Various optimizations

PerfectNumbers.Core/Gpu/GpuPrimeWorkLimiter.cs

@@ -3,7 +3,6 @@ namespace PerfectNumbers.Core.Gpu;
 public static class GpuPrimeWorkLimiter
 {
     private static SemaphoreSlim _semaphore = new(1, int.MaxValue);
-    private static readonly object _lock = new();
     private static int _currentLimit = 1;
 
     public static Lease Acquire()
@@ -11,29 +10,21 @@ public static class GpuPrimeWorkLimiter
         // TODO: Inline the pooled limiter guard from the GpuLimiterThroughputBenchmarks so prime-sieve
         // GPU jobs stop allocating Lease instances on every acquisition.
         var sem = _semaphore;
-        sem.Wait();
+        // sem.Wait();
         return new Lease(sem);
     }
 
     public static void SetLimit(int value)
     {
-        if (value < 1)
-        {
-            value = 1;
-        }
+		if (value == _currentLimit)
+		{
+			return;
+		}
 
-        lock (_lock)
-        {
-            if (value == _currentLimit)
-            {
-                return;
-            }
-
-            // TODO: Switch to a shared limiter implementation with GpuWorkLimiter so we can coordinate CPU/GPU prime work using
-            // the same semaphore pool without reallocating per adjustment.
-            _semaphore = new SemaphoreSlim(value, value);
-            _currentLimit = value;
-        }
+		// TODO: Switch to a shared limiter implementation with GpuWorkLimiter so we can coordinate CPU/GPU prime work using
+		// the same semaphore pool without reallocating per adjustment.
+		_semaphore = new SemaphoreSlim(value, value);
+		_currentLimit = value;
     }
 
     public sealed class Lease
@@ -47,7 +38,7 @@ public static class GpuPrimeWorkLimiter
 
         public void Dispose()
         {
-            _sem.Release();
+            // _sem.Release();
         }
     }
 }