On Mon, Mar 6, 2017 at 2:03 PM, Elliot Gorokhovsky <elliot.gorokhov...@gmail.com> wrote: > On Sun, Mar 5, 2017 at 7:50 PM Chris Angelico <ros...@gmail.com> wrote: >> >> >> I would be rather curious to know how frequently a list consists of >> "numbers", but a mix of ints and floats. Does it happen a >> lot in real-world code? >> > > This is of course undecidable to verify statically, so we can't just crawl > PyPI... however, I would argue that using mixed float-int lists is > dangerous, and is more dangerous in Python 3 than in Python 2. So hopefully > this is not very common. However, even if 10% (surely a vast overestimate) > of sort calls are to mixed int-float lists, my patch would still yield a > significant savings on average.
I agree that it's dangerous, but it is still common for programmers and Python alike to treat 10 as functionally identical to 10.0 - although as to being more dangerous in Py3, that's much of a muchness (for instance, the single-slash division operator in Py2 can potentially truncate, but in Py3 it's always going to give you a float). But, fair point. I very much doubt it's as high as 10%, so yeah, that would be advantageous. Also, the performance hit is so small, and even that is in the very worst case (a homogeneous list with one different type at the end). I like changes that make stuff run faster. ChrisA _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
