Add benchmarks

Benchmark/Bench.cs

@@ -0,0 +1,59 @@
+using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Jobs;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Craftimizer.Benchmark;
+
+[SimpleJob(RuntimeMoniker.Net70)]
+[SimpleJob(RuntimeMoniker.NativeAot70)]
+public class Bench
+{
+    private float[] data;
+    private int[] dataLengths;
+
+    [Params(1000, 10000)]
+    public int N;
+
+    [GlobalSetup]
+    public void Setup()
+    {
+        var rand = new Random();
+        data = new float[N * 8];
+        dataLengths = new int[N];
+        for (var i = 0; i < data.Length; i += 8)
+        {
+            var len = rand.NextSingle() > .5 ? 8 : rand.Next(1, 9);
+            dataLengths[i / 8] = len;
+            for (var j = 0; j < len; ++j)
+                data[i + j] = rand.NextSingle();
+            for (var j = len; j < 8; ++j)
+                data[i + j] = float.NaN;
+        }
+    }
+
+    [Benchmark]
+    public int[] Scalar()
+    {
+        var d = new int[N];
+        var dataSpan = data.AsSpan();
+        for (var i = 0; i < N; ++i)
+            d[i] = Solver.Crafty.Solver.HMaxIndexScalar(new Vector<float>(dataSpan.Slice(i * 8, 8)), dataLengths[i]);
+        return d;
+    }
+
+    [Benchmark]
+    public int[] AVX2()
+    {
+        var d = new int[128];
+        var dataSpan = data.AsSpan();
+        for (var i = 0; i < 128; ++i)
+            d[i] = Solver.Crafty.Solver.HMaxIndexAVX2(new Vector<float>(dataSpan.Slice(i * 8, 8)), dataLengths[i]);
+        return d;
+    }
+}