Michele Simionato <michele.simionato <at> gmail.com> writes:
Finally I did some timing of code like this::
from itertools import imap Point = namedtuple('Point x y'.split())
lst = [(i, i*i) for i in range(500)]
def with_imap(): for _ in imap(Point, lst): pass
def with_star(): for _ in (Point(*t) for t in lst): pass
and as expected the performances are worse with the * notation
BTW, I take back this point. It is true that the generation expression is slower, but the direct equivalent of imap is starmap and using that I don't see a significant difference in execution times. So it seems that starmap is smart enough to avoid unnecessary tuple unpacking (as you probably know ;-). I still don't like for a subclass to have an incompatible signature with the parent class, but that's just me.