Steven D'Aprano <steve+pyt...@pearwood.info> added the comment:
By the way, it is almost always wrong to write "k for k in iterable" when you can just write "iterable" or "list(iterable)". Here are some micro-benchmarks: [steve ~]$ python3.9 -m timeit -s "from string import ascii_letters" "''.join(k for k in ascii_letters)" 100000 loops, best of 5: 2.3 usec per loop [steve ~]$ python3.9 -m timeit -s "from string import ascii_letters" "''.join([k for k in ascii_letters])" 200000 loops, best of 5: 1.57 usec per loop [steve ~]$ python3.9 -m timeit -s "from string import ascii_letters" "''.join(list(ascii_letters))" 500000 loops, best of 5: 749 nsec per loop [steve ~]$ python3.9 -m timeit -s "from string import ascii_letters" "''.join(ascii_letters)" 500000 loops, best of 5: 737 nsec per loop ---------- nosy: +steven.daprano _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42699> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
