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A benchmark figure should be treated with caution because it

  • A.applies to the peripheral set rather than to the processor core
  • B.may have been compiled with settings the application will not use
  • C.is measured at a temperature no product ever reaches
  • D.is published only by independent laboratories and not by vendors

Answer: B

Optimisation level, library choice and whether the code ran from flash or from RAM all move the number substantially, and vendors quote their best case. A benchmark is a screen rather than a decision, and the honest test is the application's own hot loop.

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