DictionaryPerf.cs

using System.Collections.Generic;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using BenchmarkDotNet.Attributes;

namespace Dict
{
    public class DictionaryPerf
    {
        private Dictionary<int, int> _original;
        private Dictionary<int, int> _deserialized;

        public DictionaryPerf()
        {
            _original = new Dictionary<int, int> {
                {0, 0}, {1, 1}, {2, 2}, {3, 3}, {4, 4},
                {5, 5}, {6, 6}, {7, 7}, {8, 8}, {9, 9}
            };

            var formatter = new BinaryFormatter();
            var stream = new MemoryStream();
            formatter.Serialize(stream, _original);

            stream.Position = 0;
            _deserialized = (Dictionary<int, int>)formatter.Deserialize(stream);
        }

        [Benchmark(Baseline = true, OperationsPerInvoke = 10)]
        public void Original()
        {
           _original.ContainsKey(0); 
           _original.ContainsKey(1); 
           _original.ContainsKey(2); 
           _original.ContainsKey(3); 
           _original.ContainsKey(4); 
           _original.ContainsKey(5); 
           _original.ContainsKey(6); 
           _original.ContainsKey(7); 
           _original.ContainsKey(8); 
           _original.ContainsKey(9); 
        }

        [Benchmark(OperationsPerInvoke = 10)]
        public void Deserialized()
        {
           _deserialized.ContainsKey(0); 
           _deserialized.ContainsKey(1); 
           _deserialized.ContainsKey(2); 
           _deserialized.ContainsKey(3); 
           _deserialized.ContainsKey(4); 
           _deserialized.ContainsKey(5); 
           _deserialized.ContainsKey(6); 
           _deserialized.ContainsKey(7); 
           _deserialized.ContainsKey(8); 
           _deserialized.ContainsKey(9); 
        }
    }
}