[TestMethod]
        public void TestFIFOSet()
        {
            Stopwatch stopwatch = new Stopwatch();
            var bucket = new FIFOSet<int>(150_000);
            stopwatch.Start();
            for (int i = 1; i <= 550_000; i++)
            {
                bucket.Add(i);
            }
            stopwatch.Stop();
            Console.WriteLine($"Add timespan: {stopwatch.Elapsed.TotalSeconds}s");
            stopwatch.Reset();
            var items = new int[10000];
            var value = 550_000;
            for (int i = 0; i <= 9999; i++)
            {
                items[i] = value;
                value -= 50;
            }
            stopwatch.Start();
            bucket.ExceptWith(items);
            stopwatch.Stop();
            Console.WriteLine($"except with timespan: {stopwatch.Elapsed.TotalSeconds}s");
            stopwatch.Reset();

            stopwatch.Start();
            var ret = bucket.Contains(140_000);
            stopwatch.Stop();
            Console.WriteLine($"contains with timespan: {stopwatch.Elapsed.TotalSeconds}s result: {ret}");
            stopwatch.Reset();

            stopwatch.Start();
            ret = bucket.Contains(545_001);
            stopwatch.Stop();
            Console.WriteLine($"contains with timespan: {stopwatch.Elapsed.TotalSeconds}s result: {ret}");
            stopwatch.Reset();
        }