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typing.NewType docs: the future performance improvements are now in the past #105354

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Jun 7, 2023
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typing.NewType docs: the future performance improvements are now in the past #105354

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10 changes: 7 additions & 3 deletions Doc/library/typing.rst
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Expand Up @@ -236,9 +236,13 @@ See :pep:`484` for more details.
.. versionadded:: 3.5.2

.. versionchanged:: 3.10
``NewType`` is now a class rather than a function. There is some additional
runtime cost when calling ``NewType`` over a regular function. However, this
cost will be reduced in 3.11.0.
``NewType`` is now a class rather than a function. As a result, there is
some additional runtime cost when calling ``NewType`` over a regular
function.

.. versionchanged:: 3.11
The performance of calling ``NewType`` has been restored to its level in
Python 3.9.


Callable
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