Some info about swap times

Actually, it is possible to achieve excellent swap times - by using OpenGL rendering (--opengl).
However, frameless windows don't seem to work with opengl, and I noticed poor performance during heavy spell effects in OpenGL mode.


The reason Direct3D (default rendering mode) takes so long to resize/swap, is that the device has to be recreated from scratch, which means reloading all textures etc etc etc.
OpenGL handles this differently, so resizing a rendering surface in OpenGL is a minor operation that goes quickly.

Sadly though, it doesn't work at all with maximizer parameters at startup it seems.