My SEO knowledge is a few years out of date, but when I ran sites with AdSense, it hugely increased the page weight and load time. Google's own tools would din

My SEO knowledge is a few years out of date, but when I ran sites with AdSense, it hugely increased the page weight and load time. Google's own tools would ding me PageSpeed Insights score for some of the scripts, even though they were loaded async. GA would tell me I had 8+s average page load; when tested from slow connections, it would never be more than a couple sec.