Genericsのほうが早んだけど！？

GenericsSpeedTest.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;

namespace GenericsSpeedTest
{
    static class Program
    {
        static int BiggerInt(int i, int j)
        {
            return (i.CompareTo(j) > 0) ? i : j;
        }

        static T Bigger<T>(T i, T j) where T : IComparable<T>
        {
            return (i.CompareTo(j) > 0) ? i : j;
        }

        static int _count = 10000;

        static void NonJeneric()
        {
            for (int j = 0; j < _count; ++j)
            {
                for (int i = 0; i < _count; ++i)
                {
                    var tmp = BiggerInt(i, j);
                }
            }
        }

        static void GenericsInt()
        {

            for (int j = 0; j < _count; ++j)
            {
                for (int i = 0; i < _count; ++i)
                {
                    var tmp = Bigger(i, j);
                }
            }
        }

        static void Main(string[] args)
        {
            var sw = new Stopwatch();

            sw.Restart();
            GenericsInt();
            sw.Stop();
            Console.WriteLine(sw.ElapsedMilliseconds);

            sw.Restart();
            GenericsInt();
            sw.Stop();
            Console.WriteLine(sw.ElapsedMilliseconds);

            sw.Restart();
            NonJeneric();
            sw.Stop();
            Console.WriteLine(sw.ElapsedMilliseconds);
        }
    }
}