Extension methods benchmarked. Slower alternatives replaced.

EvenPerfectBitScanner.Benchmarks/Mod6ULongBenchmarks.cs

@@ -1,4 +1,4 @@
-using System.Numerics;
+using System.Runtime.CompilerServices;
 using BenchmarkDotNet.Attributes;
 using BenchmarkDotNet.Jobs;
 using PerfectNumbers.Core;
@@ -9,13 +9,20 @@ namespace EvenPerfectBitScanner.Benchmarks;
 [MemoryDiagnoser]
 public class Mod6ULongBenchmarks
 {
+	private static readonly byte[] Mod6Lookup = [0, 3, 4, 1, 2, 5];
     private static readonly ulong Divisor = 6UL;
     private static readonly ulong FastDivMul = (ulong)(((UInt128)1 << 64) / Divisor);
 
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static ulong Mod6(ulong value) => Mod6Lookup[(int)(((value % 3UL) << 1) | (value & 1UL))];
+
     [Params(3UL, 131071UL, ulong.MaxValue)]
     public ulong Value { get; set; }
 
-    [Benchmark(Baseline = true)]
+	/// <summary>
+	/// Fastest
+	/// </summary>
+	[Benchmark(Baseline = true)]
     public ulong ModuloOperator()
     {
                 return Value % Divisor;
@@ -38,6 +45,6 @@ public class Mod6ULongBenchmarks
     [Benchmark]
     public ulong ExtensionMethod()
     {
-        return Value.Mod6();
+        return Mod6(Value);
     }
 }