[ccccc0]

I think it's a pretty good idea actually, because with standard deviations (and means, of course) you can run statistical tests to make sure your improvements are statistically significant and not due to chance. I hope the candidate had a chance to explain themselves before he got no-hired.

[maxander]

The candidate is probably now happily working under a manager who doesn’t complain “why are you using your skills? Just [do the simplest thing that occurs to me], you idiot.”

[eftychis]

A lot of managers out there like that unfortunately.

[Fomite]

It also tells you how variable your performance is - for example, do you experience large fluctuations in runtime, and if so, why?