[Python-Dev] Stop using timeit, use perf.timeit!

[Victor Stinner]

2016-06-10 17:09 GMT+02:00 Paul Moore <p.f.moore at gmail.com>:
> Also, the way people commonly use
> micro-benchmarks ("hey, look, this way of writing the expression goes
> faster than that way") doesn't really address questions like "is the
> difference statistically significant".

If you use the "python3 -m perf compare method1.json method2.json",
perf will checks that the difference is significant using the
is_significant() method:
http://perf.readthedocs.io/en/latest/api.html#perf.is_significant
"This uses a Student’s two-sample, two-tailed t-test with alpha=0.95."

FYI at the beginning, this function comes from the Unladen Swallow
benchmark suite ;-)

We should design a CLI command to do timeit+compare at once.

Victor