Performance extensions for D3.js

I _know_ I should use it, but every time I try to, I lose myself in it, and end up using Flot instead :(

edit: The library looks pretty slick though--I like the fluent interface for describing a chart, and how it doesn't try to hide the lower level D3 functions. Here's a an example I found on their github: https://github.com/alexandersimoes/d3plus/blob/master/exampl...

http://nvd3.org

Not so much performance extensions as simplifications... hopefully the title of the post can be adjusted.