diff -r b09b3eaf9c96 -r 163fa0aea71e contrib/hgperf
--- a/contrib/hgperf	Mon Oct 02 06:52:10 2017 +0100
+++ b/contrib/hgperf	Mon Oct 02 07:18:24 2017 +0100
@@ -94,7 +94,4 @@
 
 dispatch.runcommand = runcommand
 
-for fp in (sys.stdin, sys.stdout, sys.stderr):
-    util.setbinary(fp)
-
 dispatch.run()