using System;
using System.Text;

namespace MyCompiler
{
    public static class Program
    {
        public static void Main(string[] args)
        {
            // build
            var b_run = DateTime.Now;

            for (var i = 0; i <= 4000000; ++i)
            {
                var builder = new StringBuilder();

                builder.Append("hello world ");
                builder.Append("sdf");
                builder.Append(" v1");

                if (builder.ToString() != "hello world sdf v1")
                {
                    throw new Exception("b_err");
                }
            }
            
            var b_end = DateTime.Now;
            
            // str
            var s_run = DateTime.Now;

            for (var i = 0; i <= 4000000; ++i)
            {
                var str = "hello world {HS} v1";
                var res = str.Replace("{HS}", "sdf");

                if (res != "hello world sdf v1")
                {
                    throw new Exception("s_err");
                }
            }
            
            var s_end = DateTime.Now;

            var b_diff = b_end - b_run;
            var s_diff = s_end - s_run;
            
            Console.WriteLine("s_res: " + b_diff.ToString());
            Console.WriteLine("b_res: " + s_diff.ToString());
        }
    }
}