Headless Commerce Speed 2026: Pass Rate Falls to 19.0%

    249 stores that moved from WooCommerce, Magento or Shopify to a Next.js front end went from a 34.7% Core Web Vitals pass rate to 19.0%.

    Headless commerce moves: share of months with a good score, before vs after
    CWV pass before31.6%
    CWV pass after18.1%
    Good INP before67.3%
    Good INP after40.3%
    Good CLS before70.8%
    Good CLS after52%
    Good LCP before48.1%
    Good LCP after56.6%

    Source: PageSpeed Matters. HTTP Archive top 1M crawls and CrUX, Sept 2024 to Sept 2026; 306 stores.

    Wider 306-store group, including Salesforce Commerce Cloud and Nuxt moves.

    Source: Headless Commerce Speed 2026: Pass Rate Falls to 19.0% - PageSpeed Matters