#include "stdafx.h"


using namespace System;
ref class refclass
{
public:
	int i;
};
ref class refclass2
{
public:
	int i;
};

void a(Object^ obj)
{
	refclass^ i = static_cast<refclass^>(obj);
	i->i++;
}
void b(Object^ obj)
{
	refclass^ i = safe_cast<refclass^>(obj);
	i->i++;
}
void e(Object^ obj)
{
	refclass^ i = dynamic_cast<refclass^>(obj);
	if ( i != nullptr )
	{
		i->i++;
	}
}
void f(Object^ obj)
{
	refclass2^ i = dynamic_cast<refclass2^>(obj);
	if ( i != nullptr )
	{
		i->i++;
	}
}
void c(Object^ obj)
{
	try
	{
		refclass^ i = safe_cast<refclass^>(obj);
		i->i++;
	}
	catch(System::InvalidCastException^ e)
	{
	}
}
void d(Object^ obj)
{
	try
	{
		refclass2^ i = safe_cast<refclass2^>(obj);
		i->i++;
	}
	catch(System::InvalidCastException^ e)
	{
	}
}
int main()
{
	System::Diagnostics::Stopwatch^ wat = gcnew System::Diagnostics::Stopwatch();
	refclass^ r = gcnew refclass();
	Object^ obj = static_cast<Object^>(r);
	Int64 i;
	wat->Start();
	for ( i = 0; i < 999999999; i++)
	{
		a(obj);
	}
	wat->Stop();
	System::Console::WriteLine(wat->ElapsedMilliseconds);
	wat->Reset();
	wat->Start();
	for ( i = 0; i < 999999999; i++)
	{
		b(obj);
	}
	wat->Stop();
	System::Console::WriteLine(wat->ElapsedMilliseconds);
	wat->Reset();
	wat->Start();
	for ( i = 0; i < 999999999; i++)
	{
		c(obj);
	}
	wat->Stop();
	System::Console::WriteLine(wat->ElapsedMilliseconds);
	wat->Reset();
	wat->Start();
	for ( i = 0; i < 9999; i++)
	{
		d(obj);
	}
	wat->Stop();
	System::Console::WriteLine(wat->ElapsedMilliseconds);
	wat->Reset();
	wat->Start();
	for ( i = 0; i < 999999999; i++)
	{
		e(obj);
	}
	wat->Stop();
	System::Console::WriteLine(wat->ElapsedMilliseconds);
	wat->Reset();
	wat->Start();
	for ( i = 0; i < 999999999; i++)
	{
		f(obj);
	}
	wat->Stop();
	System::Console::WriteLine(wat->ElapsedMilliseconds);
}