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// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
using Microsoft.Xunit.Performance;
using System;
using System.Runtime.CompilerServices;
namespace PerfLabTests
{
public static class StackWalk
{
[Benchmark(InnerIterationCount = 1000)]
public static void Walk()
{
A(5);
}
[MethodImpl(MethodImplOptions.NoInlining)]
private static int A(int a) { return B(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int B(int a) { return C(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int C(int a) { return D(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int D(int a) { return E(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int E(int a) { return F(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int F(int a) { return G(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int G(int a) { return H(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int H(int a) { return I(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int I(int a) { return J(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int J(int a) { return K(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int K(int a) { return L(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int L(int a) { return M(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int M(int a) { return N(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int N(int a) { return O(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int O(int a) { return P(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int P(int a) { return Q(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int Q(int a) { return R(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int R(int a) { return S(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int S(int a) { return T(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int T(int a) { return U(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int U(int a) { return V(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int V(int a) { return W(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int W(int a) { return X(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int X(int a) { return Y(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int Y(int a) { return Z(a + 5); }
[MethodImpl(MethodImplOptions.NoInlining)]
private static int Z(int a)
{
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
GC.Collect(0);
return 55;
}
}
}
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