EgorBo

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

static class Program
{
    static void Main(string[] args)
    {
        BenchmarkSwitcher.FromAssembly(typeof(MainBenchmarks).Assembly).Run(args);
    }
}

EgorBo

|      Method |        Job |                   Toolchain |      Mean |     Error |    StdDev | Ratio |
|------------ |----------- |----------------------------:|----------:|----------:|----------:|------:|
|     IndexOf | Job-OHKTCB | \Core_Root_Base\corerun.exe | 33.219 ns | 0.0815 ns | 0.0636 ns |  1.00 |
|     IndexOf | Job-QKMCMY | \Core_Root_EGOR\corerun.exe | 16.176 ns | 0.0254 ns | 0.0238 ns |  0.49 |
|             |            |                             |           |           |           |       |
| LastIndexOf | Job-OHKTCB | \Core_Root_Base\corerun.exe | 31.953 ns | 0.0232 ns | 0.0217 ns |  1.00 |
| LastIndexOf | Job-QKMCMY | \Core_Root_EGOR\corerun.exe | 15.704 ns | 0.0374 ns | 0.0312 ns |  0.49 |
|             |            |                             |           |           |           |       |
|    Contains | Job-OHKTCB | \Core_Root_Base\corerun.exe | 27.097 ns | 0.0301 ns | 0.0235 ns |  1.00 |

EgorBo

 Job-PEQKNF : .NET 7.0.0 (42.42.42.42424), X64 RyuJIT

WarmupCount=30

|      Method |                   Toolchain |               source |              str |       Mean |     Error |    StdDev |     Median | Ratio |
|------------ |-----------------------------|--------------------- |----------------- |-----------:|----------:|----------:|-----------:|------:|
|     IndexOf | \Core_Root_Base\corerun.exe | <html(...)html> [60] |          </hhhh> |  50.478 ns | 0.0415 ns | 0.0368 ns |  50.474 ns |  1.00 |
|     IndexOf | \Core_Root_EGOR\corerun.exe | <html(...)html> [60] |          </hhhh> |  15.091 ns | 0.0092 ns | 0.0081 ns |  15.090 ns |  0.30 | 👍
|             |                             |                      |                  |            |           |           |            |       |
| LastIndexOf | \Core_Root_Base\corerun.exe | <html(...)html> [60] |          </hhhh> |  43.979 ns | 0.0783 ns | 0.0732 ns |  43.970 ns |  1.00 |

EgorBo

using System.Diagnostics;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
using System.Text;

public class Prog

EgorBo

using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
using BenchmarkDotNet.Attributes;


//|           Method |         headerName |     Mean |     Error |    StdDev | Ratio |
//|----------------- |------------------- |---------:|----------:|----------:|------:|

EgorBo

using System.Diagnostics;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.Arm;
using System.Runtime.Intrinsics.X86;
using System.Text;
using BenchmarkDotNet.Attributes;

EgorBo

using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
using BenchmarkDotNet.Attributes;


//BenchmarkDotNet=v0.13.1, OS=Windows 10.0.19042.1415 (20H2/October2020Update)
//Intel Core i7-8700K CPU 3.70GHz (Coffee Lake), 1 CPU, 12 logical and 6 physical cores

EgorBo

using System;
using System.IO;

static class Program
{
    static void WL(string str) => File.AppendAllText(@"C:\prj\t.cs", str + Environment.NewLine);

    static void Main()
    {
        string[] values =

EgorBo

using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

public class Program
{
    static ref byte GetRawData(object obj) => 
        ref Unsafe.As<RawData>(obj).Data;

    [StructLayout(LayoutKind.Sequential)]

EgorBo

using System;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using System.Threading;

public interface IInterface1 { IInterface2 GetInterface(); }
public interface IInterface2 { IInterface3 GetInterface(); }
public interface IInterface3 { IInterface4 GetInterface(); }
public interface IInterface4 { void SayHello(); }