Issue #12080: Fix a performance issue in Decimal._power_exact that causes some corner-case Decimal.__pow__ calls to take an unreasonably long time.
diff --git a/Misc/NEWS b/Misc/NEWS
index e277eb9..81877f8 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -184,6 +184,9 @@
Library
-------
+- Issue #12080: Fix a Decimal.power() case that took an unreasonably long time
+ to compute.
+
- Issue #12221: Remove __version__ attributes from pyexpat, pickle, tarfile,
pydoc, tkinter, and xml.parsers.expat. This were useless version constants
left over from the Mercurial transition