[issue45880] Performance regression of Int object operators. (Python 3.11)
Raymond Hettinger
report at bugs.python.org
Tue Nov 23 15:27:23 EST 2021
Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:
Reposting with more careful timing runs. No regression was observed.
$ python3.10 --version
Python 3.10.0
$ python3.10 -m timeit -r 11 -s 'x=5' 'x^3' # Xor with variable
5000000 loops, best of 11: 41.7 nsec per loop
$ python3.10 -m timeit -r 11 -s 'x=5' 'x+3' # Add with variable
10000000 loops, best of 11: 22.7 nsec per loop
$ python3.10 -m timeit -r 11 '5+3' # Constant folded
50000000 loops, best of 11: 7.22 nsec per loop
$ python3.11 --version
Python 3.11.0a2
$ python3.11 -m timeit -r 11 -s 'x=5' 'x^3' # Xor with variable
20000000 loops, best of 11: 19.4 nsec per loop
$ python3.11 -m timeit -r 11 -s 'x=5' 'x+3' # Add with variable
20000000 loops, best of 11: 17 nsec per loop
$ python3.11 -m timeit -r 11 '5+3' # Constant folded
50000000 loops, best of 11: 7.27 nsec per loop
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