2.4 The 15 features (key a), request #1

Order = order of the extractor list in the script, letters a to o; the names are the script's own. calc ms = syncDuration + (result.async ? timeFromAfterItsSyncCallUntilItsThenRuns : 0), rounded to 5 significant digits. All 15 extractors are started one after the other in one synchronous loop and their then callbacks run only after that loop has finished. For the two extractors that flag their result as async (fonts, ad-blocker) calc runs from right after their synchronous call until their then callback runs, so it also covers whatever keeps the thread busy until then. Fonts: their own synchronous run plus the synchronous time of the extractors started after them (mostly the canvas). Ad-blocker, when not cached: about the 20 ms timer, or longer when the later extractors keep the thread busy longer (it is not the sum of the two); cached, it has no 20 ms wait. For all other extractors calc is just the duration of their own synchronous call. active ms (key at) exists only for fonts and ad-blocker: it is the number they report themselves, and the key is left out when that number is 0 or missing, so 13 of the 15 extractors never have it. Fonts report: storage check + the 3 base measurements + only those 50 ms slices that yielded (the last slice is never added). The ad-blocker reports: creating the div + the work after its 20 ms timer, without the wait. A cached result has a tiny active time, but its calc still contains the waiting described above.

Device metric

Part 1 · What was sent (raw, uncut)

Part 2 · How it is made (to reproduce it exactly)