1.使用Stopwatch
//实例化一个计时器
Stopwatch watch = new Stopwatch();
//开始计时
watch.Start();//此处为要计算的运行代码
for (int i = 1; i < 1000000; i++) { } // Execute the task to be timed//结束计时
watch.Stop();//获取当前实例测量得出的总运行时间（以毫秒为单位）
string time = watch.ElapsedMilliseconds.ToString();
//说明：Stopwatch提供了几个方法用以控制Stopwatch对象。Start方法开始一个计时操作，Stop方法停止计时。为避免这种情况，在第二次计时前用Reset方法将对象归零
Console.WriteLine("Elapsed: {0}",watch.Elapsed);
Console.WriteLine("In milliseconds: {0}",watch.ElapsedMilliseconds);
Console.WriteLine("In timer ticks: {0}",watch.ElapsedTicks); 2.使用DateTime
DateTime startTime = DateTime.Now;
Console.WriteLine ("Started: {0}", startTime);// Execute the task to be timed
for (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); 3.调用API
[System.Runtime.InteropServices.DllImport("Kernel32.dll")]
static extern bool QueryPerformanceCounter(ref long count);
[System.Runtime.InteropServices.DllImport("Kernel32.dll")]
static extern bool QueryPerformanceFrequency(ref long count);
static void SubTest()
{long count = 0;long count1 = 0;long freq = 0;double result = 0;QueryPerformanceFrequency(ref freq);QueryPerformanceCounter(ref count);for (int i = 0; i < int.MaxValue; i++){ }QueryPerformanceCounter(ref count1);count = count1 - count;result = (double)(count) / (double)freq;Console.WriteLine("QueryPerformanceCounter Time: {0} s", result);Console.ReadKey();
} 4.利用Thread的UserProcessorTime
class Program
{static void Main(string[] args){Timing tobj = new Timing();tobj.startTime();for (int i = 0; i < int.MaxValue; i++){ }tobj.stopTime();Console.WriteLine("Time: " + tobj.Result().TotalSeconds);Console.ReadKey();}
}class Timing
{TimeSpan duration;public Timing(){duration = new TimeSpan(0);}public void stopTime(){duration = Process.GetCurrentProcess().TotalProcessorTime;}public void startTime(){GC.Collect();GC.WaitForPendingFinalizers();}public TimeSpan Result(){return duration;}
}
