Backport inspect.py fix from rev 51803
diff --git a/Misc/NEWS b/Misc/NEWS
index f4dd226..b72e758 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -46,6 +46,9 @@
 Library
 -------
 
+- Patch #1553314: Fix the inspect.py slowdown that was hurting IPython & SAGE
+  by adding smarter caching in inspect.getmodule()
+
 - Fix missing import of the types module in logging.config.
 
 - Patch #1550886: Fix decimal module context management implementation