Sergey Fedoseev <fedoseev.ser...@gmail.com> added the comment:
I added similar patch that replaces get_small_int() with macro version, since it also induces unnecessary casts and makes machine code less efficient. Example assembly can be checked at https://godbolt.org/z/1SjG3E. This change produces tiny, but measurable speed-up for handling small ints: $ python -m pyperf timeit -s "from collections import deque; consume = deque(maxlen=0).extend; r = range(256)" "consume(r)" --compare-to=../cpython-master/venv/bin/python --duplicate=1000 /home/sergey/tmp/cpython-master/venv/bin/python: ..................... 1.03 us +- 0.08 us /home/sergey/tmp/cpython-dev/venv/bin/python: ..................... 973 ns +- 18 ns Mean +- std dev: [/home/sergey/tmp/cpython-master/venv/bin/python] 1.03 us +- 0.08 us -> [/home/sergey/tmp/cpython-dev/venv/bin/python] 973 ns +- 18 ns: 1.05x faster (-5%) ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38015> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
