using BenchmarkDotNet.Attributes;

namespace ConsoleApp2
{
	[CsvExporter]
	[CsvMeasurementsExporter]
	public class AccessBench
	{
		private int[,] _matrix;
		private int[][] _jagged;

		[Params(2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048)] public int _size;

		[GlobalSetup]
		public void GlobalSetup()
		{
			_matrix = new int[_size, _size];
			_jagged = new int[_size][];

			for (int r = 0; r < _size; r++)
			{
				_jagged[r] = new int[_size];
				for (int c = 0; c < _size; c++)
				{
					_matrix[r, c] = r * 10 + c;
					_jagged[r][c] = r * 10 + c;
				}
			}
		}

		[Benchmark]
		[BenchmarkCategory("Read")]
		public int ReadMatrixRowCol()
		{
			var accum = 0;

			for (int r = 0; r < _size; r++)
				for (int c = 0; c < _size; c++)
				{
					accum += _matrix[r, c];
				}

			return accum;
		}

		[Benchmark]
		[BenchmarkCategory("Read")]
		public int ReadJaggedRowCol()
		{
			var accum = 0;

			foreach (var row in _jagged)
			{
				foreach (var i in row)
				{
					accum += i;
				}
			}
			return accum;
		}

		[Benchmark]
		[BenchmarkCategory("Read")]
		public int ReadMatrixColRow()
		{
			var accum = 0;

			for (int c = 0; c < _size; c++)
				for (int r = 0; r < _size; r++)
				{
					accum += _matrix[r, c];
				}

			return accum;
		}

		[Benchmark]
		[BenchmarkCategory("Read")]
		public int ReadJaggedColRow()
		{
			var accum = 0;

			for (int c = 0; c < _size; c++)
				for (int r = 0; r < _size; r++)
				{
					accum += _jagged[r][c];
				}

			return accum;
		}
	}
}