Arkadiusz Bulski wrote: > Thanks, > timeit gives `not any(key)` same performance as `sum(key)==0`.
Then you did not feed it the "right" data $ python3 -m timeit -s 'key = b"x" + bytes(10**6)' 'sum(key)' 100 loops, best of 3: 15.7 msec per loop $ python3 -m timeit -s 'key = b"x" + bytes(10**6)' 'not any(key)' 10000000 loops, best of 3: 0.168 usec per loop While sum() always has to touch every byte any() can stop at the first non- nul byte. > niedz., 1 kwi 2018 o 21:03 użytkownik Kirill Balunov < > kirillbalu...@gmail.com> napisał: > >> 2018-04-01 20:55 GMT+03:00 Arkadiusz Bulski <arek.bul...@gmail.com>: >> >>> What would be the most performance efficient way of checking if a bytes >>> is all zeros? >> >> >> Try `not any(key)` ;) -- https://mail.python.org/mailman/listinfo/python-list
