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% 10 operations replaces with UInt128/ulong.Mod10 methods

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Marek Lemańczyk committed 2025-09-21 07:42:25 +02:00
1 parent 3e0102a404
commit 412ce4fd50
13 files changed
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EvenPerfectBitScanner.Benchmarks/Mod10_8_5_3StepsBenchmarks.cs
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using System.Numerics;
using BenchmarkDotNet.Attributes;
using PerfectNumbers.Core;
namespace EvenPerfectBitScanner.Benchmarks;
[MemoryDiagnoser]
public class Mod10_8_5_3StepsBenchmarks
{
[Params(3UL, 8191UL, 131071UL, 2147483647UL)]
public ulong Value { get; set; }
[Benchmark(Baseline = true)]
public (ulong Mod10, ulong Mod8, ulong Mod3, ulong Mod5) LegacyModulo()
{
UInt128 value = Value;
ulong mod10 = (ulong)(value % 10UL) % 10UL;
ulong mod8 = (ulong)(value % 8UL);
ulong mod3 = (ulong)(value % 3UL);
ulong mod5 = (ulong)(value % 5UL);
return (mod10, mod8, mod3, mod5);
}
[Benchmark]
public (ulong Mod10, ulong Mod8, ulong Mod3, ulong Mod5) ModMethodModulo()
{
Value.Mod10_8_5_3(out ulong mod10, out ulong mod8, out ulong mod5, out ulong mod3);
// Step residues for q += 2*p
mod10 = mod10.Mod10();
return (mod10, mod8, mod3, mod5);
}
}