mlemanczyk/even-perfect-numbers-scanner
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Isolate CPU divisor pools per thread

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Marek Lemańczyk committed 2025-10-11 21:17:12 +02:00
1 parent cd69c08fb4
commit 8e9390bc5e
7 files changed
+61 -34
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PerfectNumbers.Core/PrimeOrderCalculator.Wide.cs
+4 -4
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@@ -162,7 +162,7 @@ internal static partial class PrimeOrderCalculator
return order;
}
tempArray = ArrayPool<FactorEntry128>.Shared.Rent(length + 1);
tempArray = ThreadLocalArrayPool<FactorEntry128>.Shared.Rent(length + 1);
Span<FactorEntry128> buffer = tempArray.AsSpan(0, length);
factorSpan.CopyTo(buffer);
@@ -200,7 +200,7 @@ internal static partial class PrimeOrderCalculator
{
if (tempArray is not null)
{
ArrayPool<FactorEntry128>.Shared.Return(tempArray, clearArray: false);
ThreadLocalArrayPool<FactorEntry128>.Shared.Return(tempArray, clearArray: false);
}
}
}
@@ -664,7 +664,7 @@ internal static partial class PrimeOrderCalculator
return new PartialFactorResult128(null, value, false, 0);
}
FactorEntry128[]? rented = counts.Count > 0 ? ArrayPool<FactorEntry128>.Shared.Rent(counts.Count) : null;
FactorEntry128[]? rented = counts.Count > 0 ? ThreadLocalArrayPool<FactorEntry128>.Shared.Rent(counts.Count) : null;
int index = 0;
if (rented is not null)
{
@@ -682,7 +682,7 @@ internal static partial class PrimeOrderCalculator
span.Sort(static (a, b) => a.Value.CompareTo(b.Value));
resultArray = new FactorEntry128[index];
span.CopyTo(resultArray);
ArrayPool<FactorEntry128>.Shared.Return(rented, clearArray: false);
ThreadLocalArrayPool<FactorEntry128>.Shared.Return(rented, clearArray: false);
}
bool fullyFactored = cofactor == UInt128.One;