Add item
diff --git a/Doc/whatsnew/whatsnew25.tex b/Doc/whatsnew/whatsnew25.tex
index b19b65a..ebb021c 100644
--- a/Doc/whatsnew/whatsnew25.tex
+++ b/Doc/whatsnew/whatsnew25.tex
@@ -2,7 +2,6 @@
\usepackage{distutils}
% $Id$
-% Writing context managers
% The easy_install stuff
% Stateful codec changes
% Fix XXX comments
@@ -1178,8 +1177,9 @@
and as a result sets will use a third less memory and are somewhat faster.
(Implemented by Raymond Hettinger.)
-\item The performance of some Unicode operations has been improved.
-% XXX provide details?
+\item The performance of some Unicode operations, such as
+character map decoding, has been improved.
+% Patch 1313939
\item The code generator's peephole optimizer now performs
simple constant folding in expressions. If you write something like