contrib/perf.py

--- a/contrib/perf.py	Sat May 06 11:12:23 2017 -0700
+++ b/contrib/perf.py	Sat May 06 11:15:56 2017 -0700
@@ -854,6 +854,7 @@
 
     def d():
         r = cmdutil.openrevlog(repo, 'perfrevlog', file_, opts)
+        r.clearcaches()
 
         beginrev = startrev
         endrev = _len(r)