using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace A
{
    struct MyStruct { public string X; public string Y; public string O; }
    class MyClass { public string X; public string Y; public string O; }
 
    class Program
    {
        static void Main(string[] args)
        {
            fooY();
            fooZ();
            Console.ReadKey();
        }
 
        private static void fooY()
        {
            var sw = new System.Diagnostics.Stopwatch();
            sw.Start();
            for (int k = 0; k < 100; k++)
                for (int i = 0; i < 10000; i++)
                {
                    var t = new MyStruct(); t.X = "aaaa"; t.Y = "bbbb"; t.O = t.X + t.Y;
                };
            sw.Stop();
            Console.WriteLine("MyStruct : {0}", sw.ElapsedMilliseconds);
        }
 
        private static void fooZ()
        {
            var sw = new System.Diagnostics.Stopwatch();
            sw.Start();
            for (int k = 0; k < 100; k++)
                for (int i = 0; i < 10000; i++)
            {
                var t = new MyClass(); t.X = "aaaa"; t.Y = "bbbb"; t.O = t.X + t.Y;
            };
            sw.Stop();
            Console.WriteLine("MyClass : {0}", sw.ElapsedMilliseconds);
        }
    }
}
 
 
 

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