Add speed-up values to whats new

astropy · Dec 8, 2022 · 45fb953 · 45fb953
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commit 45fb953
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diff --git a/docs/whatsnew/5.2.rst b/docs/whatsnew/5.2.rst
@@ -116,6 +116,9 @@ Performance Improvements
 To help speed up coordinate transformations, several performance improvements
 were implemented, mainly concerning validity checks in ``Angle`` and
 how ``FrameAttributes``  are accessed.
+Performance improvements will vary between different tasks, e.g., the speedup of
+transforming :class:`~astropy.coordinates.AltAz` coordinates to
+:class:`~astropy.coordinates.ICRS` is 5-10 % depending on the number of coordinates.
 
 
 .. _whatsnew-5.2-io-ascii-fixed-width: