hash-measure.cs

using System;
using System.Collections.Generic;

namespace ConsoleApp28
{
    class Program
    {
        static void Main(string[] args)
        {
            var keys = new List<ulong>();
            var values = new List<ulong>();

            var wyRng = new WyHash.WyRng(0);
            for (int i = 0; i < 1_000_000; i++)
            {
                keys.Add(wyRng.NextLong());
                values.Add(wyRng.NextLong());
            }

            var before = GC.GetTotalMemory(true);

            var dic = new Dictionary<ulong, ulong>();

            for (int i = 0; i < 1_000_000; i++)
            {
                dic[keys[i]] = values[i];
            }

            for (int i = 0; i < 5; i++)
            {
                GC.Collect(2);
                GC.WaitForPendingFinalizers();
            }

            var after = GC.GetTotalMemory(true);


            Console.WriteLine(after - before);

            GC.KeepAlive(dic);
            GC.KeepAlive(keys);
            GC.KeepAlive(values);

        }
    }
}