> Microsoft supports most of the proposals (event timing, element timing,
> isInputPending, layout instability) except some concern over LCP.
>
>
>
> Quoting an engineer working on large web apps:
>
> “I think this metric can be misleading. Although there was a switch from
> FMP to LCP (Largest), we should be careful assuming that the largest
> element is the most important to the user when measuring user experience. I
> might be wrong, but to me it feels like this metric was designed to support
> automated tools like LightHouse, without any developers’ annotations. “
>
Agreed. It seems as if LCP is being pushed as a key part of Web Vitals for
2020, and that rush is unfortunate. It would have been much easier for the
rest of the browser vendors to support that effort if FCP was used instead,
and work on LCP or something like it was refined through 2020 for later use.
best,
Benjamin