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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 Microsoft.Xunit.Performance;
using System;
using System.Runtime.CompilerServices;
using Xunit;
[assembly: OptimizeForBenchmarks]
namespace Benchstone.BenchI
{
public static class AddArray2
{
#if DEBUG
public const int Iterations = 1;
#else
public const int Iterations = 50;
#endif
private const int Dim = 200;
private static T[][] AllocArray<T>(int n1, int n2)
{
T[][] a = new T[n1][];
for (int i = 0; i < n1; ++i)
{
a[i] = new T[n2];
}
return a;
}
private static
void BenchInner1(int[][] a, ref int nn)
{
int n;
int l, m;
n = nn;
for (int i = 1; i <= n; i++)
{
for (int j = (i + 1); j <= n; j++)
{
for (int k = 1; k <= n; k++)
{
l = a[i][k];
m = a[j][k];
unchecked
{
a[j][k] = l + m;
}
}
}
}
}
private static
void BenchInner2(int[][] a, ref int nn)
{
int n;
int l, m;
n = nn;
for (int i = 1; i <= n; i++)
{
for (int j = (i + 1); j <= n; j++)
{
for (int k = 1; k <= n; k++)
{
l = a[k][i];
m = a[k][j];
unchecked
{
a[k][j] = l + m;
}
}
}
}
}
[MethodImpl(MethodImplOptions.NoInlining)]
private static bool Bench(int[][] a)
{
int n = Dim;
for (int i = 1; i <= n; i++)
{
for (int j = 1; j <= n; j++)
{
a[i][j] = i + j;
}
}
BenchInner1(a, ref n);
n = Dim;
BenchInner2(a, ref n);
return true;
}
[Benchmark]
public static void Test()
{
int[][] array = AllocArray<int>(Dim + 1, Dim + 1);
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement())
{
for (int i = 1; i <= Iterations; i++)
{
Bench(array);
}
}
}
}
private static bool TestBase()
{
int[][] array = AllocArray<int>(Dim + 1, Dim + 1);
bool result = true;
for (int i = 1; i <= Iterations; i++)
{
result &= Bench(array);
}
return result;
}
public static int Main()
{
bool result = TestBase();
return (result ? 100 : -1);
}
}
}
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