[issue39521] reversed(mylist) much slower on Python 3.8 32-bit for Windows

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

I do not see the within-version slowdown on fresh Windows 10, Pro 64, 32-bit debug builds.

3.7: 26.4, 27.0
3.8: 26.8, 27.1  # installed normal 64 bit is 7.4, 7.4
3.9: 30.2, 30.1  # 10% slower

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components: +Windows
nosy: +paul.moore, steve.dower, terry.reedy, tim.golden, zach.ware

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<https://bugs.python.org/issue39521>
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