mlemanczyk/even-perfect-numbers-scanner
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MontgomeryDivisorData converted to a pooled class to limit GC pressure. MontgomeryDivisorDataGpu added for GPU operations. PrimeOrderCalculator kernels precompiled during warmup.

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mlemanczyk committed 2025-11-24 15:14:31 +01:00
1 parent 07efd5d2a1
commit 070e2a14fd
32 files changed
+310 -192
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EvenPerfectBitScanner.Benchmarks/Pow2ModBenchmarks.cs
+3 -3
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@@ -470,7 +470,7 @@ public class Pow2ModBenchmarks
Console.WriteLine($"Calculating small cycle {smallModulus}");
smallDivisors[i] = CreateMontgomeryDivisorData(smallModulus);
smallExponents[i] = NextSmallExponent(random);
smallCycles[i] = MersenneDivisorCycles.CalculateCycleLength(smallModulus, MontgomeryDivisorData.FromModulus(smallModulus));
smallCycles[i] = MersenneDivisorCycles.CalculateCycleLength(smallModulus, MontgomeryDivisorDataPool.Shared.FromModulus(smallModulus));
(ulong largeModulus, ulong largeCycle) = NextLargeModulusAndCycle(random);
Console.WriteLine($"Calculating large cycle {largeModulus}");
@@ -582,7 +582,7 @@ public class Pow2ModBenchmarks
private static ulong CalculateCycleLengthWithHeuristics(ulong modulus, ref ulong? previousPrimeOrder)
{
MontgomeryDivisorData divisorData = MontgomeryDivisorData.FromModulus(modulus);
MontgomeryDivisorData divisorData = MontgomeryDivisorDataPool.Shared.FromModulus(modulus);
if (modulus <= 1UL || (modulus & 1UL) == 0UL)
{
return MersenneDivisorCycles.CalculateCycleLength(modulus, divisorData);
@@ -651,7 +651,7 @@ public class Pow2ModBenchmarks
private ulong CalculateCycleLengthWithHeuristics(ulong modulus, ulong fallbackOrder = 0UL)
{
MontgomeryDivisorData divisorData = MontgomeryDivisorData.FromModulus(modulus);
MontgomeryDivisorData divisorData = MontgomeryDivisorDataPool.Shared.FromModulus(modulus);
if (modulus <= 1UL || (modulus & 1UL) == 0UL)
{
return fallbackOrder != 0UL ? fallbackOrder : MersenneDivisorCycles.CalculateCycleLength(modulus, divisorData);