Preliminary findings…

On the median site, 54% of JavaScript is unused.

This is very slow to compute, so this is from the data I have so far (the Alexa “Top 3567”), while I’m still waiting on the Top 10K to finish. However, I don’t expect the results will change much. t.co/chrQv2YyRn

How to exclude resources loaded by extensions from showing up in the Network panel in DevTools:

-scheme:chrome-extension t.co/FgLFHNvq9H

🎞 This is what First Input Delay (FID) looks like.

The page looks ready, but the main thread is busy, so the browser can’t respond to my clicks.

FID approximates this by measuring the time between the first user interaction w/ page & when the browser actually responds. t.co/3UANd3uyWI

📊 Where is mobile faster than wifi? (and vice versa) 👇

In the US, wifi tends to be faster than mobile, but this is not a universal phenomenon. “In 41% of countries mobile was faster than wifi.”

Data source: @opensignal
opensignal.com/sites/opensignal-… t.co/wsdLwnBuY8