Absolutely zero clue about tufte and how to do it in code - FWIW, personally, I would just use the browser's built-in profiler. Usually, works like a charm.

thanks … my possibly far-fetched idea was to wire up tufte so that I could collect timing bundles from testers’s browsers too, since tufte lets you do whatever you want with the collected stats (print, ship to an endpoint, whatever).

Ah, right. Hmm, I can't think of any way other than a custom version of reg-sub that wraps re-frame.core/reg-sub and also calls profile on the handler function.

hm, yeah, that could work.

I did some modeling with tufte. Seemed excellent.