[issue31671] IntFlag makes re.compile slower

[Serhiy Storchaka]

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

It makes sense to report the performance gain only in comparison with the previous released version. I expect that re compiling is slower in 3.7 due to new features and optimizations. Generating more optimal code takes a time.

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