Inada Naoki <songofaca...@gmail.com> added the comment:
To reduce code size, I am considering to remove clone_combined_dict. I will check how PyDict_Copy() is performance critical. This is microbenchmark result of d.copy() and dict(d). $ ./python -m pyperf timeit --compare-to ./python-master -s 'd=dict.fromkeys(range(1000))' -- 'd.copy()' python-master: ..................... 4.36 us +- 0.07 us python: ..................... 5.96 us +- 0.10 us Mean +- std dev: [python-master] 4.36 us +- 0.07 us -> [python] 5.96 us +- 0.10 us: 1.37x slower (+37%) $ ./python -m pyperf timeit --compare-to ./python-master -s 'd=dict.fromkeys(range(1000))' -- 'dict(d)' python-master: ..................... 21.6 us +- 0.2 us python: ..................... 6.01 us +- 0.09 us Mean +- std dev: [python-master] 21.6 us +- 0.2 us -> [python] 6.01 us +- 0.09 us: 3.59x faster (-72%) ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue41431> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
