FCP
FCP measures when the first content is painted. It’s an early speed signal, though not a Core Web Vitals metric.
Definition
FCP (First Contentful Paint) measures when the browser renders the first piece of content (text/image/SVG). It indicates the start of visual feedback, but user-perceived speed is usually more tied to LCP and interaction metrics.
Why it matters
- Signals early visual feedback
- Helps diagnose TTFB and render-blocking issues
- Useful for performance debugging
How to implement
- Reduce TTFB via caching/CDN
- Minimize render-blocking CSS/JS
- Defer non-critical third-party resources
FAQ
Common questions about this term.