using System;

using System.Diagnostics;

using System.Runtime.CompilerServices;

​

public class Program

{

    // Disabled compiler optimizations to avoid the compiler potentially optimizing away certain paths

    [MethodImpl(MethodImplOptions.NoOptimization)]

    public static void Main()

    {

        int iterations = 5000000;

​

        // Test using datetime.now

        {

            var date = DateTime.UtcNow.AddHours(DateTime.UtcNow.Second);

​

            var now = DateTime.UtcNow;

​

            for (int i = 0; i < iterations; i++)

            {

                if (date == DateTime.Now)

                    Console.WriteLine("it is!");

            }

            Console.WriteLine($"Done executing {iterations} iterations using datetime.now. It took {(DateTime.UtcNow - now).TotalSeconds} seconds");

        }

​

        // Test using datetime.utcnow

        {

            var date = DateTime.UtcNow.AddHours(DateTime.UtcNow.Second);

​

            var now = DateTime.UtcNow;

​

            for (int i = 0; i < iterations; i++)

            {

                if (date == DateTime.UtcNow)

                    Console.WriteLine("it is!");

            }

            Console.WriteLine($"Done executing {iterations} iterations using datetime.utcnow. It took {(DateTime.UtcNow - now).TotalSeconds} seconds");

        }

​

        // Test using stopwatch

        {

            Stopwatch sw = new Stopwatch();

            sw.Start();

​

            var now = DateTime.UtcNow;

            var ticks = DateTime.UtcNow.Ticks;

​

            for (int i = 0; i < iterations; i++)

            {

                if (sw.ElapsedTicks == ticks)

                    Console.WriteLine("it is!");

            }

            Console.WriteLine($"Done executing {iterations} iterations using stopwatch. It took {(DateTime.UtcNow - now).TotalSeconds} seconds");

        }

    }

}