>For in-the-wild input delay not specifically during pageload we also >measure INPUT_EVENT_RESPONSE_DELAY_MS[1] and (from Firefox 53-60 and then >resuscitated in 64) INPUT_EVENT_RESPONSE_COALESCED_MS[2] which record[3] >from the time the OS created the input event until the time when the >process is done with the event.
Sure, those are interesting... though it's the tail that's generally the concerning part here - and most of the tail will be during-pageload. (and those that aren't can actually be interesting for other reasons). MID is intended for automation and to a lesser extent for investigation of responsiveness on specific pages, or for devtools (so developers can see how their page is working). It's arguable how useful this is in telemetry - though I think it might be worth tracking there, at least for a while to compare. -- Randell Jesup, Mozilla Corp remove "news" for personal email _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
