Add build option for faster loop execution.
diff --git a/Misc/NEWS b/Misc/NEWS
index 997a49a..b67420b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -1042,6 +1042,11 @@
Build
-----
+- Add a FAST_LOOPS build option that speeds-up looping by trading away
+ periodic threadstate and signal checking in tight loops. By default,
+ this option is turned-off. It should only be enabled in debugged,
+ performance critical applications.
+
- Patch #786737: Allow building in a tree of symlinks pointing to
a readonly source.