Your PageSpeed Score Is Someone's Actual Experience

You've just shipped a site. It loads instantly on your machine, looks great, passes your internal checks. Then you run it through PageSpeed Insights and the mobile score comes back at 41. The instinct is to dismiss it. "Google throttles the test." "It's not a realistic environment." "My actual users aren't seeing this." Some of them are. What the Test Is Actually Simulating PageSpeed Insights uses Lighthouse under the hood, and Lighthouse doesn't test on your infrastructure or your device. It si