Google announced that from July 2018 - Mobile speed is a ranking factor.
While I am not sure how exactly this is measured, but google hints that the speed score is taken from the CrUX report.
the ranking methodology is based on a combination of three metrics as reported across mobile devices by the CrUX Report: First Contentful Paint, DOMContentLoaded and Onload.
The question is, is this score for each entire domain, so if a certain site has known slow pages will this effect the entire domain?
Or each page or path gets its own score?
Either way, A source to the answer would be helpful!