Benchmarking performance of reference versus value tuples

report.md

BenchmarkDotNet=v0.10.3.0, OS=Microsoft Windows NT 6.2.9200.0
Processor=Intel(R) Core(TM) i7-6600U CPU 2.60GHz, ProcessorCount=4
Frequency=2742188 Hz, Resolution=364.6723 ns, Timer=TSC
  [Host]     : Clr 4.0.30319.42000, 64bit RyuJIT-v4.6.1086.0
  DefaultJob : Clr 4.0.30319.42000, 64bit RyuJIT-v4.6.1086.0

Method	Mean	StdDev	Median
TupleTest	3.9393 ms	0.1072 ms	3.8956 ms
ValueTupleTest	21.6276 ms	1.4960 ms	20.8771 ms

TupleVsValueTupleBenchmarks.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Runtime.CompilerServices;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

public class TupleVsValueTupleBenchmarks
{
    static IEnumerable<Tuple<int, string, string, string, string, IPAddress>> _tupleData;
    static IEnumerable<(int Id, string FirstName, string LastName, string Email, string Gender, IPAddress IpAddress)> _valueTupleData;

    [Benchmark]
    public void TupleTest()
    {
        foreach (var x in _tupleData)
            Do(x, 0);
    }

    [Benchmark]
    public void ValueTupleTest()
    {
        foreach (var x in _valueTupleData)
            Do(x, 0);
    }

    [MethodImpl(MethodImplOptions.NoInlining)]
    public Tuple<int, string, string, string, string, IPAddress> Do(Tuple<int, string, string, string, string, IPAddress> e, int level) =>
        level < 16 ? Do(e, level + 1) : e;

    [MethodImpl(MethodImplOptions.NoInlining)]
    public (int, string, string, string, string, IPAddress) Do((int, string, string, string, string, IPAddress) e, int level) =>
        level < 16 ? Do(e, level + 1) : e;

    [Setup]
    public void Init()
    {
        using (var http = new HttpClient())
        {
            var csv = http.GetStringAsync("https://gist.githubusercontent.com/atifaziz/15ecebe1a99b3b1d66f262762ac757dd/raw/988e111dd600a995d1be106768363b9ca131342d/mockaroo.csv").Result;

            var data =
                from lines in Enumerable.Repeat(csv.Split('\n').Skip(1), 100)
                from line in lines
                select line.Trim().Split(',') into row
                where row.Length == 6
                select new object[]
                {
                    int.Parse(row[0]),
                    row[1],
                    row[2],
                    row[3],
                    row[4],
                    IPAddress.Parse(row[5]),
                };

            _tupleData =
                from row in data
                select Tuple.Create((int)       row[0],
                                    (string)    row[1],
                                    (string)    row[2],
                                    (string)    row[3],
                                    (string)    row[4],
                                    (IPAddress) row[5]);

            _tupleData = _tupleData.ToArray();

            _valueTupleData =
                from row in data
                select ((int)       row[0],
                        (string)    row[1],
                        (string)    row[2],
                        (string)    row[3],
                        (string)    row[4],
                        (IPAddress) row[5]);

            _valueTupleData = _valueTupleData.ToArray();
        }
    }
}

static class Program
{
    static void Main(string[] args) =>
        BenchmarkRunner.Run<TupleVsValueTupleBenchmarks>();
}