[Interest] efficient drawing advice

[Graham Labdon]

Hi
My application needs to display a series of 'traces'.
Each trace will consist of 5000+ points and there can be up to 50 traces.
I would be grateful of some pointers on how to do this in the most efficient way -
QPainter on a widget
Use of OpenGL
QGraphicsScene
Which of these will be the most efficient at displaying the data quickly?

Thanks for your time