Realtime Visualisation Bottleneck With Pyqtgraph / PlotCurveItem

I am currently using pyqtgraph to visualize realtime data for 64 independent data traces/plots. While the speed is realtively good, I noticed a serious slow down if the sample buff

Solution 1:

The easiest solution is to activate the OpenGL mode i.e. install the PyOpenGL and PyOpenGL-accelerate modules and enable the OpenGL use. This way the createPath part is completely left out. I simply added the following block in my application:

try:
    import OpenGL
    pg.setConfigOption('useOpenGL', True)
    pg.setConfigOption('enableExperimental', True)
except Exception as e:
    print(f"Enabling OpenGL failed with {e}. Will result in slow rendering. Try installing PyOpenGL.")

With that my PC can draw 64 traces with 30000 datapoints without breaking a sweat.