matrix4x4benchmark.cs

using System.Runtime.CompilerServices;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

public struct Matrix4x4
{
	public float M11, M12, M13, M14;
	public float M21, M22, M23, M24;
	public float M31, M32, M33, M34;
	public float M41, M42, M43, M44;

	public static void Add(in Matrix4x4 left, in Matrix4x4 right, out Matrix4x4 result)
	{
		result.M11 = left.M11 + right.M11; result.M12 = left.M12 + right.M12; result.M13 = left.M13 + right.M13; result.M14 = left.M14 + right.M14;
		result.M21 = left.M21 + right.M21; result.M22 = left.M22 + right.M22; result.M23 = left.M23 + right.M23; result.M24 = left.M24 + right.M24;
		result.M31 = left.M31 + right.M31; result.M32 = left.M32 + right.M32; result.M33 = left.M33 + right.M33; result.M34 = left.M34 + right.M34;
		result.M41 = left.M41 + right.M41; result.M42 = left.M42 + right.M42; result.M43 = left.M43 + right.M43; result.M44 = left.M44 + right.M44;
	}
	
	[MethodImpl(MethodImplOptions.AggressiveInlining)]
	public static void AddInline(in Matrix4x4 left, in Matrix4x4 right, out Matrix4x4 result)
	{
		result.M11 = left.M11 + right.M11; result.M12 = left.M12 + right.M12; result.M13 = left.M13 + right.M13; result.M14 = left.M14 + right.M14;
		result.M21 = left.M21 + right.M21; result.M22 = left.M22 + right.M22; result.M23 = left.M23 + right.M23; result.M24 = left.M24 + right.M24;
		result.M31 = left.M31 + right.M31; result.M32 = left.M32 + right.M32; result.M33 = left.M33 + right.M33; result.M34 = left.M34 + right.M34;
		result.M41 = left.M41 + right.M41; result.M42 = left.M42 + right.M42; result.M43 = left.M43 + right.M43; result.M44 = left.M44 + right.M44;
	}
		
	public static Matrix4x4 operator +(Matrix4x4 left, Matrix4x4 right)
	{
		Matrix4x4 result;
		result.M11 = left.M11 + right.M11; result.M12 = left.M12 + right.M12; result.M13 = left.M13 + right.M13; result.M14 = left.M14 + right.M14;
		result.M21 = left.M21 + right.M21; result.M22 = left.M22 + right.M22; result.M23 = left.M23 + right.M23; result.M24 = left.M24 + right.M24;
		result.M31 = left.M31 + right.M31; result.M32 = left.M32 + right.M32; result.M33 = left.M33 + right.M33; result.M34 = left.M34 + right.M34;
		result.M41 = left.M41 + right.M41; result.M42 = left.M42 + right.M42; result.M43 = left.M43 + right.M43; result.M44 = left.M44 + right.M44;
		return result;
	}

	public static Matrix4x4 operator -(in Matrix4x4 left, in Matrix4x4 right)
	{
		Matrix4x4 result;
		result.M11 = left.M11 + right.M11; result.M12 = left.M12 + right.M12; result.M13 = left.M13 + right.M13; result.M14 = left.M14 + right.M14;
		result.M21 = left.M21 + right.M21; result.M22 = left.M22 + right.M22; result.M23 = left.M23 + right.M23; result.M24 = left.M24 + right.M24;
		result.M31 = left.M31 + right.M31; result.M32 = left.M32 + right.M32; result.M33 = left.M33 + right.M33; result.M34 = left.M34 + right.M34;
		result.M41 = left.M41 + right.M41; result.M42 = left.M42 + right.M42; result.M43 = left.M43 + right.M43; result.M44 = left.M44 + right.M44;
		return result;
	}
		
	public static Matrix4x4 operator *(in Matrix4x4 left, in Matrix4x4 right)
	{
		Matrix4x4.Add(in left, in right, out Matrix4x4 result);
		return result;
	}

	[MethodImpl(MethodImplOptions.AggressiveInlining)]
	public static Matrix4x4 operator /(in Matrix4x4 left, in Matrix4x4 right)
	{
		Matrix4x4.Add(in left, in right, out Matrix4x4 result);
		return result;
	}

	public static Matrix4x4 operator &(in Matrix4x4 left, in Matrix4x4 right)
	{
		Matrix4x4.AddInline(in left, in right, out Matrix4x4 result);
		return result;
	}

