Astro Passes Core Web Vitals on 48% of Sites. Next.js Manages 29.3%

    We matched Chrome field data to the meta-framework running on 490,000 sites. Astro passes Core Web Vitals on 48% of mobile sites, Next.js on 29%, Nuxt on 25%. The frameworks that ship less JavaScript to the browser win, and the gap is mostly responsiveness.

    Core Web Vitals pass rate by meta-framework (mobile)
    Astro48%
    Next.js (App Router)31.1%
    Next.js (all)29.3%
    Nuxt.js24.9%

    Source: PageSpeed Matters analysis of 490,000 origins with CrUX field data, May 2026. Web-wide mobile average is about 42% on the same basis.

    The static-first framework passes far more often than the full-hydration React and Vue ones.

    Good responsiveness (INP) by meta-framework (mobile)
    Astro88.9%
    Web-wide average82.5%
    Nuxt.js72.8%
    Next.js (all)66.3%

    Source: PageSpeed Matters analysis, mobile 75th-percentile field data, May 2026.

    The framework that hydrates least is the framework that responds fastest on a phone.

    Source: Astro Passes Core Web Vitals on 48% of Sites. Next.js Manages 29.3% - PageSpeed Matters