long parsing benchmarks

Program.cs

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System;
using System.Globalization;

namespace ConsoleApp6
{
    class Program
    {
        static void Main(string[] args)
        {
            BenchmarkRunner.Run<LongParsingBenchmarks>();
        }
    }

    //[ShortRunJob]
    public class LongParsingBenchmarks
    {
        private readonly string str = "1234567890";
        private long result;
        [Benchmark]
        public void Long_Parse()
        {
            result = long.Parse(str);
        }

        [Benchmark]
        public void Long_TryParse()
        {
            long.TryParse(str, out result);
        }

        [Benchmark]
        public void Long_TryParse_NumberStyles_None()
        {
            long.TryParse(str, NumberStyles.None, CultureInfo.InvariantCulture, out result);
        }

        [Benchmark]
        public void Convert_ToInt64()
        {
            result = Convert.ToInt64(str);
        }

        [Benchmark]
        public void LongParseFast()
        {
            result = LongParseFast(str);
        }

        public static long LongParseFast(ReadOnlySpan<char> value)
        {
            long result = 0;
            for (int i = 0; i < value.Length; i++)
            {
                result = 10 * result + (value[i] - 48);
            }
            return result;
        }
    }
}