What means FP in CrUX Community Dashboard?

Question

CrUX Community Dashboard provides on the page 7 metric named FP / First Paint. But I can't find at web.dev any metric with this name.

However, under web.dev there is a metric named First Meaningful Pant. On comparing First Paint and First Meaningful Paint, one realizes,

• First Paint on the page 7 of CrUX Dashboard has following ranges: Good (< 1s), Poor (>= 3s),
• while First Meaningful Paint's ranges, listed at web.dev, are: Good (< 2s), Poor (>= 4s).

Is it an error in the CrUX Community Dashboard and Firts Paint should be First Meaningful Paint? Or miss I something?

Answer 1

CrUX metrics are defined in more detail in the official docs, for example First Paint is defined as:

First Paint reports the time when the browser first rendered after navigation. This excludes the default background paint, but includes non-default background paint. This is the first key moment developers care about in page load – when the browser has started to render the page.

— Paint Timing API

See https://web.dev/first-meaningful-paint/ for more info on FMP, which is now a deprecated metric.

Also see this related answer on SO: https://stackoverflow.com/a/47788460/1022333