[issue43420] Optimize rational arithmetics

[Tim Peters]

Tim Peters <tim at python.org> added the comment:

Issue 21922 lists several concerns, and best I know they all still apply. As a practical matter, I expect the vast bulk of core Python developers would reject a change that sped large int basic arithmetic by a factor of a billion if it slowed down basic arithmetic on native machine-size ints by even half a percent.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43420>
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