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                # 計算時間開銷 通過 time() 方法可以啟動一個計時器。你必須輸入一個字符串來識別時間的標記。當你要結束計算的時候,使用 timeEnd() 方法,并且傳遞一個相同的字符串給構造器。控制臺會在 timeEnd() 方法結束的時候,記錄下標簽以及時間的花銷。 關于 JavaScript 執行時間的示例代碼以及輸出: 示例代碼: ~~~ console.time("Array initialize"); var array= new Array(1000000); for (var i = array.length - 1; i >= 0; i--) { array[i] = new Object(); }; console.timeEnd("Array initialize"); ~~~
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