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Tue Oct 17 16:28:33 EDT 2017 · https://mail.python.org/pipermail/python-dev/2017-October/149905.html

2017-10-17 22:25 GMT+02:00 Guido van Rossum <guido at python.org>:
> It takes courage to admit failures like this! I think this is a good call.
> It echoes the experiences with Unladen Swallow and Pyston. Despite what
> people may think, CPython really isn't slow, given the large set of
> constraints on the implementation.

Oh, I still have a long queue of optimization ideas that I want to try
:-) But first, I would like to fix the issue blocking all significant
optimizations: make the stable ABI usable to allow to change major
CPython design choices without breaking C extensions.

https://haypo.github.io/new-python-c-api.html

Sadly, I didn't find time yet to write a proper PEP for that.

Victor

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[Python-Dev] PEP 510 (function specialization) rejected