[Boost-users] boost::signal performance in boost 1.36 and VS2005

16 Sep 2008

      Hello,

I have made now a small test and I don't know if I make something wrong.
I have the following performance comparsion between a boost::function 
and a boost::signal.
Okay, I know that boost::signal has a lot of more functionality and for 
that it is for sure slower than boost::function. But 100times slower?

May be I do something wrong?
On my pc I have for boost::function a runtime of 728ms and for 
boost::signals a runtime of 64128ms
There is one slot used for signals.

Can anyone give me some hint what I do wrong?

my test program was:

class TestBind
{
public:

	int counter;

	void OnEventReceived(char b)
	{
		counter++;
	}
};

class TestSignal
{
public:

	int counter;

	void OnEventReceived(char b)
	{
		counter++;
	}
};

int _tmain(int argc, _TCHAR* argv[])
{
	TestBind testBind;
	PerformanceCounter timer;
	boost::function f = 		 
boost::bind(&TestBind::OnEventReceived,&testBind,_1);

	for(int i = 0; i < 100000000; i++)
	{
		f('a');
	}

	TestSignal testSignal;
	boost::signal sig;

	sig.connect(boost::bind(&TestSignal::OnEventReceived,&testSignal,_1));;

		for(int i = 0; i < 100000000; i++)
	{
		sig('a');
	}

}

Best regards
Hansjörg

[Boost-users] boost::signal performance in boost 1.36 and VS2005

Hansi