Facing performance issue with QGraphicsScene and QGraphicsview
In my application, i am drawing waveforms in QGraphicsScene using the addLine/lineto api calls. It requires few crore or even more number of lines to plot, resulting bigger scene bounding rect. But in this case, i am facing huge performance lag. Also, while scrolling in QGraphicsView, the system hangs, Is there any other better way to solve this issue?
I have used QPaintPath with addPath only. Total items in Graphics Scene is 5 only. I have a feel like, when we call to lineto repeatedly, at certain stage, this problem started coming. If the line count is 80,000 then it loading in milliseconds. If it is 8,00,000 means, then it is taking 5mins. If it is 80,00,000 then it hangs. Can we do any kind of optimization to improve the behavior or using OpenGL is advisable.