[issue37101] Filterer.filter can be rewritten using built-ins just as efficient much more readable

[Vinay Sajip]

Vinay Sajip <vinay_sajip at yahoo.co.uk> added the comment:

I grant that your version is more compact, but I don't find it more readable in general (perhaps it is for very experienced Python developers/developers who like a functional style, but I persoanlly don't think it improves readability).

Since the rationale proposed for making this change is "efficiency", I would like to see some real-world performance numbers to back this up. Can you please provide some quantitative data on the amount of speedup achievable in real-world scenarios?

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<https://bugs.python.org/issue37101>
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