全域Timestamp管理器 檢測js執行時間

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上載者:User

標籤:http   java   檔案   io   cti   html   代碼   div   

隨手寫了個小工具,主要為了測試不同混淆程度的javascript指令碼的載入速度
1. [代碼]Timestamp.js     

(function() {
 
if (typeof this.Timestamp == ‘undefined‘) {
    /**
     * Global timestamp manager
     * @author Janpoem
     * created at 2011.03.30
     */
    this.Timestamp = (function() {
 
        var pool = {
            ‘page_init‘: new Date()
        };
 
        return {
            add: function(flag) {
                pool[flag] = new Date();
            },
            get: function(flag) {
                return typeof flag == ‘undefined‘ ? pool : (pool[flag] ? pool[flag] : pool);
            },
            diff: function(to, diff) {
                if (!diff)
                    diff = to, to = ‘page_init‘;
                return (pool[to] && pool[diff]) ? pool[diff] - pool[to] : 0;
            }
        }
    }) ();
}
 
}) ();
2. [代碼]實際用例    ?
<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>MooTools Test Page</title>http://www.huiyi8.com/donghua/?
<script type="text/javascript">flash
(function() {
 
// 由於為了測試單獨載入某個指令檔的實際速度,所以該對象的代碼被直接載入寫在頁面中
if (typeof this.Timestamp == ‘undefined‘) {
    /**
     * Global timestamp manager
     * @author Janpoem
     * created at 2011.03.30
     */
    this.Timestamp = (function() {
 
        var pool = {
            ‘page_init‘: new Date()
        };
 
        return {
            add: function(flag) {
                pool[flag] = new Date();
            },
            get: function(flag) {
                return typeof flag == ‘undefined‘ ? pool : (pool[flag] ? pool[flag] : pool);
            },
            diff: function(to, diff) {
                if (!diff)
                    diff = to, to = ‘page_init‘;
                return (pool[to] && pool[diff]) ? pool[diff] - pool[to] : 0;
            }
        }
    }) ();
}
 
}) ();
</script>
<script type="text/javascript" src="all.js" onload="Timestamp.add(‘load_complate‘);"></script>
<script type="text/javascript">
Timestamp.add(‘process_here#1‘);
</script>
</head>
<body>
<div id="mt_test"></div>
<script type="text/javascript">
console.log(
    Timestamp.diff(‘load_complate‘),  // download a script file speed
    Timestamp.diff(‘process_here#1‘), // html parse process here
    Timestamp.diff(‘load_complate‘, ‘process_here#1‘)
);
</script>
</body>
</html>

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