[mivade]

I don't know, and I find this rather frustrating. I write a lot of tools to monitor devices in the lab via a web interface and often want to see updates every 10-100 ms. The only library I have found that seems to be up to the task is [Flot](http://www.flotcharts.org/) (and I've looked into a lot of options). My main complaints about it are its reliance on jQuery (which I am not otherwise using) and its lack of recent development (although it seems fairly feature-complete).