OrdinalIgnoreCase .NET 7 v .NET 8 benchmarks

Benchmarks.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFrameworks>net7.0;net8.0</TargetFrameworks>
    <ImplicitUsings>disable</ImplicitUsings>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="BenchmarkDotNet" Version="0.13.3.2064" />
  </ItemGroup>

</Project>

Program.cs

using BenchmarkDotNet.Running;

internal class Program
{
    private static void Main(string[] args)
    {
        //choose on command line from multiple benchmarks
        BenchmarkSwitcher.FromAssembly(typeof(Program).Assembly).Run();
    }
}

StringCompareBenchmarks.cs

using System.Collections.Generic;
using System;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Columns;
using BenchmarkDotNet.Configs;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Reports;

namespace BenchmarkDotNet.Samples
{
    [Config(typeof(Config))]
    [HideColumns(Column.Job, Column.RatioSD, Column.AllocRatio)]
    [SimpleJob(RuntimeMoniker.Net70, baseline: true)]
    [SimpleJob(RuntimeMoniker.Net80)]
    public class StringCompareBenchmarks
    {
        [Benchmark]
        [ArgumentsSource(nameof(TestData))]
        public bool EqualsIgnoreCase(string s1, string s2) =>
            s1.Equals(s2, StringComparison.OrdinalIgnoreCase);

        public static IEnumerable<object[]> TestData()
        {
            yield return new object[]
           {
                @"dotnet",
                @"dotNet",
           };

            yield return new object[]
            {
                @"Dave Callan",
                @"dave callan",
            };

            yield return new object[]
            {
                @"Hi!", // 3 chars (to make sure overhead is not big)
                @"HI!",
            };

            yield return new object[]
            {
                @"hello!!!", // 8 chars (switches to SIMD)
                @"HELLO!!!",
            };

            yield return new object[]
            {
                @"hello world", // 11 chars (1xV128 + trailing elements)
                @"HELLO WORLD",
            };

            yield return new object[]
            {
                @"C:\prj\runtime-main\src\coreclr\CMakeLists.txt", // 46 chars (5xV128 + trailing elements)
                @"C:\prj\runtime-main\src\CORECLR\CMakeLists.txt",
            };

            yield return new object[]
            {
                @"Good bug reports make it easier for maintainers to verify and root cause the underlying problem. The better a bug report, the faster the problem will be resolved. Ideally, a bug report should contain the following information:", // 226 chars
                @"GOOD bug reports make it easier for maintainers to verify and root cause the underlying problem. The better a bug report, the faster the problem will be resolved. Ideally, a bug report should contain the following information:",
            };
        }

        private class Config : ManualConfig
        {
            public Config()
            {
                SummaryStyle =
                    SummaryStyle.Default.WithRatioStyle(RatioStyle.Percentage);
            }
        }
    }
}