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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.
// Strings are the only ref class where there is built-in support for
// constant objects.
using Microsoft.Xunit.Performance;
using System;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Reflection;
using System.Collections.Generic;
using Xunit;
[assembly: OptimizeForBenchmarks]
[assembly: MeasureInstructionsRetired]
public static class ConstantArgsString
{
#if DEBUG
public const int Iterations = 1;
#else
public const int Iterations = 100000;
#endif
// Ints feeding math operations.
//
// Inlining in Bench0xp should enable constant folding
// Inlining in Bench0xn will not enable constant folding
static string Ten = "Ten";
static string Five = "Five";
static string Id(string x)
{
return x;
}
static char F00(string x)
{
return x[0];
}
static bool Bench00p()
{
string t = "Ten";
char f = F00(t);
return (f == 'T');
}
static bool Bench00n()
{
string t = Ten;
char f = F00(t);
return (f == 'T');
}
static int F01(string x)
{
return x.Length;
}
static bool Bench01p()
{
string t = "Ten";
int f = F01(t);
return (f == 3);
}
static bool Bench01n()
{
string t = Ten;
int f = F01(t);
return (f == 3);
}
static bool Bench01p1()
{
return "Ten".Length == 3;
}
static bool Bench01n1()
{
return Ten.Length == 3;
}
static bool Bench02p()
{
return "Ten".Equals("Ten", StringComparison.Ordinal);
}
static bool Bench02n()
{
return "Ten".Equals(Ten, StringComparison.Ordinal);
}
static bool Bench02n1()
{
return Ten.Equals("Ten", StringComparison.Ordinal);
}
static bool Bench02n2()
{
return Ten.Equals(Ten, StringComparison.Ordinal);
}
static bool Bench03p()
{
return "Ten" == "Ten";
}
static bool Bench03n()
{
return "Ten" == Ten;
}
static bool Bench03n1()
{
return Ten == "Ten";
}
static bool Bench03n2()
{
return Ten == Ten;
}
static bool Bench04p()
{
return "Ten" != "Five";
}
static bool Bench04n()
{
return "Ten" != Five;
}
static bool Bench04n1()
{
return Ten != "Five";
}
static bool Bench04n2()
{
return Ten != Five;
}
static bool Bench05p()
{
string t = "Ten";
return (t == t);
}
static bool Bench05n()
{
string t = Ten;
return (t == t);
}
static bool Bench06p()
{
return "Ten" != null;
}
static bool Bench06n()
{
return Ten != null;
}
static bool Bench07p()
{
return !"Ten".Equals(null);
}
static bool Bench07n()
{
return !Ten.Equals(null);
}
static bool Bench08p()
{
return !"Ten".Equals("Five", StringComparison.Ordinal);
}
static bool Bench08n()
{
return !"Ten".Equals(Five, StringComparison.Ordinal);
}
static bool Bench08n1()
{
return !Ten.Equals("Five", StringComparison.Ordinal);
}
static bool Bench08n2()
{
return !Ten.Equals(Five, StringComparison.Ordinal);
}
static bool Bench09p()
{
return string.Equals("Ten", "Ten");
}
static bool Bench09n()
{
return string.Equals("Ten", Ten);
}
static bool Bench09n1()
{
return string.Equals(Ten, "Ten");
}
static bool Bench09n2()
{
return string.Equals(Ten, Ten);
}
static bool Bench10p()
{
return !string.Equals("Five", "Ten");
}
static bool Bench10n()
{
return !string.Equals(Five, "Ten");
}
static bool Bench10n1()
{
return !string.Equals("Five", Ten);
}
static bool Bench10n2()
{
return !string.Equals(Five, Ten);
}
static bool Bench11p()
{
return !string.Equals("Five", null);
}
static bool Bench11n()
{
return !string.Equals(Five, null);
}
private static IEnumerable<object[]> MakeArgs(params string[] args)
{
return args.Select(arg => new object[] { arg });
}
public static IEnumerable<object[]> TestFuncs = MakeArgs(
"Bench00p", "Bench00n",
"Bench01p", "Bench01n",
"Bench01p1", "Bench01n1",
"Bench02p", "Bench02n",
"Bench02n1", "Bench02n2",
"Bench03p", "Bench03n",
"Bench03n1", "Bench03n2",
"Bench04p", "Bench04n",
"Bench04n1", "Bench04n2",
"Bench05p", "Bench05n",
"Bench06p", "Bench06n",
"Bench07p", "Bench07n",
"Bench08p", "Bench08n",
"Bench08n1", "Bench08n2",
"Bench09p", "Bench09n",
"Bench09n1", "Bench09n2",
"Bench10p", "Bench10n",
"Bench10n1", "Bench10n2",
"Bench11p", "Bench11n"
);
static Func<bool> LookupFunc(object o)
{
TypeInfo t = typeof(ConstantArgsString).GetTypeInfo();
MethodInfo m = t.GetDeclaredMethod((string) o);
return m.CreateDelegate(typeof(Func<bool>)) as Func<bool>;
}
[Benchmark]
[MemberData(nameof(TestFuncs))]
public static void Test(object funcName)
{
Func<bool> f = LookupFunc(funcName);
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement())
{
for (int i = 0; i < Iterations; i++)
{
f();
}
}
}
}
static bool TestBase(Func<bool> f)
{
bool result = true;
for (int i = 0; i < Iterations; i++)
{
result &= f();
}
return result;
}
public static int Main()
{
bool result = true;
foreach(object[] o in TestFuncs)
{
string funcName = (string) o[0];
Func<bool> func = LookupFunc(funcName);
bool thisResult = TestBase(func);
if (!thisResult)
{
Console.WriteLine("{0} failed", funcName);
}
result &= thisResult;
}
return (result ? 100 : -1);
}
}
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