Add changelog entry explaining C to Python class change

zopefoundation · May 4, 2013 · ed1cc8d · ed1cc8d
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diff --git a/CHANGES.rst b/CHANGES.rst
@@ -6,6 +6,10 @@ Changelog
 
 - Add support for `__contains__`.
 
+- Rewrite `Record` class as a new-style pure Python class using `__slots__`
+  instead of an extension class. Surprisingly this is even more memory
+  efficient and results in about two thirds of the original memory usage.
+
 - Rewrite tests as unit tests.
 
 2.13.0 (2010-03-30)