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@@ -0,0 +1,98 @@
+<html>
+<head>
+  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+  <title>qooxdoo &raquo; Demo</title>
+  <link type="text/css" rel="stylesheet" href="../../resource/css/layout.css"/>
+  <!--[if IE]>
+  <link type="text/css" rel="stylesheet" href="../../resource/css/layout_ie.css"/>
+  <![endif]-->
+  <script type="text/javascript" src="../../script/qx.js"></script>
+</head>
+<body>
+  <script type="text/javascript" src="../../script/layout.js"></script>
+
+  <div id="demoDescription">
+    <p>Tests for String Performance. Using cached string instances for concat.</p>
+    <ol>
+      <li>Operator +=</li>
+      <li>Operators = and +</li>
+      <li>Concat function</li>
+      <li>Array Push</li>
+      <li>Array Index</li>
+      <li>StringBuilder Object</li>
+    </ol>
+  </div>
+
+  <script type="text/javascript">
+  qx.core.Init.getInstance().defineMain(function()
+  {
+    var e = "";
+    var a = "a";
+
+    function StringConcatShort(vLoops)
+    {
+      var s = e;
+
+      for (var i=0; i<vLoops; i++) {
+        s += a;
+      };
+    };
+
+    function StringConcatShortAlt(vLoops)
+    {
+      var s = e;
+
+      for (var i=0; i<vLoops; i++) {
+        s = s + a;
+      };
+    };
+
+    function StringConcatMethod(vLoops)
+    {
+      var s = e;
+
+      for (var i=0; i<vLoops; i++) {
+        s=s.concat(a);
+      };
+    };
+
+    function StringConcatArrayPush(vLoops)
+    {
+      var s = [];
+
+      for (var i=0; i<vLoops; i++) {
+        s.push(a);
+      };
+
+      s = s.join(e);
+    };
+
+    function StringConcatArrayAdd(vLoops)
+    {
+      var s = [];
+
+      for (var i=0; i<vLoops; i++) {
+        s[s.length] = a;
+      };
+
+      s = s.join(e);
+    };
+
+    function StringConcatStringBuilder(vLoops)
+    {
+      var s = new qx.type.StringBuilder;
+
+      for (var i=0; i<vLoops; i++) {
+        s.add(a);
+      };
+
+      s = s.get();
+    };
+
+    new qx.dev.TimeTracker(StringConcatShort, StringConcatShortAlt, 
+      StringConcatMethod, StringConcatArrayPush, StringConcatArrayAdd, 
+      StringConcatStringBuilder);
+  });
+  </script>
+</body>
+</html>