Oscar Benjamin wrote: > $ cat tee.py > #!/usr/bin/env python > > import sys > from itertools import tee > > items = iter(range(int(sys.argv[1]))) > > while True: > for x in items: > items, discard = tee(items) > break > else: > break > > print(x) > > $ time py -3.3 ./tee.py 100000000 > 99999999 > > real 1m47.711s > user 0m0.015s > sys 0m0.000s > > While running the above python.exe was using 6MB of memory (according > to Task Manager). I believe this is because tee() works as follows > (which I made up but it's how I imagine it).
[...] > However, when I ran the above script on Python 2.7 it did consume > massive amounts of memory (1.6GB) and ran slower so maybe this depends > on optimisations that were introduced in 3.x. Did you use xrange()? -- https://mail.python.org/mailman/listinfo/python-list
