1 files changed, 3 insertions, 0 deletions
diff --git a/Misc/NEWS b/Misc/NEWS
index 470fcff..6d8371c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@ What's New in Python 3.2 Beta 1?
 Core and Builtins
 -----------------
 
+- Issue #8685: Speed up set difference ``a - b`` when source set ``a`` is
+  much larger than operand ``b``.  Patch by Andrew Bennetts.
+
 - Issue #10518: Bring back the callable() builtin.
 
 - Issue #8879. Add os.link support for Windows.