None of this is relevant, though. Simply simulating a globally slowed-down connection will tell you what's going to be a problem. And, really, common sense wil

None of this is relevant, though. Simply simulating a globally slowed-down connection will tell you what's going to be a problem. And, really, common sense will tell you what's going to be a problem, too -- if a site "needs" to load 100MB of ads and trackers and other JavaScript to display a couple kilobytes of actual text content, then you have a problem. A user on a slower connection is going to see that site take forever to load even if there's a CDN across the street.