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+<html>
+<head>
+  <title>Timeline | A lot of grouped data</title>
+
+  <script src="../../../dist/vis.js"></script>
+  <link href="../../../dist/vis.css" rel="stylesheet" type="text/css" />
+
+  <style type="text/css">
+    body {
+      color: #4D4D4D;
+      font: 10pt arial;
+    }
+  </style>
+  <script src="../../googleAnalytics.js"></script>
+</head>
+
+<body onresize="/*timeline.checkResize();*/">
+<h1>Timeline grouping performance</h1>
+
+<p>
+  Choose a number of items:
+  <a href="?count=100">100</a>,
+  <a href="?count=1000">1000</a>,
+  <a href="?count=10000">10000</a>,
+  <a href="?count=10000">100000</a>
+<p>
+<p>
+  Current number of items: <span id='count'>100</span>
+</p>
+
+<div id="mytimeline"></div>
+
+<script>
+  /**
+   * Get URL parameter
+   * http://www.netlobo.com/url_query_string_javascript.html
+   */
+  function gup( name ) {
+    name = name.replace(/[\[]/,"\\[").replace(/[\]]/,"\\]");
+    var regexS = "[\\?&]"+name+"=([^&#]*)";
+    var regex = new RegExp( regexS );
+    var results = regex.exec( window.location.href );
+    if( results == null )
+      return "";
+    else
+      return results[1];
+  }
+
+  // get selected item count from url parameter
+  var count = (Number(gup('count')) || 1000);
+
+  // create groups
+  var groups = new vis.DataSet([
+    {id: 1, content: 'Truck&nbsp;1'},
+    {id: 2, content: 'Truck&nbsp;2'},
+    {id: 3, content: 'Truck&nbsp;3'},
+    {id: 4, content: 'Truck&nbsp;4'}
+  ]);
+
+  // create items
+  var items = new vis.DataSet();
+
+  var order = 1;
+  var truck = 1;
+  for (var j = 0; j < 4; j++) {
+    var date = new Date();
+    for (var i = 0; i < count/4; i++) {
+      date.setHours(date.getHours() +  4 * (Math.random() < 0.2));
+      var start = new Date(date);
+
+      date.setHours(date.getHours() + 2 + Math.floor(Math.random()*4));
+      var end = new Date(date);
+
+      items.add({
+        id: order,
+        group: truck,
+        start: start,
+        end: end,
+        content: 'Order ' + order
+      });
+
+      order++;
+    }
+    truck++;
+  }
+
+  // specify options
+  var options = {
+    stack: false,
+    start: new Date(),
+    end: new Date(1000*60*60*24 + (new Date()).valueOf()),
+    editable: true,
+    margin: {
+      item: 10, // minimal margin between items
+      axis: 5   // minimal margin between items and the axis
+    },
+    orientation: 'top'
+  };
+
+  // create a Timeline
+  var container = document.getElementById('mytimeline');
+  timeline = new vis.Timeline(container, null, options);
+  timeline.setGroups(groups);
+  timeline.setItems(items);
+
+  document.getElementById('count').innerHTML = count;
+</script>
+
+</body>
+</html>
