I have a question about using Qwt with quite large number of samples. We can easily create a plot by using setSamples from QwtPlotCurve. But what if our plot has like 1000 pixels in width and we have 5 million samples? Is QwtPlotCurve smart enough to pick 1000 adequate samples from 5 million? And if so - is it smart enough to make it efficient? For example using multiple threads to do the job faster? Or maybe there is something in Qwt that is worth using in such case without writing sample selection myself?