	[MethodImpl(MethodImplOptions.AggressiveInlining)]
	public static Matrix4x4 operator |(in Matrix4x4 left, in Matrix4x4 right)
	{
		Matrix4x4.AddInline(in left, in right, out Matrix4x4 result);
		return result;
	}
}

public class Matrix4x4Benchmark
{
	private static readonly Matrix4x4 testMatrix = new Matrix4x4
	{
		M11 = 0.11f, M12 = 0.12f, M13 = 0.13f, M14 = 0.14f,
		M21 = 0.21f, M22 = 0.22f, M23 = 0.23f, M24 = 0.24f,
		M31 = 0.31f, M32 = 0.32f, M33 = 0.33f, M34 = 0.34f,
		M41 = 0.41f, M42 = 0.42f, M43 = 0.43f, M44 = 0.44f,
	};

	[Benchmark]
	public Matrix4x4 StaticMethod()
	{
		Matrix4x4 a = testMatrix;
		Matrix4x4 b = testMatrix;
		Matrix4x4 c;

		Matrix4x4.Add(in a, in b, out c);
		Matrix4x4.Add(in c, in a, out b);
		Matrix4x4.Add(in b, in c, out a);

		Matrix4x4.Add(in a, in b, out c);
		Matrix4x4.Add(in c, in a, out b);
		Matrix4x4.Add(in b, in c, out a);

		return a;
	}

	[Benchmark]
	public Matrix4x4 StaticMethodInline()
	{
		Matrix4x4 a = testMatrix;
		Matrix4x4 b = testMatrix;
		Matrix4x4 c;

		Matrix4x4.AddInline(in a, in b, out c);
		Matrix4x4.AddInline(in c, in a, out b);
		Matrix4x4.AddInline(in b, in c, out a);

		Matrix4x4.AddInline(in a, in b, out c);
		Matrix4x4.AddInline(in c, in a, out b);
		Matrix4x4.AddInline(in b, in c, out a);

		return a;
	}

	[Benchmark]
	public Matrix4x4 StandardOperator()
	{
		Matrix4x4 a = testMatrix;
		Matrix4x4 b = testMatrix;
		Matrix4x4 c;

		c = a + b;
		b = c + a;
		a = b + c;

		c = a + b;
		b = c + a;
		a = b + c;

		return a;
	}

	[Benchmark]
	public Matrix4x4 InOperator()
	{
		Matrix4x4 a = testMatrix;
		Matrix4x4 b = testMatrix;
		Matrix4x4 c;

		c = a - b;
		b = c - a;
		a = b - c;

		c = a - b;
		b = c - a;
		a = b - c;

		return a;
	}

	[Benchmark]
	public Matrix4x4 InOperatorCallsStaticMethod()
	{
		Matrix4x4 a = testMatrix;
		Matrix4x4 b = testMatrix;
		Matrix4x4 c;

		c = a * b;
		b = c * a;
		a = b * c;

		c = a * b;
		b = c * a;
		a = b * c;

		return a;
	}

	[Benchmark]
	public Matrix4x4 InOperatorInlineCallsStaticMethod()
	{
		Matrix4x4 a = testMatrix;
		Matrix4x4 b = testMatrix;
		Matrix4x4 c;

		c = a / b;
		b = c / a;
		a = b / c;

		c = a / b;
		b = c / a;
		a = b / c;

		return a;
	}

	[Benchmark]
	public Matrix4x4 InOperatorCallsStaticMethodInline()
	{
		Matrix4x4 a = testMatrix;
		Matrix4x4 b = testMatrix;
		Matrix4x4 c;

		c = a & b;
		b = c & a;
		a = b & c;

		c = a & b;
		b = c & a;
		a = b & c;

		return a;
	}

	[Benchmark]
	public Matrix4x4 InOperatorInlineCallsStaticMethodInline()
	{
		Matrix4x4 a = testMatrix;
		Matrix4x4 b = testMatrix;
		Matrix4x4 c;

		c = a | b;
		b = c | a;
		a = b | c;
		
		c = a | b;
		b = c | a;
		a = b | c;

		return a;
	}
}

static class Program
{
	public static void Main(string[] args)
	{
		var summary = BenchmarkRunner.Run<Matrix4x4Benchmark>();
	}
}