mlemanczyk/even-perfect-numbers-scanner
1
0 Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Restore struct residue args and add residue benchmark project

Browse Source
This commit is contained in:
Marek Lemańczyk committed 2025-09-21 05:29:13 +02:00
1 parent 4fe701425e
commit 5ab69f8c01
10 files changed
+326 -165
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

EvenPerfectBitScanner.Benchmarks/ResidueComputationBenchmarks.cs
+36
View File
@@ -0,0 +1,36 @@
using System.Numerics;
using BenchmarkDotNet.Attributes;
using PerfectNumbers.Core;
namespace EvenPerfectBitScanner.Benchmarks;
[MemoryDiagnoser]
public class ResidueComputationBenchmarks
{
[Params(3UL, 8191UL, 131071UL, 2147483647UL)]
public ulong Exponent { get; set; }
[Benchmark(Baseline = true)]
public (ulong Step10, ulong Step8, ulong Step3, ulong Step5) LegacyModulo()
{
ulong exponent = Exponent;
ulong step10 = ((exponent % 10UL) << 1) % 10UL;
ulong step8 = ((exponent & 7UL) << 1) & 7UL;
ulong step3 = ((exponent % 3UL) << 1) % 3UL;
ulong step5 = ((exponent % 5UL) << 1) % 5UL;
return (step10, step8, step3, step5);
}
[Benchmark]
public (ulong Step10, ulong Step8, ulong Step3, ulong Step5) ModMethodModulo()
{
UInt128 exponent128 = Exponent;
exponent128.Mod10_8_5_3(out ulong mod10, out ulong mod8, out ulong mod5, out ulong mod3);
ulong step10 = (mod10 << 1) % 10UL;
ulong step8 = (mod8 << 1) & 7UL;
ulong step3 = (mod3 << 1) % 3UL;
ulong step5 = (mod5 << 1) % 5UL;
return (step10, step8, step3, step5);
}
}