On Wednesday 29 June 2016 15:51, Lawrence D’Oliveiro wrote: > On Wednesday, June 29, 2016 at 5:26:46 PM UTC+12, Steven D'Aprano wrote: >> BUT in Python 3, the distinction between int and long is gone by dropping >> int and renaming long as "int". So all Python ints are BIGNUMs. > > I don’t understand what the problem is with this. Is there supposed to be > some issue with performance? Because I can’t see it.
If there is a performance hit, it's probably pretty small. It may have been bigger back in Python 3.0 or 3.1. [steve@ando ~]$ python2.7 -m timeit -s "n = 0" "for i in xrange(10000): n += i" 100 loops, best of 3: 1.87 msec per loop [steve@ando ~]$ python3.3 -m timeit -s "n = 0" "for i in range(10000): n += i" 1000 loops, best of 3: 1.89 msec per loop Although setting debugging options does make it pretty slow: [steve@ando ~]$ python/python-dev/3.6/python -m timeit -s "n = 0" "for i in range(10000): n += i" 100 loops, best of 3: 13.7 msec per loop -- Steve -- https://mail.python.org/mailman/listinfo/python-list
