Content management systems (CMS) and the Core Web Vitals
WordPress (73.5%), Shopify (9.6%), Wix (6.5%), Drupal (3.7%), Joomla (2.9%), Squarespace (2.5%), and Adobe Commerce (1.2%): how the major CMS platforms compare on LCP, INP, and CLS.
6.5% of sites use Wix as their CMS, and 90% of those sites pass all three Core Web Vitals, against 71% of all sites.
9.6% of sites use Shopify as their CMS, and 96% of those sites have a good LCP, against 82% of all sites.
2.5% of sites use Squarespace as their CMS, and 99% of those sites have a good INP, against 95% of all sites.
6.5% of sites use Wix as their CMS, and 98% of those sites have a good CLS, against 88% of all sites.
Core Web Vitals pass rate
Sites with Wix as their CMS pass all three Core Web Vitals most often: 90%, against 71% of all sites. The biggest gap is LCP, 94% against 82%.
Sites with Shopify as their CMS have a good LCP most often: 96%, against 82% of all sites. Sites with WordPress as their CMS have it least often, at 70%.
Sites with Squarespace as their CMS have a good INP most often: 99%, against 95% of all sites. Sites with Joomla as their CMS have it least often, at 95%.
Sites with Wix as their CMS have a good CLS most often: 98%, against 88% of all sites. Sites with Adobe Commerce as their CMS have it least often, at 74%.
As their CMS usage
WordPress is the most used: 73.5% of sites. Wix is 6.5% of sites.
Where CMS platforms differ: the four LCP phases
Across the four LCP sub-parts in Chrome's field data, the largest gap between Shopify and WordPress sits in time to first byte (TTFB): 390 ms median for Shopify against 1130 ms for WordPress. Overall median field LCP is 1.3s for Shopify (TTFB 390 ms, load delay 587 ms, load duration 208 ms, render delay 298 ms) versus 1.9s for WordPress.
Across the four LCP sub-parts in Chrome's field data, the largest gap between Shopify and WordPress sits in time to first byte (TTFB): 390 ms median for Shopify against 1130 ms for WordPress. Overall median field LCP is 1.3s for Shopify (TTFB 390 ms, load delay 587 ms, load duration 208 ms, render delay 298 ms) versus 1.9s for WordPress.
Across the four LCP sub-parts in Chrome's field data, the largest gap between Shopify and WordPress sits in time to first byte (TTFB): 390 ms median for Shopify against 1130 ms for WordPress. Overall median field LCP is 1.3s for Shopify (TTFB 390 ms, load delay 587 ms, load duration 208 ms, render delay 298 ms) versus 1.9s for WordPress.
Across the four LCP sub-parts in Chrome's field data, the largest gap between Shopify and WordPress sits in time to first byte (TTFB): 390 ms median for Shopify against 1130 ms for WordPress. Overall median field LCP is 1.3s for Shopify (TTFB 390 ms, load delay 587 ms, load duration 208 ms, render delay 298 ms) versus 1.9s for WordPress.
Understanding CMS performance
Why managed SaaS platforms lead on out-of-the-box pass rates
Managed SaaS platforms control the entire delivery stack from edge CDN and HTTP/3 termination to automatic AVIF/WebP image transcoding and font-display rules. Wix (90% passing all three Core Web Vitals, 1.2s median LCP) and Shopify (88% passing all three, 1.3s median LCP) bake those defaults into the platform. Self-hosted platforms like WordPress (63% passing all three, 1.9s median LCP), Drupal (78%), and Adobe Commerce (61%) leave hosting, caching, and theme architecture to each site owner.
Focus on your platform's specific bottlenecks rather than migrating CMSes for performance alone. 63% of WordPress sites pass all three Core Web Vitals, proving that a well-configured self-hosted site with full-page edge caching, an HTML <code><img></code> hero, and restrained plugin scripts matches any SaaS platform. On WordPress, the biggest gains come from edge HTML caching (TTFB), replacing CSS background-image heroes with <code><img></code> tags, and removing blocking font and slider plugins. On Shopify (88% passing all three), the edge and image CDN are already fast, so optimization focuses on removing lazy-loading from the main banner and auditing third-party app scripts that hurt INP.
How as their CMS plays out per platform
What the field data shows when you isolate a single CMS or framework.
WordPress 65,939 sites WordPress is the largest CMS cohort in the dataset at 63% all-three Core Web Vitals pass rate.
Across 65,939 audited WordPress sites, 63% pass all three Core Web Vitals (LCP, INP, and CLS) simultaneously.
Shopify 8,634 stores Shopify storefronts record a 88% all-three CWV pass rate across 8,634 stores.
Across 8,634 audited Shopify storefronts, 88% pass all three Core Web Vitals (LCP, INP, and CLS) simultaneously.
React & Next.js 8,327 sites React & Next.js sites record a 76% all-three CWV pass rate across 8,327 sites.
Across 8,327 audited React & Next.js sites, 76% pass all three Core Web Vitals (LCP, INP, and CLS) simultaneously.
By Arjen Karel · 212,308 crawled sites (197,524 with all devices Chrome field data, 89,714 sites with as their CMS, October 2026). How we measured.