--- a/mercurial/revset.py	Thu Oct 02 18:25:37 2014 -0500
+++ b/mercurial/revset.py	Tue Sep 30 23:36:57 2014 -0500
@@ -2444,6 +2444,20 @@
             if cond(x):
                 yield x
 
+    @property
+    def fastasc(self):
+        it = self._subset.fastasc
+        if it is None:
+            return None
+        return lambda: self._iterfilter(it())
+
+    @property
+    def fastdesc(self):
+        it = self._subset.fastdesc
+        if it is None:
+            return None
+        return lambda: self._iterfilter(it())
+
     def __and__(self, x):
         return lazyset(self, x.__contains__)