Irrlicht Engine

I add some code

// --- > driver->endScene();

int fps = driver->getFPS();

if (lastFPS != fps)
{
core::stringw tmp(L"ARToolkit Irrlicht OpenCV [");
tmp += driver->getName();
tmp += L"] fps: ";
tmp += fps;

device->setWindowCaption(tmp.c_str());
lastFPS = fps;
}

I see that Frame per ...