Totally. I just mean that logic has to live somewhere, whether in client-side JS or a server. It's not a great practice to just blindly render SVGs out of raw data.
Aha, I misunderstood — I'd thought you were thinking of rendering multiple small SVGs.
Good point, although decimation for sparklines shouldn't be that difficult: I've done completely stupid decimation (recursively split stopping whenever linear fit is close enough) for live GPS traces and (because people are only using them qualitatively) no one ever complained.
