DictionaryAddBenchmark.cs

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;

namespace Storage.Benchmark.Glo;

[SimpleJob(RuntimeMoniker.Net60)]
[SimpleJob(RuntimeMoniker.NetCoreApp31)]
[SimpleJob(RuntimeMoniker.Net48)]
[MeanColumn, MemoryDiagnoser]
public class DictionaryAddBenchmark
{
    [Benchmark(Baseline = true)]
    public int DictionaryAdd()
    {
        var dictionary = new Dictionary<int, int>(16);

        foreach (var number in _numbers)
        {
            dictionary.Add(number, number);
        }

        return dictionary.Count;
    }

    [Benchmark]
    public int GlossaryAdd()
    {
        var glossary = new Glossary<int>(16);
        foreach (var number in _numbers)
        {
            glossary.Add(number, number);
        }

        return glossary.Length;
    }

    #region Configuration

    private int[] _numbers = null!;

    [GlobalSetup]
    public void Init()
    {
        const int count = 1021;
        _numbers = Enumerable.Range(0, count).ToArray();

        Shuffle(_numbers, new Random(1234));
    }

    private static void Shuffle<T>(T[] array, Random random)
    {
        var n = array.Length;
        while (n > 1)
        {
            var k = random.Next(n--);
            (array[n], array[k]) = (array[k], array[n]);
        }
    }

    #endregion
}