ah hi! I made this! was wondering if this one would appeal to the HN crowd :)
Happy to answer any questions! And here are a couple of scattered thoughts:
* I'm really interested in what this looks like if you use animations (firefox supports animated favicons) - I could, for example, anticipate future ball positions and create animated SVGs to get a much nicer framerate.
* A friend pointed out offline that canvas rasterization (typically) is on the GPU, which is probably why my performance intuitions with my stuttering animation were so wrong
* I am only moderately confident that chrome caps favicon updates to 4 a second; I know there are a lot of different ways to update favicons and I could have missed something here!
Happy to answer any questions! And here are a couple of scattered thoughts: