[3.12] typing.NewType docs: the future performance improvements are now in the past (GH-105354) (#105414)

miss-islington · AlexWaygood · web-flow · commit f4969eb315fb · 2023-06-06T20:55:37.000-07:00
`typing.NewType` docs: the future performance improvements are now in the past (GH-105354) (cherry picked from commit 5f65ff0) Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
diff --git a/Doc/library/typing.rst b/Doc/library/typing.rst
@@ -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
