Performance of invoking method with params array parameter

Params.Performance.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Console
{
    class Program
    {
        static void Main(string[] args)
        {
            // Method invoking without params specifying
            var watch = Stopwatch.StartNew();
            for (int i = 0; i < Int32.MaxValue; i++)
            {
                ParamMethod(String.Empty);
            }

            System.Console.WriteLine("Secods elapsed: {0}", watch.Elapsed.Seconds);
            System.Console.WriteLine("Garbage collection times: {0}", System.GC.CollectionCount(0));

            // Method invoking with null params specifying
            watch = Stopwatch.StartNew();
            for (int i = 0; i < Int32.MaxValue; i++)
            {
                ParamMethod(String.Empty, null);
            }

            System.Console.WriteLine("Secods elapsed: {0}", watch.Elapsed.Seconds);
            System.Console.WriteLine("Garbage collection times: {0}", System.GC.CollectionCount(0));

            // Method invoking without params specifying
            // to prove Garbage Collections and array allocation
            watch = Stopwatch.StartNew();
            for (int i = 0; i < Int32.MaxValue; i++)
            {
                ParamMethod(String.Empty);
            }

            System.Console.WriteLine("Secods elapsed: {0}", watch.Elapsed.Seconds);
            System.Console.WriteLine("Garbage collection times: {0}", System.GC.CollectionCount(0));
        }

        static void ParamMethod(string empty, params int[] rest)
        {

        }
    }
}