bpo-37207: Update whatsnews for 3.9 (GH-21337)

diff --git a/Doc/whatsnew/3.9.rst b/Doc/whatsnew/3.9.rst
index 165ce69e59e1dc9e0159bf6fddab3358d7b8cd21..c2db9bc74ccdd6982b00738b654772670a7799ee 100644 (file)
--- a/Doc/whatsnew/3.9.rst
+++ b/Doc/whatsnew/3.9.rst
@@ -685,6 +685,10 @@ in nanoseconds.  The benchmarks were measured on an
 running the macOS 64-bit builds found at
 `python.org <https://www.python.org/downloads/mac-osx/>`_.
 
+* A number of Python builtins (:class:`range`, :class:`tuple`, :class:`set`, :class:`frozenset`, :class:`list`, :class:`dict`)
+  are now sped up by using :pep:`590` vectorcall protocol.
+  (Contributed by Dong-hee Na, Mark Shannon, Jeroen Demeyer and Petr Viktorin in :issue:`37207`.)
+
 
 Deprecated
 ==========