C#获取程序运行时间

一、第一种方法利用System.DateTime.Now

static void Main(string[] args)
{
    DateTime beginTime = DateTime.Now;            //获取开始时间  
    System.Threading.Thread.Sleep(5000);          //延时5秒
    DateTime endTime = DateTime.Now;              //获取结束时间  
    TimeSpan oTime = endTime.Subtract(beginTime); //求时间差的函数  
 
    //输出运行时间。  
    Console.WriteLine("程序的运行时间：{0} 秒", oTime.TotalSeconds);
    Console.WriteLine("程序的运行时间：{0} 毫秒", oTime.TotalMilliseconds);
 
    Console.ReadLine();
}

二、用Stopwatch类(System.Diagnostics)

public static void SubTest()
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            //Shuffle(a) is the function you want to test.
            int[] a = new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 };
            Shuffle(a);
            sw.Stop();
            TimeSpan ts = sw.Elapsed;
            Console.WriteLine("DateTime costed for Shuffle function is: {0}ms", ts.TotalMilliseconds);
        }