blob: 1fcde440af8cd66099909bf118c4077cd222159c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// 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 Microsoft.Xunit.Performance;
namespace Functions
{
public static partial class MathTests
{
// Tests Math.Atan2(double, double) over 5000 iterations for the domain y: -1, +1; x: +1, -1
private const double atan2DoubleDeltaX = -0.0004;
private const double atan2DoubleDeltaY = 0.0004;
private const double atan2DoubleExpectedResult = 3926.99081698702;
[Benchmark]
public static void Atan2DoubleBenchmark()
{
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement())
{
Atan2DoubleTest();
}
}
}
public static void Atan2DoubleTest()
{
var result = 0.0; var valueX = 1.0; var valueY = -1.0;
for (var iteration = 0; iteration < iterations; iteration++)
{
valueX += atan2DoubleDeltaX; valueY += atan2DoubleDeltaY;
result += Math.Atan2(valueY, valueX);
}
var diff = Math.Abs(atan2DoubleExpectedResult - result);
if (diff > doubleEpsilon)
{
throw new Exception($"Expected Result {atan2DoubleExpectedResult,20:g17}; Actual Result {result,20:g17}");
}
}
}
}
|
