LayoutTests/perf/typing-at-end-of-line.html - WebKit - Git at Google

 <body>
 <script src="../resources/magnitude-perf.js"></script>
 <script>
 document.designMode = 'on';

 function placeSelectionAfterFirstBr()
 {
     var children = document.body.childNodes;
     for (var i = 0, len = children.length; i < len; i++) {
         if (children[i].localName == 'br') {
             window.getSelection().setBaseAndExtent(document.body, i, document.body, i);
             return;
         }
     }
 }

 function setupFunction(magnitude)
 {
     document.body.innerHTML = new Array(magnitude + 1).join('a<br>');
     placeSelectionAfterFirstBr();
 }

 function test(magnitude)
 {
     if (window.eventSender)
         eventSender.keyDown('z');
 }

 Magnitude.description("Tests that typing at the end of a line where the line-breaks are all BRs is linear in the number of lines.");
 Magnitude.run(setupFunction, test, Magnitude.LINEAR);
 </script>
 </body>
	<body>
	<script src="../resources/magnitude-perf.js"></script>
	<script>
	document.designMode = 'on';

	function placeSelectionAfterFirstBr()
	{
	var children = document.body.childNodes;
	for (var i = 0, len = children.length; i < len; i++) {
	if (children[i].localName == 'br') {
	window.getSelection().setBaseAndExtent(document.body, i, document.body, i);
	return;
	}
	}
	}

	function setupFunction(magnitude)
	{
	document.body.innerHTML = new Array(magnitude + 1).join('a<br>');
	placeSelectionAfterFirstBr();
	}

	function test(magnitude)
	{
	if (window.eventSender)
	eventSender.keyDown('z');
	}

	Magnitude.description("Tests that typing at the end of a line where the line-breaks are all BRs is linear in the number of lines.");
	Magnitude.run(setupFunction, test, Magnitude.LINEAR);
	</script>
	</body>