Quick performance test

gistfile1.txt

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Linq;

namespace ConsoleApp1
{
    public class Test1
    {

        public static List<string> Input { get; set; } = new List<string>();
        public static void Init(string[] args)
        {
            for (int x = 0; x < 10000000; x++)
            {
                Input.Add(RandomString(10));
            }
        }

        private static Random random = new Random();
        public static string RandomString(int length)
        {
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

        [Benchmark]
        public static void InputZip()
        {
            var result = Input.Zip(Input.Skip(1), (a, b) => ValueTuple.Create(a, b)).ToList();
        }

        [Benchmark]
        public static void PairwiseExtension()
        {
            var pairs = Input.Pairwise().ToList();
        }

        [Benchmark]
        public static void Stack()
        {
            Stack<string> stack = new Stack<string>(Input.ToArray().Reverse());

            var result = new List<ValueTuple<string, string>>();

            while (stack.Count > 1)
            {
                result.Add(new ValueTuple<string, string>(stack.Pop(), stack.Peek()));
            }
        }

        [Benchmark]
        public static void Queue()
        {
            var queue = new Queue<string>(Input);

            var result = new List<ValueTuple<string, string>>();

            while (queue.Count > 1)
            {
                result.Add(new ValueTuple<string, string>(queue.Dequeue(), queue.Peek()));
            }
        }

        [Benchmark]
        public static void ForLoop()
        {

            List<string[]> output = new List<string[]>();
            for (int i = 0; i < Input.Count - 1; i++)
            {
                var pair = new string[2];
                pair[0] = Input[i];
                pair[1] = Input[i + 1];
                output.Add(pair);
            }

        }


        [Benchmark]
        public static void TupleExtension()
        {
            var pairs = Input.Tuples(2).ToList();
        }

    }
}