Your Lighthouse Score Is Only Half the Story

A Lighthouse score of 95 feels great. Until you check what your actual users experience and find that 40% of them are getting a Poor LCP. How? Because Lighthouse runs in a controlled environment. Fixed CPU, fixed network, no browser extensions, cold cache. Your real users are on old Android phones, congested Wi-Fi, with 12 Chrome extensions installed. The test and reality can be very different. We just shipped Field Data in Ahoj Metrics to close that gap. You can now look up real Chrome user experience data for any domain or URL, right alongside your Lighthouse audits. What Is Field Data? The data comes from Google's Chrome User Experience Report (CrUX). It's an aggregated, anonymised dataset of real performance timings collected from Chrome users who have opted in to sharing usage statistics. When someone visits your site in Chrome, their browser quietly measures how long things take to load, how quickly the page responds to clicks, and how much the layout shifts around. Google aggreg