--- a/contrib/perf.py	Mon Jan 02 11:50:17 2017 -0800
+++ b/contrib/perf.py	Mon Jan 02 13:00:16 2017 -0800
@@ -34,7 +34,6 @@
     extensions,
     mdiff,
     merge,
-    revlog,
     util,
 )
 
@@ -989,7 +988,7 @@
                 chunkstart += (rev + 1) * iosize
             chunklength = length(rev)
             b = buffer(data, chunkstart - offset, chunklength)
-            revlog.decompress(b)
+            r.decompress(b)
 
     def dopatch(text, bins):
         if not cache: