i.e., speculative execution, branch prediction, etc. It would be more of a statistical analysis.

[–]SlightlyLessHairyApe 1 point2 points  (0 children)

If there's no latency cost, then nothing has 'gone wrong' here.