34 lines
1.0 KiB
C#
34 lines
1.0 KiB
C#
using BenchmarkDotNet.Attributes;
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using BenchmarkDotNet.Jobs;
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using PerfectNumbers.Core;
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namespace EvenPerfectBitScanner.Benchmarks;
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[SimpleJob(RuntimeMoniker.Net80, launchCount: 1, warmupCount: 1, iterationCount: 5)]
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[MemoryDiagnoser]
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public class Mod5UInt128Benchmarks
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{
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[Params(5UL, 8191UL, 131071UL, 2147483647UL, ulong.MaxValue - 31UL)]
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public UInt128 Value { get; set; }
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/// <summary>
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/// `% 5` baseline; ran at 2.84-2.93 ns (2.840 ns at value 5, 2.874 ns at 8191, 2.870 ns at 131071, 2.895 ns at 2147483647,
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/// 2.927 ns near ulong.Max).
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/// </summary>
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[Benchmark(Baseline = true)]
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public ulong ModuloOperator()
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{
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return (ulong)(Value % 5UL);
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}
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/// <summary>
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/// Extension helper that folds high and low halves; trimmed execution to 0.47-0.49 ns (0.4706 ns at value 5, 0.4691 ns at
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/// 8191, 0.4644 ns at 131071, 0.4847 ns at 2147483647, 0.4669 ns near ulong.Max), about 6x faster.
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/// </summary>
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[Benchmark]
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public ulong ExtensionMethod()
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{
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return Value.Mod5();
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}
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}
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