It's much heavier but a lot more powerful and flexible.

Thanks! And is it more or less performant on large datasets (100k+ data points).

maintainer of chartjs here.

It’s probably more performant. Chart.js isn’t designed for a ton of data and we recommend sampling before visualization . We have a builtin plugin that does a form of min/max sampling to retain peaks but cut down on the amount of data points drawn

Hey! Thanks for maintaining chartjs :)

maintainer of uPlot here :)

they're about same for line chart rendering when using decimation in both.

Wow, that's cool, thanks for working on it, I've been using Chart.js for many years :)

Performance seemed quite good with Chart.js in my case, for small to medium datasets.

The biggest difference I'm aware of is that ECharts has an add-on for 3D charts (echarts-gl). Chart.js doesn't have any 3D functionality.

(Our project mostly uses Chart.js, so I'm more familiar with it.)