longouyang/test_setinterval.html

## test_setinterval.html
<html>
<head>

<script type="text/javascript">
var pID;
var i = 0;
var startTime, endTime;

function start_test() {
  i = 0;
  pID = setInterval(update, 1);
  startTime = new Date();
}

function update() {
  i++;
  if(i == 250) {
    end();
  }
}

function end() {
	clearInterval(pID);
    endTime = new Date();
    document.getElementById('result').innerHTML = (endTime-startTime) / 250 + "ms";
}
</script>
</head>
<body>
	This test assesses how fast setInterval() is called.
	<input type="submit" onclick="start_test();" value="Start">
	<div id='result'></div>

</body></html>
	<html>
	<head>

	<script type="text/javascript">
	var pID;
	var i = 0;
	var startTime, endTime;

	function start_test() {
	i = 0;
	pID = setInterval(update, 1);
	startTime = new Date();
	}

	function update() {
	i++;
	if(i == 250) {
	end();
	}
	}

	function end() {
	clearInterval(pID);
	endTime = new Date();
	document.getElementById('result').innerHTML = (endTime-startTime) / 250 + "ms";
	}
	</script>
	</head>
	<body>
	This test assesses how fast setInterval() is called.
	<input type="submit" onclick="start_test();" value="Start">
	<div id='result'></div>

	</body></html>