BenchmarkForLoops.cs

BenchmarkForLoops.cs

namespace Benchmarks;

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Configs;
using BenchmarkDotNet.Reports;
using BenchmarkDotNet.Running;

public sealed class Program
{
    public static void Main(string[] args)
    {
        ManualConfig config = ManualConfig.Create(DefaultConfig.Instance);

        Summary summary = BenchmarkRunner.Run<Runner>(config);
    }
}

public class Runner
{
    private readonly int[] _array = Enumerable.Range(0, 10_000_000).ToArray();
    private readonly List<int> _list = Enumerable.Range(0, 10_000_000).ToList();

    [Benchmark]
    public long ForLoopArray()
    {
        long count = 0;
        for (int i = 0; i < _array.Length; i++)
        {
            count += _array[i];
        }

        return count;
    }

    [Benchmark]
    public long ForEachLoopArray()
    {
        long count = 0;
        foreach (int t in _array)
        {
            count += t;
        }

        return count;
    }

    [Benchmark]
    public long ForLoopList()
    {
        long count = 0;
        for (int i = 0; i < _list.Count; i++)
        {
            count += _list[i];
        }

        return count;
    }

    [Benchmark]
    public long ForEachLoopList()
    {
        long count = 0;
        foreach (int t in _list)
        {
            count += t;
        }

        return count;
    }
}