Hi Victor, On 17 May 2016 at 23:11, Victor Stinner <victor.stin...@gmail.com> wrote: > with PYTHONHASHSEED=1 to test the same hash function. A more generic > solution is to use multiple processes to test multiple hash seeds to > get a better uniform distribution.
What you say in the rest of the mail just shows that this "generic solution" should be applied not only to PYTHONHASHSEED, but also to other variables that seem to introduce deterministic noise. You've just found three more: the locale, the size of the command line, and the working directory. I guess the mere size of the environment also plays a role. So I guess, ideally, you'd run a large number of times with random values in all these parameters. (In practice it might be enough to run a smaller fixed number of times with known values in the parameters.) A bientôt, Armin. _______________________________________________ Speed mailing list Speed@python.org https://mail.python.org/mailman/listinfo/speed
