Performance issue with live updates

Dear all,

I have noticed a performance limitation of the updated graphs when I try to implement the live updates (https://dash.plot.ly/live-updates) tutorial.

I implemented the tutorial example without changes and it works as expected, however I noticed that if I increase the number of data points the traces on the dashboard cease to display (axis is rendered but no lines/markers are visible) when the number of points is greater than approximately 2000 (I used trial and error to find values that worked).

I tried changing the figure ‘type’ parameter to ‘scattergl’, but this was ineffective. This behaviour is observed in Chrome, Firefox and internet explorer.

If I increase the update interval time to e.g 5 seconds, I can plot 10,000 data points, but this is not very satisfactory as I am trying to base my own application on this approach but I need to plot e.g 24 hours worth of data at 1 second intervals, refreshing the graph with new data every 1-2 seconds.

Is this performance limitation expected and is there a way to improve this performance?

Use the Dash live-updates tutorial linked in the report as the reproduction entry point. Vary the data-point count and update interval in Chrome, Firefox, and Internet Explorer, including the reported scattergl attempt; done means explaining or resolving the missing traces at 1–2 second refresh intervals, or documenting the supported limit.