[issue39521] reversed(mylist) much slower on Python 3.8.1 32-bit for Windows

2020-02-01 Thread SilentGhost
SilentGhost added the comment: Your 3.8.0 numbers are similar to 3.8.1 -- components: +Interpreter Core -Build nosy: +SilentGhost, serhiy.storchaka, vstinner ___ Python tracker __

[issue39521] reversed(mylist) much slower on Python 3.8.1 32-bit for Windows

2020-02-01 Thread Stefan Pochmann
New submission from Stefan Pochmann : Somehow `reversed` became much slower than `iter` on lists: List with 1,000 elements: > python -m timeit -s "a = list(range(1000))" "list(iter(a))" 5 loops, best of 5: 5.73 usec per loop > python -m timeit -s "a = list(range(1000))" "list(reversed(a))