We hold every build to stricter-than-Google targets: Largest Contentful Paint under 2.0s, Interaction to Next Paint under 200ms, and Cumulative Layout Shift under 0.1 — measured on real mid-tier phones, not a developer's laptop.
Three metrics, one promise: it feels fast
Core Web Vitals boil the messy question of “is this site fast?” into three numbers Google measures on real visitors: how quickly the main content appears (LCP), how responsive it feels to input (INP), and how much the layout jumps around while loading (CLS).
The numbers we hold every build to
Google calls 2.5 seconds “good” for LCP. We hold builds to 2.0 on a mid-range phone over real mobile data — because “good enough for the algorithm” and “fast to a human” are not the same bar.
Where the wins actually come from
Performance work isn't mysterious. Four levers do most of the job:
- Images — right format (AVIF/WebP), right size, lazy-loaded below the fold. Usually the single biggest LCP win.
- Fonts — preloaded, subset, with sensible fallbacks so text never blocks or reflows.
- JavaScript — ship less, defer the rest. The main cause of poor INP.
- Layout — explicit dimensions on media and embeds so nothing shifts (CLS).
Most 'slow' sites aren't slow everywhere — they're slow at the one moment the user is watching.
Lab scores lie; we test on real devices
A perfect Lighthouse score on a developer's laptop means little. Field data — real phones, real networks — is what Google ranks on and what your customers feel. We profile on throttled mid-tier devices and watch the 75th-percentile visitor, not the best case.
- →Core Web Vitals = LCP (loading), INP (responsiveness), CLS (stability).
- →Our targets are stricter than Google's: LCP <2.0s, INP <200ms, CLS <0.1.
- →Biggest wins: optimized images, disciplined fonts, and less JavaScript.
- →Judge performance on real mid-tier devices and field data, not lab scores.
Frequently asked questions
What replaced First Input Delay?+
Interaction to Next Paint (INP) replaced FID in 2024 as a Core Web Vital. INP measures responsiveness across all interactions, not just the first — a stricter, more realistic bar.
Do Core Web Vitals affect SEO rankings?+
Yes — they're a confirmed ranking signal: modest but real, and a tie-breaker in competitive results. More importantly, they directly affect conversion and bounce rate.
What's a good LCP time?+
Google considers under 2.5 seconds "good." We build to under 2.0 seconds on mid-range mobile, because faster load correlates directly with higher conversion.
How do you test performance?+
We use field data (real-user metrics) plus lab profiling on throttled mid-tier devices, focusing on the 75th-percentile visitor rather than an ideal laptop.
Nexora designs and builds websites in-house — fast, accessible, and measured on real devices, not a developer's laptop.
Work with our team
