gunnar has written several excellent articles about QGraphicsView and performance. Related to the topic e.g. "Qt Graphics and Performance - An Overview(Qt Graphics and Performance - An Overview)":http://labs.trolltech.com/blogs/2009/12/16/qt-graphics-and-performance-an-overview/ and "Qt Graphics and Performance - The Raster Engine(Qt Graphics and Performance - The Raster Engine)":http://labs.trolltech.com/blogs/2009/12/18/qt-graphics-and-performance-the-raster-engine/.
