ListCreationBenchmark

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

namespace ListCreationBenchmark;

public class Program
{
    private const int ListSize = 100000;
    private static readonly List<int> ListOne = Enumerable.Range(1, ListSize).OrderBy(n => Random.Shared.Next()).ToList();

    [Benchmark]
    public void ToListTest()
    {
        var listTwo = ListOne.ToList();
    }

    [Benchmark]
    public void ForTest()
    {
        var listTwo = new List<int>(ListSize);
        for (var i = 0; i < ListOne.Count; i++)
        {
            listTwo.Add(ListOne[i]);
        }
    }

    [Benchmark]
    public void ForEachTest()
    {
        var listTwo = new List<int>(ListSize);
        foreach (var t in ListOne)
        {
            listTwo.Add(t);
        }
    }

    [Benchmark]
    public void AddRangeTest()
    {
        var listTwo = new List<int>(ListSize);
        listTwo.AddRange(ListOne);
    }

    private static void Main()
    {
        var summary = BenchmarkRunner.Run<Program>();
    }
}