OM Dictionary vs Switch Function

gistfile1.cs

using System;
using System.Text;
using System.Collections.Generic;
using System.Linq;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace TestProject1
{
    public enum SomeStatusModeType
    {
        Status1,
        Status2
    }
    [TestClass]
    public class SomeUnitTest
    {
        public const int NumIterations = 10000000;
        public static class AnotherStatusModeType
        {
            public const int AnotherStatus1 = 1;
            public const int AnotherStatus2 = 2;
            public const int AnotherStatus3 = 3;
            public const int AnotherStatus4 = 4;
        }
        public static int[] ReferralStatusModes(SomeStatusModeType modeType)
        {
            switch (modeType)
            {
                case SomeStatusModeType.Status1:
                    return new[] 
                    {
                        AnotherStatusModeType.AnotherStatus1,
                        AnotherStatusModeType.AnotherStatus2,
                        AnotherStatusModeType.AnotherStatus3,
                    };
                case SomeStatusModeType.Status2:
                    return new[] 
                    {
                        AnotherStatusModeType.AnotherStatus3,
                        AnotherStatusModeType.AnotherStatus4
                    };
                default:
                    return new int[] { };
            }
        }
        private readonly static IDictionary<SomeStatusModeType, int[]> ReferralStatusModesDictionary = new Dictionary<SomeStatusModeType, int[]>
        {
            {
                SomeStatusModeType.Status1, 
                new[] 
                {
                    AnotherStatusModeType.AnotherStatus1,
                    AnotherStatusModeType.AnotherStatus2,
                    AnotherStatusModeType.AnotherStatus3,
                }
            },
            {
                SomeStatusModeType.Status2,
                new[] 
                {
                    AnotherStatusModeType.AnotherStatus3,
                    AnotherStatusModeType.AnotherStatus4
                }
            }
        };
        private void Time(string subject, Action actionToTime)
        {
            var sw = new System.Diagnostics.Stopwatch();
            sw.Start();
            try
            {
                actionToTime.Invoke();
            }
            finally
            {
                sw.Stop();
                System.Diagnostics.Debug.WriteLine("{0} - elapsed ms: {1}", subject, sw.ElapsedMilliseconds);
            }
        }
        
        [TestMethod]
        public void DemonstrateEvaluationOfFunction()
        {
            Time("Switch Function", () => 
                {
                    var theVal = Enumerable.Range(0, NumIterations)
                        .Select(_ => SomeUnitTest.ReferralStatusModes(SomeStatusModeType.Status1).Contains(_));
                    theVal.ToList();
                });
        }
        [TestMethod]
        public void DemonstrateDictionary()
        {
            Time("Dictionary", () =>
            {
                var theVal = Enumerable.Range(0, NumIterations)
                    .Select(_ => ReferralStatusModesDictionary[SomeStatusModeType.Status1].Contains(_));
                theVal.ToList();
            });
        }
    }
}