[issue38477] magiccube2x2 permutations 28% slower with Python 3.8.0rc1 vs 3.7

[Inada Naoki]

Inada Naoki <songofacandy at gmail.com> added the comment:

I can not confirm performance regression in 3.8.0.

$ time ~/pyenv/versions/3.7.3/bin/python permutations2x2 --max_depth 6 | egrep "^# Total_Time" ; time ~/pyenv/versions/3.8.0/bin/python permutations2x2 --max_depth 6 | egrep "^# Total_Time"
# Total_Time: 50.24

real    0m50.665s                                                                                                                                                                                                                                                             user    0m49.729s
sys     0m4.354s
# Total_Time: 47.97

real    0m48.502s
user    0m47.380s
sys     0m4.506s

I suspect that this is a binary specific issue.

Would you try "perf record python ..."?

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