I'm using Qwt for my analysis, and it works fine on small data samples. When it comes to large blocks of data however, it simply crashes (rather than just take a lot of memory). I have a big chunk of audio data (several minutes worth) that I am trying to plot as a waveform. I could pre-process the data, but that would ruin Qwt's nice built-in zooming capabilities. Is this just a serious short-coming of Qwt, or am I missing an important feature?