asp.net简单性能计数器---老赵版改良

public static class CodeTimer
    {
        private static bool isQueryThreadCycleTime = false;

        public static void Initialize()
        {
            Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.High;
            Thread.CurrentThread.Priority = ThreadPriority.Highest;
            if (Environment.OSVersion.Platform == PlatformID.Win32NT && Environment.OSVersion.Version.Major >= 6)
            {
                isQueryThreadCycleTime = true;
            }
            Time("", 1, () => { });
        }

        public static void Time(string name, int iteration, Action action)
        {
            if (String.IsNullOrEmpty(name)) return;

            // warm up
            action();

            // 1.
            ConsoleColor currentForeColor = Console.ForegroundColor;
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.WriteLine(name);

            // 2.
            GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced);
            int[] gcCounts = new int[GC.MaxGeneration + 1];
            for (int i = 0; i <= GC.MaxGeneration; i++)
            {
                gcCounts[i] = GC.CollectionCount(i);
            }

            // 3.
            Stopwatch watch = new Stopwatch();
            watch.Start();
            ulong cycleCount = GetCycleCount();
            for (int i = 0; i < iteration; i++) action();
            ulong cpuCycles = GetCycleCount() - cycleCount;
            watch.Stop();

            // 4.
            Console.ForegroundColor = currentForeColor;
            Console.WriteLine("tTime Elapsed:t" + watch.ElapsedMilliseconds.ToString("N0") + "ms");
            Console.WriteLine("tCPU Cycles:t" + cpuCycles.ToString("N0"));

            // 5.
            for (int i = 0; i <= GC.MaxGeneration; i++)
            {
                int count = GC.CollectionCount(i) - gcCounts[i];
                Console.WriteLine("tGen " + i + ": tt" + count);
            }

            Console.WriteLine();
        }

        private static ulong GetCycleCount()
        {
            ulong cycleCount = 0;
            if (isQueryThreadCycleTime)
            {
                QueryThreadCycleTime(GetCurrentThread(), ref cycleCount);
            }
            else
            {
                ulong l;
                ulong kernelTime, userTimer;
                GetThreadTimes(GetCurrentThread(), out l, out l, out kernelTime,
                  out userTimer);
                cycleCount = kernelTime + userTimer;
            }

            return cycleCount;
        }

        [DllImport("kernel32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool QueryThreadCycleTime(IntPtr threadHandle, ref ulong cycleTime);

        [DllImport("kernel32.dll")]
        static extern IntPtr GetCurrentThread();

        [DllImport("kernel32.dll", SetLastError = true)]
        static extern bool GetThreadTimes(IntPtr hThread, out ulong lpCreationTime,
           out ulong lpExitTime, out ulong lpKernelTime, out ulong lpUserTime);
    }