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Run with --video to replay what the user saw frame by frame. The verdict and fixes below don't need it.
Want to see how much CSS style-recalculation work delayed FCP and LCP, plus CPU long tasks? Run with --cpu.
--enableProfileRun to see where main-thread time went, blocking time and CPU cost per script, module and function, forced reflows and frame stability. The data is collected in one extra run, so the timing metrics of your measured runs stay untouched.|loadingExperience PHONE | | loadingExperience DESKTOP | | loadingExperience TABLET | | loadingExperience ALL | |
Chrome User Experience Report (CrUx) is real-user data from opted-in Chrome users, aggregated over the last 30 days. Toggle the form factor with--crux.formFactor.