Extension methods benchmarked. Slower alternatives replaced.

EvenPerfectBitScanner.Benchmarks/Mod5ULongBenchmarks.cs

@@ -1,3 +1,4 @@
+using System.Runtime.CompilerServices;
 using BenchmarkDotNet.Attributes;
 using BenchmarkDotNet.Jobs;
 using PerfectNumbers.Core;
@@ -8,10 +9,22 @@ namespace EvenPerfectBitScanner.Benchmarks;
 [MemoryDiagnoser]
 public class Mod5ULongBenchmarks
 {
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static ulong Mod5(ulong value) =>
+			(
+				(uint)(value & ULongExtensions.WordBitMask) +
+				(uint)((value >> 16) & ULongExtensions.WordBitMask) +
+				(uint)((value >> 32) & ULongExtensions.WordBitMask) +
+				(uint)((value >> 48) & ULongExtensions.WordBitMask)
+			) % 5;
+
     [Params(5UL, 8191UL, 131071UL, 2147483647UL, ulong.MaxValue - 31UL)]
     public ulong Value { get; set; }
 
-    [Benchmark(Baseline = true)]
+	/// <summary>
+	/// Fastest
+	/// </summary>
+	[Benchmark(Baseline = true)]
     public ulong ModuloOperator()
     {
         return Value % 5UL;
@@ -20,7 +33,7 @@ public class Mod5ULongBenchmarks
     [Benchmark]
     public ulong ExtensionMethod()
     {
-        return Value.Mod5();
+        return Mod5(Value);
     }
 }