我們來看到C#要如何計算程式碼的執行時間呢 ~

有兩種方法分別是 Stopwatch DateTime ~

學習目標: 計算程式碼執行時間的實務

學習難度: ☆☆☆

Stopwatch (StartNew and Stop)

using System;

using System.Diagnostics;

namespace ConsoleApp1
{
    class MainProgram
    {
        static void Main()
        {
            var stopWatch = Stopwatch.StartNew(); //啟動Stopwatch

            for (int i = 0; i < 1000; i++)
            {
                Console.WriteLine("123"+"\n");
            }

            stopWatch.Stop(); //停止Stopwatch

            Console.WriteLine(stopWatch.ElapsedMilliseconds); //印出執行時間(毫秒)
        }
    }
}

Stopwatch (GetTimestamp)

using System;

using System.Diagnostics;

namespace ConsoleApp1
{
    class MainProgram
    {
        static void Main()
        {
            var start = Stopwatch.GetTimestamp(); //紀錄時間(起點)

            for (int i = 0; i < 1000; i++)
            {
                Console.WriteLine("123"+"\n");
            }

            var end = Stopwatch.GetTimestamp(); //紀錄時間(終點)

            Console.WriteLine(end-start); //印出執行時間(毫秒)
        }
    }
}

DateTime

using System;

namespace ConsoleApp1
{
    class MainProgram
    {
        static void Main()
        {
            DateTime start = DateTime.Now; //紀錄時間(起點)

            for (int i = 0; i < 1000; i++)
            {
                Console.WriteLine("123"+"\n");
            }

            DateTime end = DateTime.Now; //紀錄時間(終點)

            TimeSpan timeSpan = (end - start);

            Console.WriteLine(timeSpan.TotalMilliseconds); //印出執行時間(毫秒)
        }
    }
}

參考資料:

https://www.geeksforgeeks.org/how-to-calculate-the-code-execution-time-in-c-sharp/