Social Embeds Cost 8.6 Points of Good LCP

    Sites running embedded third-party widgets pass Core Web Vitals on 38.7% of mobile origins versus 42.7% without, with an 8.6-point loading penalty.

    Core Web Vitals pass rate, with and without embedded widgets (mobile)
    Without widgets
    42.7%
    With widgets
    38.7%

    Source: PageSpeed Matters analysis of 9.5 million origins with CrUX field data, mobile 75th percentile, mid-2026.

    A 4-point gap in overall pass, driven almost entirely by an 8.6-point drop in good loading.

    Good loading versus good responsiveness, with and without widgets (mobile)
    Good LCP with widgets
    60.5%
    Good LCP without
    69.1%
    Good INP with widgets
    91.4%
    Good INP without
    84.1%

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

    LCP takes the 8.6-point hit while INP runs higher on widget sites. The cost is a loading cost, and the higher INP is the site-type confound.

    Source: Social Embeds Cost 8.6 Points of Good LCP - PageSpeed Matters