From e8cca74f685bb9641b3478be93e40dc952aaa8e9 Mon Sep 17 00:00:00 2001
From: mlemanczyk <marek@lemanczyk.eu>
Date: Sat, 13 Dec 2025 16:00:28 +0100
Subject: [PATCH] DeeterministicRandom types optimized.

---
 .../Cpu/DeterministicRandomCpu.cs             |  7 +------
 .../Gpu/DeterministicRandomGpu.cs             | 20 ++++++-------------
 .../MersenneNumberDivisorByDivisorTester.cs   |  2 ++
 3 files changed, 9 insertions(+), 20 deletions(-)

diff --git a/PerfectNumbers.Core/Cpu/DeterministicRandomCpu.cs b/PerfectNumbers.Core/Cpu/DeterministicRandomCpu.cs
index 084d199..61c7b02 100644
--- a/PerfectNumbers.Core/Cpu/DeterministicRandomCpu.cs
+++ b/PerfectNumbers.Core/Cpu/DeterministicRandomCpu.cs
@@ -13,11 +13,6 @@ internal static class DeterministicRandomCpu
     public static ulong NextUInt64()
     {
         ulong state = s_threadState;
-        if (state == 0UL)
-        {
-            state = InitializeThreadState();
-        }
-
         state ^= state >> 12;
         state ^= state << 25;
         state ^= state >> 27;
@@ -34,7 +29,7 @@ internal static class DeterministicRandomCpu
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
-    private static ulong InitializeThreadState()
+    public static ulong Initialize()
     {
         ulong seed = (ulong)Interlocked.Increment(ref s_seedCounter);
         seed += 0x9E3779B97F4A7C15UL;
diff --git a/PerfectNumbers.Core/Gpu/DeterministicRandomGpu.cs b/PerfectNumbers.Core/Gpu/DeterministicRandomGpu.cs
index 996ba67..860b15a 100644
--- a/PerfectNumbers.Core/Gpu/DeterministicRandomGpu.cs
+++ b/PerfectNumbers.Core/Gpu/DeterministicRandomGpu.cs
@@ -14,33 +14,25 @@ internal struct DeterministicRandomGpu
 {
 	private static long s_seedCounter;
 
-	private ulong _state;
-	public readonly ulong State
-	{
-		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		get
-		{
-			return _state;
-		}
-	}
+	public ulong State;
 
 	public DeterministicRandomGpu()
 	{
-		_state = CreateThreadState();
+		State = CreateThreadState();
 	}
 
 	public DeterministicRandomGpu(ulong initialState)
 	{
-		_state = initialState;
+		State = initialState;
 	}
 
 	public ulong NextUInt64()
 	{
-		ulong state = _state;
+		ulong state = State;
 		state ^= state >> 12;
 		state ^= state << 25;
 		state ^= state >> 27;
-		_state = state;
+		State = state;
 		return state * 2685821657736338717UL;
 	}
 
@@ -55,7 +47,7 @@ internal struct DeterministicRandomGpu
 
 	public void SetState(ulong state)
 	{
-		_state = state;
+		State = state;
 	}
 
 	private static ulong CreateThreadState()
diff --git a/PerfectNumbers.Core/MersenneNumberDivisorByDivisorTester.cs b/PerfectNumbers.Core/MersenneNumberDivisorByDivisorTester.cs
index 8e505be..fa2cbce 100644
--- a/PerfectNumbers.Core/MersenneNumberDivisorByDivisorTester.cs
+++ b/PerfectNumbers.Core/MersenneNumberDivisorByDivisorTester.cs
@@ -324,6 +324,7 @@ public static class MersenneNumberDivisorByDivisorTester
 
 		if (workerCount == 1)
 		{
+			DeterministicRandomCpu.Initialize();
 			var gpu = PrimeOrderCalculatorAccelerator.Rent(1);
 			foreach (ulong prime in filteredPrimes)
 			{
@@ -360,6 +361,7 @@ public static class MersenneNumberDivisorByDivisorTester
 				tasks[taskIndex++] = Task.Factory.StartNew(
 					() =>
 					{
+						DeterministicRandomCpu.Initialize();
 						startGate.Wait();
 						GpuPrimeWorkLimiter.Acquire();
 						Console.WriteLine($"Task started for range {rangeStart}");