Real-world data in PageSpeed Insights

PageSpeed Insights, as announced by software engineers Mushan Yang and Xiangyu Luo, has been updated to incorporate real-world data from the Chrome User Experience Report, enhancing its recommendations for developers. This update aligns the optimization score with actual page performance and introduces several elements to the PSI report, including a Speed score based on First Contentful Paint (FCP) and DOM Content Loaded (DCL) metrics. Pages are categorized as Fast, Average, or Slow, with a new Optimization score assessing performance headroom while maintaining page appearance and functionality. The report also features sections on Page Load Distributions and Page Stats, which provide insights into page performance relative to the dataset, and Optimization Suggestions for best practices, which remain hidden for fast pages. For more information and feedback, developers are encouraged to visit the forums and include the URL being evaluated.