GDI+ is slower more than GDI, that's true, especially region operation. In fact .net provide double buffer already, for example in picture box, seems form is either. So if you don't have ton of things to draw, GDI+ is ok. And I think you could track these code, find which part cost time more, then try to find other faster way to instead it of.Hope it could be help
And I think you could track these code, find which part cost time more, then try to find other faster way to instead it of.Hope it could be help