That looks amazing, nice job! I was trying to create a seb dashboard with several graphs each with a few hundred data points recently. None of the libraries felt "snappy" on a mobile device in terms of load time or responsivity. I ended up abandoning the proejct because of that, but if only I knew about this library at the time...

The only thing I wish µPlot had is support for tooltips rather than numbers in the legend, but that's a small price to pay for this level of performance.