[issue39168] Generic type subscription is a huge toll on Python performance

[Guido van Rossum]

Guido van Rossum <guido at python.org> added the comment:

What Python version was used for the timings? If not 3.8, please do over in 3.8.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39168>
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