I can. Well, on HighStock, but it's basically the same. With a couple tweaks (not really related to performance but possibly helping), it was incredibly performant except on some versions of IE. It came down to the performance of the javascript engine in the browser, and the bottleneck wasn't SVG but rather various calculations on the data to make it suitable for display. We had many thousands of points (up to a few series of up to 1 year of 15-minute meter data) and were doing aggregation client-side as well.