It is a miss match in navtiming2 what is sent from the user (mediaWikiLoadComplete) but the code expect mediaWikiLoadEnd and mediaWikiLoadStart (and then calculate the newly named mediaWikiLoad). Let me fix that so we can soon start use the schema.
|Open||None||T99060 Create a dashboard of key user-centric metrics|
|Resolved||Peter||T104902 Refactor Navigation Timing gathering to produce reliable stackable measures (aka "frontend.navtiming2")|
|Resolved||Peter||T180598 NavigationTimingv2 misses mediaWikiLoadComplete|
Using mediaWikiLoad looks good, yeah.
As for needing the others, yes and no :) Yes, we do want one of them (mediaWikiLoadEnd), because per T160315 this event would be more useful as an offset instead of a delta. But the current client code only sends mediaWikiLoadComplete (a delta). It does have mediaWikiLoadStart/End, but those are not sent, so.. no we don't need those in webperf.py right now.