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Fri Sep 1 16:05:12 EDT 2017 · https://mail.python.org/pipermail/python-dev/2017-September/149127.html

On Thu, Aug 31, 2017 at 5:12 PM, Antoine Pitrou <solipsis at pitrou.net> wrote:

> I'm skeptical there are some programs out there that are limited by the
> speed of PyLong inplace additions.
>

indeed, but that could be said about any number of operations.

My question is -- how can the interpreter know if it can alter what is
supposed to be an immutable in-place? If it's used only internally to a
function, the it would be safe, but how to know that?

-CHB

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[Python-Dev] Inplace operations for PyLong objects