Source code on Github here: https://github.com/julien-c/PageRank-Fast

Or better, get rid of jQuery completely.

What do you have against jquery?

For something as straightforward as this, I think you shouldn't load jQuery and use native JS instead.

What about jQuery Retina (http://retina.tylercraft.com/ and https://github.com/tylercraft/jQuery-Retina)?

Does anyone know which font they use to generate text?

I think they serve the images from a CDN now, so load time should be fine (at least in my experience it is)

Can you please show an example? This is interesting.

Now make a Javascript implementation and I'll be forever grateful.