diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_1/jit/regress-451974-02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_1/jit/regress-451974-02.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,66 @@
+// |reftest| skip -- bogus perf test (bug 540512)
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 451974;
+var summary = 'TM: loops with anon functions should not be slower with jit enabled';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  var chars = '0123456789abcdef';
+  var size = 10000;
+  var mult = 1000;
+  var densearray = [];
+  var lsize = size;
+
+  while (lsize--) 
+  { 
+    densearray.push(chars); 
+  }
+
+  function loop()
+  {
+    var start = new Date();
+
+    for (var a = 0; a < mult; a++) 
+    {
+      var f = (function(x){}); 
+      for (var i = 0, len = densearray.length; i < len; i++) 
+      { 
+        f(densearray[i]); 
+      }
+    }
+
+    var stop = new Date();
+    return stop - start;
+  }
+
+  jit(false);
+  var timenonjit = loop();
+  jit(true);
+  var timejit = loop();
+  jit(false);
+
+  print('time: nonjit = ' + timenonjit + ', jit = ' + timejit);
+
+  expect = true;
+  actual = timejit < timenonjit/2;
+
+  reportCompare(expect, actual, summary);
+
+  exitFunc ('test');
+}