Chart update speed for real time electronic signals/ communication engineering related

[davidz]

This is a well-known problem with Node-RED chart. The chart uses and old chart.js (please correct me if I am wrong) library, which is extremely slow.
Not sure if upgrading to Chart.js 3.0 or higher can solve the problem easily.

Alternatively, there is a post about using U-plot instead of the chart node to draw the signal faster:

u-Plot charts simple live data example

You'll need to download the needed files from here GitHub - leeoniya/uPlot: A small, fast chart for time series, lines, areas, ohlc & bars and then serve them from your static folder. If performance matters and you are ready for a bit of JavaScript struggle, It is the way to go. Here's the starting point [{"id":"d03aad8c.fcdf9","type":"ui_template","z":"c0ddb509.b04f48","group":"304730.1de8e8d","name":"chart","order":1,"width":"15","height":"8","format":"<script src=\"/uplot/uPlot.iife.mi…