ANSWERING COMMON QUESTIONS ABOUT INTERPRETING PAGE SPEED REPORTS

Summary from the TLDR Web Dev newsletter

Performance scores from Lighthouse in Chrome DevTools are sometimes different from Google’s PageSpeedInsights (PSI). This is because PSI uses real life data pulled from Chrome user experience reports, while Lighthouse uses different data. This post takes a closer look at how various performance tools audit and report on performance metrics like core web vitals, why the metric values could be different across different reports, and what that means about your website's real performance.