<html>
<head>
<title>test page</title>
<script type='text/javascript'>
<!--
function createTable() {
var t = document.createElement('table');
for (var i = 0; i < 2000; i++) {
var r = t.insertRow();
for (var j = 0; j < 5; j++) {
var c = r.insertCell();
c.innerHTML = i + ',' + j;
}
}
document.getElementById('table1').appendChild(t);
t.setAttribute('border', '1');
}
function createTable2() {
var t = document.createElement('table');
var b = document.createElement('tbody');
for (var i = 0; i < 2000; i++) {
var r = document.createElement('tr');
for (var j = 0; j < 5; j++) {
var c = document.createElement('td');
var m = document.createTextNode(i + ',' + j);
c.appendChild(m);
r.appendChild(c);
}
b.appendChild(r);
}
t.appendChild(b);
document.getElementById('table1').appendChild(t);
t.setAttribute('border', '1');
}
function createTable3() {
var data = '';
data += '<table border=1><tbody>';
for (var i = 0; i < 2000; i++) {
data += '<tr>';
for (var j = 0; j < 5; j++) {
data += '<td>' + i + ',' + j + '</td>';
}
data += '</tr>';
}
data += '</tbody><table>';
document.getElementById('table1').innerHTML = data;
}
function createTable4() {
var data = new Array();
data.push('<table border=1><tbody>');
for (var i = 0; i < 2000; i++) {
data.push('<tr>');
for (var j = 0; j < 5; j++) {
data.push('<td>' + i + ',' + j + '</td>');
}
data.push('</tr>');
}
data.push('</tbody><table>');
document.getElementById('table1').innerHTML = data.join('');
}
function showFunctionRunTime(f) {
var t1 = new Date();
f();
var t2 = new Date();
alert(t2 - t1);
}
//-->
</script>
</head>
<body>
<div id="table1" style="border: 1px solid black">
</div>
<script>
showFunctionRunTime(createTable);
showFunctionRunTime(createTable2);
showFunctionRunTime(createTable3);
showFunctionRunTime(createTable4);
</script>
</body>
</html>
原文连接： http://blog.51cto.com/jeoff/225188