TODO (low priority): speed up the front page

[moritz]

To avoid loading ~80 small PNGs, we could generate single JSON file with all the data, and then load and graph it through javascript.

Another option to speed up rendering the front page would be to enable HTTP/2 in the server.

[moritz]

Here is a data file that can be used to render such images: https://irclog.perlgeek.de/s/images/index/plots.json