[issue37723] important performance regression on regular expression parsing

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

Indeed, it was not expected that the character set contains hundreds of thousands items. What is its size in your real code?

Could you please show benchmarking results for different implementations and different sizes?

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<https://bugs.python.org/issue37723>
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