Core Web Vitals

Core Web Vitals are three specific metrics Google uses to measure page experience: Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP). LCP measures how long it takes for the largest visible content element to load. CLS measures how much the page layout shifts unexpectedly during load. INP measures how quickly the page responds to user interactions like clicks or taps.

Google incorporated Core Web Vitals into its ranking algorithm as part of the Page Experience update. A site that scores well across all three metrics has an advantage over an otherwise comparable site that scores poorly — though content relevance and authority still weigh more heavily in most cases.

WordPress and Core Web Vitals

WordPress sites vary widely in performance. A well-optimized WordPress install with a lightweight theme and minimal plugins can score well on Core Web Vitals. But many WordPress sites accumulate technical debt: page builders that load excessive JavaScript, plugins that add render-blocking scripts, unoptimized images, and themes built without performance in mind. These are common sources of poor Core Web Vital scores.

Plugins like WP Rocket, LiteSpeed Cache, and Perfmatters address some of these issues, but they’re working around a fundamentally dynamic, PHP-rendered architecture rather than solving it at the source.

How Statamic Compares

Statamic doesn’t automatically produce faster sites, but it creates better conditions for performance. When you build templates from scratch (or use a well-built starter kit), you’re not inheriting a theme’s bloated asset pipeline. Statamic’s static caching feature can serve pages as pre-rendered HTML with no PHP execution per request, which has a significant impact on LCP and time to first byte.

The flat-file architecture of Statamic’s flat-file CMS mode also means no database queries on page load, which removes one layer of latency. Combined with a CDN and image optimization, Statamic sites can score very well on Core Web Vitals without heroic effort.

That said, the same problems that hurt WordPress sites can hurt Statamic sites too if you load unnecessary JavaScript, use poorly optimized images, or serve assets without caching. The tools are cleaner, but performance still requires intentional choices.

If improving Core Web Vitals is part of your motivation for migrating, it’s worth doing a baseline measurement of your current WordPress site before you start, so you can compare accurately after launch. Google PageSpeed Insights and the Chrome User Experience Report both provide real-world data rather than lab estimates.