.NET测试代码效率(时间比较方式)

在这里引入了Kernel32.dll以提高精准度. 代码如下:

 

[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);

[STAThread]
        static void Main(string[] args)
        {
            long count = 0;
            long count1 = 0;
            long freq = 0;
            double result = 0;
            QueryPerformanceFrequency(ref freq);
            QueryPerformanceCounter(ref count);
            //要测试的部分.随意举个例子,测试输出如下int数组所用的时间.----------------------
            int[] array = { 0, 5, 3, 3, 3, 7, 7, 19, 13, 17, 11, 7, 7, 19, 13, 17, 11 };
            foreach (int i in array)
            {
                Console.WriteLine(i);
            }
            //------------------------------------------------------------------------------
            QueryPerformanceCounter(ref count1);
            count = count1 - count;
            result = (double)(count) / (double)freq;
            Console.WriteLine("耗时: {0} 秒", result);
        }