List methods

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: radarhere

docs/releasenotes/12.3.0.rst

@@ -123,3 +123,7 @@ Performance improvements
 ^^^^^^^^^^^^^^^^^^^^^^^^
 
 A number of changes have been made to optimize the use of C when manipulating images.
+This improves performance by up to 5.6 times of ``Image``'s
+``alpha_composite``, ``fill``, ``filter``, ``getchannel``, ``linear_gradient``,
+``matrix``, ``merge``, ``negative``, ``putalpha``, ``quantize``,
+``radial_gradient``, ``resample``, ``split``, and ``ImageChops`` operations.