It can go to the existing PaintTiming schema (although technically LargestContentfulPaint is its own API): https://wicg.github.io/largest-contentful-paint/
While it's likely to be the same as First Paint and First ContentfulPaint > 95% of the time based on our previous observations, it's important for us to collect the same metrics as Google, to let us investigate metric changes observed in the Search Console.
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Resolved | Peter | T290019 Review navigation timing extension | |||
| Open | None | T319329 Expand navigation timing metrics to include user experience metrics and modernise navigation timing | |||
| Resolved | Peter | T281022 Collect Largest Contentful Paint |
@cmassaro removing you as assigned to this, me or someone else can take this up soon.
I think what we should collect is the actual timing metric + element type. That way we can keep a track of the metric and have a counter in prometheus for the element type, so we can see if the element is a img/p or whatever it is.
Change 859534 had a related patch set uploaded (by Phedenskog; author: Phedenskog):
[schemas/event/secondary@master] Add largest contentful paint schema.
Change 859534 abandoned by Phedenskog:
[schemas/event/secondary@master] Add largest contentful paint schema.
Reason:
Lets add this to navtiming.
Change 859968 had a related patch set uploaded (by Phedenskog; author: Phedenskog):
[schemas/event/secondary@master] navtiming: Add cumulative layout shift and largest contentful paint.
Change 860822 had a related patch set uploaded (by Phedenskog; author: Phedenskog):
[mediawiki/extensions/NavigationTiming@master] Add largest contentful paint.
Change 860823 had a related patch set uploaded (by Phedenskog; author: Phedenskog):
[mediawiki/extensions/NavigationTiming@master] Add largest contentful paint.
Change 860822 abandoned by Phedenskog:
[mediawiki/extensions/NavigationTiming@master] Add largest contentful paint.
Reason:
Ooop, I updated the change id
Change 860823 abandoned by Phedenskog:
[mediawiki/extensions/NavigationTiming@master] Add largest contentful paint.
Reason:
Close and get correct dependencies
Change 860822 restored by Phedenskog:
[mediawiki/extensions/NavigationTiming@master] Add largest contentful paint.
Change 860826 had a related patch set uploaded (by Phedenskog; author: Phedenskog):
[mediawiki/extensions/NavigationTiming@master] Add largest contentful paint.
Change 860822 abandoned by Phedenskog:
[mediawiki/extensions/NavigationTiming@master] Add largest contentful paint.
Reason:
Change 860826 abandoned by Phedenskog:
[mediawiki/extensions/NavigationTiming@master] Add largest contentful paint.
Reason:
Change 859968 merged by jenkins-bot:
[schemas/event/secondary@master] navtiming: Add cumulative layout shift and largest contentful paint.
Change 861343 had a related patch set uploaded (by Phedenskog; author: Phedenskog):
[performance/navtiming@master] Add cumulative layout shift and largest contenful paint.
Change 861343 merged by jenkins-bot:
[performance/navtiming@master] Add cumulative layout shift and largest contenful paint.