slosd/for-loops.html

## for-loops.html
<!doctype html>
<html>
	<head>
		<title>For loop tests</title>
		<script src="for-loops.js"></script>
	</head>
	<body>
		<script>
			test_forClassic();
			test_forLength();
			test_forShort();
		</script>
	</body>
</html>

## for-loops.js
/* Timer helper functions */
var start;
var end;

function startTimer() {
	start = new Date();
}

function endTimer() {
	end = new Date();
}

function getMilliseconds() {
	return end.getTime() - start.getTime();
}

/* Test parameters */
var elements = 1000000;

/* Test data helper functions */
function getTestData() {
	var a = [];
	for (var i = elements; i >= 0; i--) {
		a[i] = i + 1;
	}
	return a;
}

/* Test cases */
function Process(data) {
	return data * data;
}

function test_forClassic() {
	var a = getTestData();
	startTimer();
	for (var i = 0; i < a.length; i++) {
		Process(a[i]);
	}
	endTimer();
	console.log("Classic for loop: " + getMilliseconds() + "ms");
}

function test_forLength() {
	var a = getTestData();
	startTimer();
	for (var i = 0, len = a.length; i < len; i++) {
		Process(a[i]);
	}
	endTimer();
	console.log("For loop with length cached: " + getMilliseconds() + "ms");
}

function test_forShort() {
	var a = getTestData();
	startTimer();
	for (var i = 0, item; item = a[i++];) {
		Process(item);
	}
	endTimer();
	console.log("For loop with short signature: " + getMilliseconds() + "ms");
}
	<!doctype html>
	<html>
	<head>
	<title>For loop tests</title>
	<script src="for-loops.js"></script>
	</head>
	<body>
	<script>
	test_forClassic();
	test_forLength();
	test_forShort();
	</script>
	</body>
	</html>
	/* Timer helper functions */
	var start;
	var end;

	function startTimer() {
	start = new Date();
	}

	function endTimer() {
	end = new Date();
	}

	function getMilliseconds() {
	return end.getTime() - start.getTime();
	}

	/* Test parameters */
	var elements = 1000000;

	/* Test data helper functions */
	function getTestData() {
	var a = [];
	for (var i = elements; i >= 0; i--) {
	a[i] = i + 1;
	}
	return a;
	}

	/* Test cases */
	function Process(data) {
	return data * data;
	}

	function test_forClassic() {
	var a = getTestData();
	startTimer();
	for (var i = 0; i < a.length; i++) {
	Process(a[i]);
	}
	endTimer();
	console.log("Classic for loop: " + getMilliseconds() + "ms");
	}

	function test_forLength() {
	var a = getTestData();
	startTimer();
	for (var i = 0, len = a.length; i < len; i++) {
	Process(a[i]);
	}
	endTimer();
	console.log("For loop with length cached: " + getMilliseconds() + "ms");
	}

	function test_forShort() {
	var a = getTestData();
	startTimer();
	for (var i = 0, item; item = a[i++];) {
	Process(item);
	}
	endTimer();
	console.log("For loop with short signature: " + getMilliseconds() + "ms");
	}