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.

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