I'm curious how Google evaluates pagespeed for SPAs. Initial payloads are inherently large (resulting in 5+ second load times), but subsequent requests are lightning fast, as these requests are handled by JS fetching data from the backend.
Does Google evaluate pages on a URL-by-URL basis, looking at the initial payload (and "slow"-ish load time) for each? Or do they load the initial JS+HTML and then continue to crawl from there?
Another way of putting it: is Googlebot essentially "refreshing" for each page and therefore associating each URL with a higher load time? Or will pages that are crawled after the initial payload benefit from the speedier load time?
Any insight (or speculation) would be much appreciated.
