diff -r ce26928cbe41 -r ab66c1dee405 mercurial/revset.py
--- a/mercurial/revset.py	Fri Aug 28 10:53:55 2015 -0400
+++ b/mercurial/revset.py	Thu Aug 27 17:57:33 2015 -0700
@@ -2885,6 +2885,7 @@
         """True if the set will iterate in descending order"""
         raise NotImplementedError()
 
+    @util.cachefunc
     def min(self):
         """return the minimum element in the set"""
         if self.fastasc is not None:
@@ -2893,6 +2894,7 @@
             raise ValueError('arg is an empty sequence')
         return min(self)
 
+    @util.cachefunc
     def max(self):
         """return the maximum element in the set"""
         if self.fastdesc is not None: