PrimeOrderCalculator.Cpu cleaned up - hybrid & GPU related methods moved to their corresponding files.

PerfectNumbers.Core/PrimeOrderCalculator.Config.cs

@@ -0,0 +1,39 @@
+using System.Runtime.CompilerServices;
+
+namespace PerfectNumbers.Core;
+
+internal static partial class PrimeOrderCalculator
+{
+	internal readonly struct PrimeOrderCalculatorConfig(uint smallFactorLimit, int pollardRhoMilliseconds, int maxPowChecks, bool strictMode)
+	{
+		private static PrimeOrderCalculatorConfig _heuristicDefault = CreateHeuristicDefault(UnboundedTaskScheduler.ConfiguredThreadCount);
+
+		public static PrimeOrderCalculatorConfig HeuristicDefault
+		{
+			[MethodImpl(MethodImplOptions.AggressiveInlining)]
+			get => _heuristicDefault;
+		}
+
+		public static readonly PrimeOrderCalculatorConfig StrictDefault = new(smallFactorLimit: 1_000_000, pollardRhoMilliseconds: 0, maxPowChecks: 0, true);
+
+		public static void ConfigureHeuristicDefault(int threadCount)
+		{
+			_heuristicDefault = CreateHeuristicDefault(threadCount);
+		}
+
+		public static PrimeOrderCalculatorConfig CreateHeuristicDefault(int threadCount)
+		{
+			int normalizedThreadCount = threadCount < 1 ? 1 : threadCount;
+			return new(smallFactorLimit: 100_000, pollardRhoMilliseconds: normalizedThreadCount * 24, maxPowChecks: 24, false);
+		}
+
+		public readonly uint SmallFactorLimit = smallFactorLimit;
+		public readonly int PollardRhoMilliseconds = pollardRhoMilliseconds;
+		public readonly int MaxPowChecks = maxPowChecks;
+		public readonly int MaxPowChecksCapacity = maxPowChecks << 2;
+		public readonly bool StrictMode = strictMode;
+	}
+
+	// TODO: Remove branching on the CPU / GPU paths
+	// TODO: Split big non-static functions into smaller / extract static code to limit JIT time
+}