Forum › White Hat SEO › Pagespeed – does Google look at individual pages or the entire site? › Reply To: Pagespeed – does Google look at individual pages or the entire site?
Each page is rated for speed individually, *and* the entire website is rated by its slowest page. Page rating is a signal, while site’s speed rating is more of a tie breaker.
In your case, 20 pages will improve, but if they somehow get to compete with other pages that have identical ranking signals, the other 180 will hold them back.