sortBench.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

namespace ArraySortBenchmark
{
	class Program
	{
		static void Main(string[] args)
		{
			var summary = BenchmarkRunner.Run<ArraySortBenchmark>();

		}
	}

	public class ArraySortBenchmark
	{
		private int[] _array = new int[1000 * 1000];

		public ArraySortBenchmark()
		{
			var random = new Random(42);

			for (int i = 0; i < _array.Length; ++i)
			{
				_array[i] = random.Next();
			}
		}

		[Benchmark]
		public void SortWithComparator()
		{
			Array.Sort(_array, (x, y) => y.CompareTo(x));
		}

		[Benchmark]
		public void SortWithReverse()
		{
			Array.Sort(_array);
			Array.Reverse(_array);
		}
	}
}