Skip Montanaro added the comment: I'm completely unqualified to offer a concrete, expert opinion here, but it seems like defaulting _maxwidth to 1L<<52 should work. I have no idea of the resulting performance implications though.
>>> for bpf in (45, 46, 47, 48, 49, 50, 51, 52, 53): ... print bpf, ... print sum(randrange(2**53 * 2//3, _maxwidth=1L<<bpf) % 2 for i in xrange(1000000)) / 1000000.0, ... print sum(randrange(2**52 * 2//3, _maxwidth=1L<<bpf) % 2 for i in xrange(1000000)) / 1000000.0 ... 45 0.499959 0.500144 46 0.501622 0.500371 47 0.500257 0.499692 48 0.499567 0.499942 49 0.499789 0.50028 50 0.499882 0.500488 51 0.500479 0.50006 52 0.500553 0.500234 53 0.33275 0.500296 ---------- nosy: +skip.montanaro _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue23974> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
