Dennis Lee Bieber <wlfr...@ix.netcom.com> writes: > On Tue, 26 Jul 2022 23:47:59 +0200, Cecil Westerhof <ce...@decebal.nl> > declaimed the following: > > >>The new code: >> from random import SystemRandom >> system_random = SystemRandom() >> index = system_random.randint(0, len(to_try) - 1) >> >>The first two statements are executed once. >>The last statement I think about 75 * 10 ** 6. >> >>So it seems that my first idea of using randbelow was the correct one. >>But if anyone could explain why SystemRandom is so much more >>expensive, I would be interested to know it. >>(Or am I still doing something wrong?) > > What happens with > > system_randint = SystemRandom().randint #no parens > > index = system_randint(...) > > which may remove the method lookup from the repetition.
I had already switched to randrange. This went to 15 minutes from 21 minutes. By removing the method lookup I could shave off another minute. So certainly noteworthy. (Should have thought about it myself.) -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof -- https://mail.python.org/mailman/listinfo/python-list
