Hi Armin,
On Tue, Apr 26, 2016 at 10:56 AM, Armin Rigo <ar...@tunes.org> wrote: > Hi, > > On 25 April 2016 at 08:25, Maciej Fijalkowski <fij...@gmail.com> wrote: > > The problem with disabled ASLR is that you change the measurment from > > a statistical distribution, to one draw from a statistical > > distribution repeatedly. There is no going around doing multiple runs > > and doing an average on that. > > You should mention that it is usually enough to do the following: > instead of running once with PYTHONHASHSEED=0, run five or ten times > with PYTHONHASHSEED in range(5 or 10). In this way, you get all > benefits: not-too-long benchmarking, no randomness, but still some > statistically relevant sampling. > note that here there are two sources of "randomness": one is PYTHONHASHSEED (which you can control with the env variable), the other is ASLR which, AFAIK, you cannot control in the same fine way: you can only either enable or disable it.
_______________________________________________ Speed mailing list Speed@python.org https://mail.python.org/mailman/listinfo/speed
