C# 计算代码的运行时间

用法

主要通过Stopwatch类来实现...

在开发、调试、测试、分析中非常实用.

Stopwatch sw = new Stopwatch();
sw.Start();
// 某些耗时的计算或任务...
sw.Stop();
var runtime = sw.ElapsedMilliseconds;

实例

新建一个叫做StopwatchDemo控制台应用程序

using System;
using System.Diagnostics;

namespace StopwatchDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("开始计算...");
            Stopwatch sw = new Stopwatch();
            sw.Start();
            int sum = 0;
            for (int i = 0, n = 100 * 10000; i < n; i++)
            {
                sum += i;
            }
            sw.Stop();
            Console.WriteLine("执行百万次累加计算共耗时{0}毫秒", sw.ElapsedMilliseconds);
            Console.WriteLine("累加结果为:{0}", sum);
            Console.ReadKey();
        }
    }
}