I guess it is at least useful to teach people that performance isn't one dimensional. Most people don't measure performance in MFLOPS, for example. Relative to

I guess it is at least useful to teach people that performance isn't one dimensional. Most people don't measure performance in MFLOPS, for example. Relative to the amount of code in the world there are vanishingly few loops which have this kind of 10x speedup just waiting for the right tuning.