Inada Naoki <songofaca...@gmail.com> added the comment:
> Do you have any explanation of this? I think its because current PyFunction_New tries to get docstring always. See this pull request (lazy-func-doc). https://github.com/python/cpython/pull/28704 lazy-func-doc is faster than co-docstring and remove-docstring in both of with/without docstring. ``` # co-docstring vs lazy-func-doc. $ load-none-co-docstring/release/bin/pyperf timeit --compare-to ./cpython/release/bin/python3 --python-names lazy-func-doc:co-docstring --duplicate=100 "def f(): pass" lazy-func-doc: ..................... 58.6 ns +- 1.6 ns co-docstring: ..................... 60.3 ns +- 2.0 ns Mean +- std dev: [lazy-func-doc] 58.6 ns +- 1.6 ns -> [co-docstring] 60.3 ns +- 2.0 ns: 1.03x slower $ load-none-co-docstring/release/bin/pyperf timeit --compare-to ./cpython/release/bin/python3 --python-names lazy-func-doc:co-docstring --duplicate=100 "def f(): 'doc'" lazy-func-doc: ..................... 59.6 ns +- 1.1 ns co-docstring: ..................... 62.3 ns +- 1.7 ns Mean +- std dev: [lazy-func-doc] 59.6 ns +- 1.1 ns -> [co-docstring] 62.3 ns +- 1.7 ns: 1.05x slower # remove docstring vs lazy-func-doc $ load-none-remove-docstring/release/bin/pyperf timeit --compare-to ./cpython/release/bin/python3 --python-names lazy-func-doc:remove-docstring --duplicate=100 "def f(): pass" lazy-func-doc: ..................... 58.0 ns +- 1.1 ns remove-docstring: ..................... 60.5 ns +- 1.5 ns Mean +- std dev: [lazy-func-doc] 58.0 ns +- 1.1 ns -> [remove-docstring] 60.5 ns +- 1.5 ns: 1.04x slower $ load-none-remove-docstring/release/bin/pyperf timeit --compare-to ./cpython/release/bin/python3 --python-names lazy-func-doc:remove-docstring --duplicate=100 "def f(): 'doc'" lazy-func-doc: ..................... 59.9 ns +- 2.3 ns remove-docstring: ..................... 63.5 ns +- 1.5 ns Mean +- std dev: [lazy-func-doc] 59.9 ns +- 2.3 ns -> [remove-docstring] 63.5 ns +- 1.5 ns: 1.06x slower ``` Note that this benchmark runs on my MacBook. Results may be bit unstable, although I don't touch anything (especially, browser) during the run. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue36521> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
