[C++11] Performance of casting and pointer

I played around with C++ trying to decrease build time by using pimpl and a base class.

Having some arbitrary base class in the pointer I need to cast it to the real data type when I wanna use it.
For the pointer I tried *, shared_ptr and unique_ptr and took times with and without casting.

Qt 5 on Android - getting started

For our master thesis we need a quite easy way to create applications for different platforms and systems. For now the main targets are Windows, Linux and Android. The simplest way would be HTML5. It should run here, there and probably everywhere. But the performance isn't that great for what we want to achieve. Java could be an option as long as we won't go in the direction of Apple. Another option is the use of something like Unity3D. But it is big, clunky and I won't be able to develop with it from my Linux machine.