Add mention of decoding optimizations in the what's new document.

diff --git a/Doc/whatsnew/3.3.rst b/Doc/whatsnew/3.3.rst
index ac01236752338f7fee2ca8bd1eeaad3e263c1891..6fb60afdb9eca2134fadd2631b2a761a322caab9 100644 (file)
--- a/Doc/whatsnew/3.3.rst
+++ b/Doc/whatsnew/3.3.rst
@@ -1260,6 +1260,10 @@ Major performance enhancements have been added:
   * repeating a single ASCII letter and getting a substring of a ASCII strings
     is 4 times faster
 
+* UTF-8 and UTF-16 decoding is now 2x to 4x faster.
+
+  (contributed by Serhiy Storchaka, :issue:`14624` and :issue:`14738`.)
+
 
 Build and C API Changes
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