[issue30156] PYTHONDUMPREFS segfaults on exit

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Removing this micro-optimization makes attribute access in namedtuple more than 1.5 times slower:

Mean +- std dev: [python.default] 126 ns +- 4 ns -> [python] 200 ns +- 7 ns: 1.58x slower (+58%)

This would be a significant regression.

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nosy: +rhettinger

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<http://bugs.python.org/issue30156>
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