The Core Web Vitals Technology Report by the open source HTTPArchive community ranks content management systems by how well they perform on Google’s Core Web Vitals (CWV). The November 2025 data shows a significant gap between platforms with the highest ranked CMS scoring 84.87% of sites passing CWV, while the lowest ranked CMS scored 46.28%.
What’s of interest this month is that the top three Core Web Vitals champs are all closed source proprietary platforms while the open source systems were at the bottom of the pack.
How the Data Is Collected
The CWV Technology Report combines two public datasets.
The Chrome UX Report (CrUX) uses data from Chrome users who opt in to share performance statistics as they browse. This reflects how real users experience websites.
The HTTP Archive runs lab-based tests that analyze how sites are built and whether they follow performance best practices.
Together, the report I generated provides a snapshot of how each content management system performs on Core Web Vitals.
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