标题: 图片不存在对页面加载速度的影响

作者: dnawo

日期: 2008-12-22 10:20 AM

分类: 其他

内容: 复制内容到剪贴板程序代码<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>测试加载</title>
</head>
<body>
<script type="text/javascript">
var a = (new Date()).getTime()
window.onload = function(){
    var b = (new Date()).getTime();
    alert(b-a);
}
</script>
<img src="http://www.mzwu123.com/images/01.jpg" />
<img src="http://www.mzwu123.com/images/02.jpg" />
<img src="http://www.mzwu123.com/images/03.jpg" />
<img src="http://www.mzwu123.com/images/04.jpg" />
<img src="http://www.mzwu123.com/images/05.jpg" />
<img src="http://www.mzwu123.com/images/06.jpg" />
<img src="http://www.mzwu123.com/images/07.jpg" />
<img src="http://www.mzwu123.com/images/08.jpg" />
<img src="http://www.mzwu123.com/images/09.jpg" />
<img src="http://www.mzwu123.com/images/10.jpg" />
</body>
</html>
测试10次的结果(mzwu123.com不存在，单位：ms)：
22531
22516
22516
22515
22516
22532
22531
22516
22531
22547
复制内容到剪贴板程序代码<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>测试加载</title>
</head>
<body>
<script type="text/javascript">
var a = (new Date()).getTime()
window.onload = function(){
    var b = (new Date()).getTime();
    alert(b-a);
}
</script>
<img src="http://www.mzwu.com/images/01.jpg" />
<img src="http://www.mzwu.com/images/02.jpg" />
<img src="http://www.mzwu.com/images/03.jpg" />
<img src="http://www.mzwu.com/images/04.jpg" />
<img src="http://www.mzwu.com/images/05.jpg" />
<img src="http://www.mzwu.com/images/06.jpg" />
<img src="http://www.mzwu.com/images/07.jpg" />
<img src="http://www.mzwu.com/images/08.jpg" />
<img src="http://www.mzwu.com/images/09.jpg" />
<img src="http://www.mzwu.com/images/10.jpg" />
</body>
</html>
测试10次结果(mzwu.com存在，单位：ms)：
187
78
140
62
93
110
62
78
125
94

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标题: 图片不存在对页面加载速度的影响

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木子屋

PJBlog3 v3.2.9.518 Inside.

Processed In 0.079 ms