Mobile vs Desktop Speed: 84% of the Top 500 Sites Are Slower on Mobile

    84% of the top 500 sites load slower on mobile than desktop, and only 44% pass Core Web Vitals on mobile vs 64% on desktop.

    Median Interaction to Next Paint (INP): mobile vs desktop, ms
    Mobile
    188 ms
    Desktop
    76 ms

    Source: PageSpeed Matters analysis of Chrome UX Report data for top 500 Tranco-ranked domains, June 2026.

    75th-percentile values; Google's "good" threshold is 200 ms.

    Core Web Vitals pass rate: mobile vs desktop (top 500 sites)
    Mobile
    44%
    Desktop
    64%

    Source: PageSpeed Matters analysis of Chrome UX Report data for top 500 Tranco-ranked domains, June 2026.

    A site passes only when LCP, INP, and CLS are all good at the 75th percentile.

    Source: Mobile vs Desktop Speed: 84% of the Top 500 Sites Are Slower on Mobile - PageSpeed Matters