Comment (by Gabriele Bozzola):

If the performance is the one expected, and no one has ever observed this behavior before, I would conclude that it is very likely the problem lies in VTune (or how I used it).

The next time I will profile my code, I will try with the option that you posted in a previous comment and report here in case results persist.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2512/enable-detection-of-attribute-pure