Add Offset_Benchmark

src/Lynx.Benchmark/Offset_Benchmark.cs

@@ -0,0 +1,54 @@
+/*
+ *
+ *
+ *
+*/
+
+using BenchmarkDotNet.Attributes;
+using Lynx.Model;
+using System.Runtime.CompilerServices;
+
+namespace Lynx.Benchmark;
+
+file static class Utils
+{
+    public static readonly int[] PieceOffsetArray = [0, 6];
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static int PieceOffset(int side)
+    {
+        return 6 - (6 * side);
+    }
+}
+
+public class Offset_Benchmark : BaseBenchmark
+{
+    [Params(1, 10, 100, 1_000, 10_000)]
+    public int Size { get; set; }
+
+    [Benchmark(Baseline = true)]
+    public int Calculated()
+    {
+        int count = 0;
+
+        for (int i = 0; i < Size; ++i)
+        {
+            count += Utils.PieceOffset((int)Side.White) + Utils.PieceOffset((int)Side.Black);
+        }
+
+        return count;
+    }
+
+    [Benchmark]
+    public int Array()
+    {
+        int count = 0;
+
+        for (int i = 0; i < Size; ++i)
+        {
+            count += Utils.PieceOffsetArray[(int)Side.White] + Utils.PieceOffsetArray[(int)Side.Black];
+        }
+
+        return count;
+    }
+}