效能分析 之 統計代碼的執行時間

標籤：代碼   lin   ons   tostring   timer   cut   set   i++   統計代碼   

一、System.Diagnostics 命名空間下的 Stopwatch 類

//執行個體化一個計時器Stopwatch watch = new Stopwatch();//開始計時watch.Start();//此處為要計算的運行代碼for (int i = 1; i < 1000000; i++) { }   // Execute the task to be timed//結束計時watch.Stop();//擷取當前執行個體測量得出的總已耗用時間（以毫秒為單位）string time = watch.ElapsedMilliseconds.ToString();//說明：Stopwatch提供了幾個方法用以控制Stopwatch對象。Start方法開始一個計時操作，Stop方法停止計時。為避免這種情況，在第二次計時前用Reset方法將對象歸零 Console.WriteLine("Elapsed: {0}",watch.Elapsed);Console.WriteLine("In milliseconds: {0}",watch.ElapsedMilliseconds);Console.WriteLine("In timer ticks: {0}",watch.ElapsedTicks);

二、DateTime 類

DateTime startTime = DateTime.Now;Console.WriteLine ("Started: {0}", startTime); // Execute the task to be timedfor (int i=1; i < 100000; i++){}  DateTime stopTime = DateTime.Now;Console.WriteLine ("Stopped: {0}", stopTime);TimeSpan elapsedTime = stopTime - startTime;Console.WriteLine ("Elapsed: {0}", elapsedTime);Console.WriteLine ("in hours       :" + elapsedTime.TotalHours);Console.WriteLine ("in minutes     :" + elapsedTime.TotalMinutes);Console.WriteLine ("in seconds     :" + elapsedTime.TotalSeconds);Console.WriteLine ("in milliseconds:" + elapsedTime.TotalMilliseconds);

 

效能分析 之 統計代碼的執行時間