Performance
4 posts tagged #web-vitals on DiCodeWeb, from fundamentals to production, newest first.
4 postsUpdated Sep 14, 2026
Installing Sentry is only step one. This is how I build real frontend observability: lab vs field data, RUM with web-vitals attribution, beacons that don't get lost, sampling, private source maps, taming noisy errors, linking traces to the backend with traceparent, PII scrubbing, p75 dashboards and deploy markers.
The three metrics Google uses to measure real user experience: how they're measured and calculated, why they matter for SEO, and a concrete process to find the real cause before you fix anything.
How fonts affect LCP and CLS, choosing font-display, preloading the critical font, subsetting with unicode-range for Vietnamese, variable fonts, self-hosting versus CDNs, fallback metric overrides and next/font in Next.js.
Which format to pick, how srcset and sizes let the browser choose, when to lazy-load and when not to, reserving space to avoid CLS, image CDNs, art direction with picture, and using next/image in Next.js 16.