IsNumber benchmarks

gistfile1.txt

using JsonSrcGen;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System.Text;
using System;
using System.Numerics;
using System.Runtime.InteropServices;
using JsonSrcGen.Runtime;
using System.Runtime.CompilerServices;

namespace Benchmarks
{
    public class IsNumberBenchmark
    {
        string _input = "a1b2c3d4e5f6g7h8i9j0";
        public IsNumberBenchmark()
        {
        }

        static bool IsNumber(char character)
        {
            return character >= '0' && character <= '9';
        }

        [Benchmark]
        public int IsNumberMethod()
        {
            int number = 0;
            foreach(char value in _input)
            {
                if(IsNumber(value)) number++;
            }
            return number;
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static bool IsNumberInline(char character)
        {
            return character >= '0' && character <= '9';
        }

        [Benchmark]
        public int IsNumberInlineMethod()
        {
            int number = 0;
            foreach(char value in _input)
            {
                if(IsNumberInline(value)) number++;
            }
            return number;
        }

        [Benchmark]
        public int SwitchStatement()
        {
            int number = 0;
            foreach(char value in _input)
            {
                switch(value)
                {
                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                    case '8':
                    case '9':
                        number++;
                        break;
                }
            }
            return number;
        }

    }
}