Inada Naoki <songofaca...@gmail.com> added the comment:
Microbenchmark for commit cf4f61ce50e07f7ccd3aef991647050c8da058f9. # timeit -s 'd=dict.fromkeys(range(8))' -- 'dict(d)' Mean +- std dev: [master] 311 ns +- 2 ns -> [patched] 144 ns +- 1 ns: 2.16x faster (-54%) # timeit -s 'd=dict.fromkeys(range(1000))' -- 'dict(d)' Mean +- std dev: [master] 21.6 us +- 0.2 us -> [patched] 7.67 us +- 0.09 us: 2.81x faster (-64%) # timeit -s 'd=dict.fromkeys(range(8))' -- '{}.update(d)' Mean +- std dev: [master] 301 ns +- 5 ns -> [patched] 149 ns +- 1 ns: 2.01x faster (-50%) # timeit -s 'd=dict.fromkeys(range(1000))' -- '{}.update(d)' Mean +- std dev: [master] 21.4 us +- 0.2 us -> [patched] 7.64 us +- 0.07 us: 2.80x faster (-64%) ---------- stage: patch review -> _______________________________________ 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