Sergey Fedoseev <fedoseev.ser...@gmail.com> added the comment:
Previous benchmarks results were obtained with non-LTO build. Here are results for LTO build: $ python -m perf timeit -s "from itertools import repeat; _len = repeat(None, 0).__length_hint__" "_len()" --compare-to=../cpython-master/venv/bin/python --duplicate=1000 /home/sergey/tmp/cpython-master/venv/bin/python: ..................... 14.9 ns +- 0.2 ns /home/sergey/tmp/cpython-dev/venv/bin/python: ..................... 13.1 ns +- 0.5 ns Mean +- std dev: [/home/sergey/tmp/cpython-master/venv/bin/python] 14.9 ns +- 0.2 ns -> [/home/sergey/tmp/cpython-dev/venv/bin/python] 13.1 ns +- 0.5 ns: 1.13x faster (-12%) $ python -m perf timeit -s "from itertools import repeat; _len = repeat(None, 2**10).__length_hint__" "_len()" --compare-to=../cpython-master/venv/bin/python --duplicate=1000 /home/sergey/tmp/cpython-master/venv/bin/python: ..................... 22.1 ns +- 0.1 ns /home/sergey/tmp/cpython-dev/venv/bin/python: ..................... 20.9 ns +- 0.4 ns Mean +- std dev: [/home/sergey/tmp/cpython-master/venv/bin/python] 22.1 ns +- 0.1 ns -> [/home/sergey/tmp/cpython-dev/venv/bin/python] 20.9 ns +- 0.4 ns: 1.05x faster (-5%) $ python -m perf timeit -s "from itertools import repeat; _len = repeat(None, 2**30).__length_hint__" "_len()" --compare-to=../cpython-master/venv/bin/python --duplicate=1000 /home/sergey/tmp/cpython-master/venv/bin/python: ..................... 23.3 ns +- 0.0 ns /home/sergey/tmp/cpython-dev/venv/bin/python: ..................... 21.6 ns +- 0.1 ns Mean +- std dev: [/home/sergey/tmp/cpython-master/venv/bin/python] 23.3 ns +- 0.0 ns -> [/home/sergey/tmp/cpython-dev/venv/bin/python] 21.6 ns +- 0.1 ns: 1.08x faster (-8%) $ python -m perf timeit -s "from itertools import repeat; _len = repeat(None, 2**60).__length_hint__" "_len()" --compare-to=../cpython-master/venv/bin/python --duplicate=1000 /home/sergey/tmp/cpython-master/venv/bin/python: ..................... 24.4 ns +- 0.1 ns /home/sergey/tmp/cpython-dev/venv/bin/python: ..................... 22.7 ns +- 0.1 ns Mean +- std dev: [/home/sergey/tmp/cpython-master/venv/bin/python] 24.4 ns +- 0.1 ns -> [/home/sergey/tmp/cpython-dev/venv/bin/python] 22.7 ns +- 0.1 ns: 1.08x faster (-7%) ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue37802> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
