Issue #3873: Speed up unpickling from file objects which have a peek()
method.
diff --git a/Misc/NEWS b/Misc/NEWS
index 597f76b..44b7b46 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -13,6 +13,9 @@
 Library
 -------
 
+- Issue #3873: Speed up unpickling from file objects which have a peek()
+  method.
+
 - Issue #10075: Add a session_stats() method to SSLContext objects.
 
 - Issue #9948: Fixed problem of losing filename case information.