Hi Viet, > I have a performance issue with drawPolyline whenever I try to use it on an > array of 600K+ points. Typically with the default stroke I have very good > performance, 16ms for 600K+ points. However when I tried to draw a thicker > line, by setting graphics2d with a new BasicStroke, the plot couldn't even > renderer, it stuck consuming memory and I eventually have to kill the task. > Does anyone have any experience with this? Its just a guess, but I think this is because a different code-path is taken. For zero-width lines a PathStroker is used, whereas for more complex strokes it uses the ShapeSpanIterator.
Hmm, 600k sounds an awful lot - something a normal monitor should not even be able to display. (except you're trying to color it with polylines ^^) Is there a way to minimize the number of edges? You could try drawing the polyLine to a BufferedImage and blit that one later, with transparency this should give you the desired result. - Clemens
