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CosPi.cs
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CosPi.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using BenchmarkDotNet.Attributes;
namespace System.MathBenchmarks
{
public partial class Double
{
// Tests double.CosPi(double) over 5000 iterations for the domain 0, PI
private const double cosPiDoubleDelta = 0.0006283185307180;
private const double cosPiDoubleExpectedResult = -218.94441504588787;
[Benchmark]
public void CosPi() => CosPiDoubleTest();
public static void CosPiDoubleTest()
{
double result = 0.0, value = 0.0;
for (int iteration = 0; iteration < MathTests.Iterations; iteration++)
{
value += cosPiDoubleDelta;
result += double.CosPi(value);
}
double diff = Math.Abs(cosPiDoubleExpectedResult - result);
if (diff > MathTests.DoubleEpsilon)
{
throw new Exception($"Expected Result {cosPiDoubleExpectedResult,20:g17}; Actual Result {result,20:g17}");
}
}
}
}