using System;
using System.Text;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

namespace stackallockTest
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");

            var summary = BenchmarkRunner.Run<BenchClass>();
        }

        public class BenchClass
        {

            [Params(100000)]
            public int N;

            [Benchmark]
            public string BuilderTest()
            {
                StringBuilder builder = new StringBuilder(N);

                for (int i = 0; i < N; i++)
                {
                    builder.Append('a');
                }

                string str3 = builder.ToString();

                return str3;
            }

            [Benchmark]
            public string NewTest()
            {
                char[] buffer2 = new char[N];

                for (int i = 0; i < N; i++)
                {
                    buffer2[i] = 'a';
                }

                string str2 = new string(buffer2);

                return str2;
            }

            [Benchmark]
            public unsafe string StackTest()
            {
                Span<char> buffer = stackalloc char[N];

                for (int i = 0; i < N; i++)
                {
                    buffer[i] = 'a';
                }

                string str = new string(buffer);

                return str;
            }
        }
    }
}