hardwareCountersForTwoDifferentRuntimes

Program.cs

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Configs;
using BenchmarkDotNet.Diagnosers;
using BenchmarkDotNet.Environments;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Running;
using BenchmarkDotNet.Toolchains.CsProj;
using System;
using System.Linq;

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

    public class CustomConfig : ManualConfig
    {
        public CustomConfig()
        {
            Add(Job.RyuJitX64.With(Runtime.Core).WithGcConcurrent(true));
            Add(Job.RyuJitX64.With(Runtime.Clr).WithGcConcurrent(true));

            Add(HardwareCounter.CacheMisses);
            Add(MemoryDiagnoser.Default);
        }
    }

    [Config(typeof(CustomConfig))]
    public class Example
    {
        Tuple<int, int>[] arrayOfRef = Enumerable.Repeat(1, 1000000).Select((val, index) => Tuple.Create(val, index)).ToArray();

        [Benchmark]
        public int IterateReferenceTypes()
        {
            int item1Sum = 0, item2Sum = 0;

            var array = arrayOfRef;
            for (int i = 0; i < array.Length; i++)
            {
                item1Sum += array[i].Item1;
                item2Sum += array[i].Item2;
            }

            return item1Sum + item2Sum;
        }
    }
}

results.md

BenchmarkDotNet=v0.10.8, OS=Windows 10 Redstone 1 (10.0.14393)
Processor=Intel Core i7-6600U CPU 2.60GHz (Skylake), ProcessorCount=4
Frequency=2742189 Hz, Resolution=364.6722 ns, Timer=TSC
  [Host]     : Clr 4.0.30319.42000, 64bit RyuJIT-v4.6.1637.0
  Job-DBWACR : Clr 4.0.30319.42000, 64bit RyuJIT-v4.6.1637.0
  Job-MNPYPV : .NET Core 4.6.25211.01, 64bit RyuJIT

Jit=RyuJit  Platform=X64  Concurrent=True  

Method	Runtime	Mean	Error	StdDev	Allocated	CacheMisses/Op
IterateReferenceTypes	Clr	1.657 ms	0.0297 ms	0.0278 ms	0 B	609948
IterateReferenceTypes	Core	1.594 ms	0.0313 ms	0.0335 ms	0 B	617856

sample.csproj

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

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFrameworks>netcoreapp1.1;net46</TargetFrameworks>
  </PropertyGroup>

  <ItemGroup Condition="'$(TargetFramework)' == 'net46'">
    <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.10.8" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="BenchmarkDotNet" Version="0.10.8" />
  </ItemGroup>

</Project>

run it from console with: dotnet run -c Release -f net46