Hash Code Distribution Test

GetHashCodeBenchmark.cs

using System.Collections;

namespace HashCodeDistributionTest
{
    public class GetHashCodeBenchmark
    {
        private static readonly Hashtable _evenDistributes = new Hashtable();
        private static readonly Hashtable _counters = new Hashtable();

        public class EvenDistributed
        {
            public static int EqualsCount = 0;
            public override int GetHashCode() => base.GetHashCode();
            public override bool Equals(object obj)
            {
                EqualsCount++;
                return false;
            }
        }

        public class Counter
        {
            public static int EqualsCount = 0;
            private static int _lastHash;
            public override int GetHashCode() => _lastHash++;
            public override bool Equals(object obj)
            {
                EqualsCount++;
                return false;
            }
        }

        public static void Setup()
        {
            for (var i = 0; i < 1_500_000; i++)
            {
                _evenDistributes[new EvenDistributed()] = 0;
                _counters[new Counter()] = 0;
            }
        }
    }
}

Program.cs

using System;

namespace HashCodeDistributionTest
{
    class Program
    {
        static void Main(string[] args)
        {
            GetHashCodeBenchmark.Setup();
            Console.WriteLine(GetHashCodeBenchmark.Counter.EqualsCount);
            Console.WriteLine(GetHashCodeBenchmark.EvenDistributed.EqualsCount);
        }
    }
}

Results.txt

Counter: 0
Evenly Distributed: 16724