[Python-Dev] Stop using timeit, use perf.timeit! (original) (raw)

Victor Stinner victor.stinner at gmail.com
Fri Jun 10 12:09:02 EDT 2016

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

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