diff -r 0e07c0b5fb1c -r 1aab406be57c mercurial/revlog.py
--- a/mercurial/revlog.py	Sat Sep 07 12:42:46 2013 -0700
+++ b/mercurial/revlog.py	Fri Sep 06 22:57:51 2013 -0700
@@ -863,17 +863,20 @@
         length = self.length
         inline = self._inline
         iosize = self._io.size
-        getchunk = self._getchunk
+        buffer = util.buffer
 
         l = []
         ladd = l.append
 
+        # XXX assume for now that chunkcache is preloaded
+        offset, data = self._chunkcache
+
         for rev in revs:
             chunkstart = start(rev)
             if inline:
                 chunkstart += (rev + 1) * iosize
             chunklength = length(rev)
-            ladd(decompress(getchunk(chunkstart, chunklength)))
+            ladd(decompress(buffer(data, chunkstart - offset, chunklength)))
 
         return l