Site Performance
Definition
Section titled “Definition”Performance standards and techniques to keep pages fast and responsive.
Schema / Parameters
Section titled “Schema / Parameters”- Budgets: LCP ≤ 2.5s, CLS ≤ 0.1, INP ≤ 200ms, TTFB ≤ 0.8s.
- Media: modern formats (AVIF/WebP), responsive sizes, lazy-load below fold.
- CSS/JS: critical CSS inline, code-split, defer non-critical scripts.
- Caching: long-lived immutable assets, HTML cached where safe, CDN.
- Fonts: system-first, preconnect/preload, swap strategy.
Defaults
Section titled “Defaults”- Avoid render-blocking; minimize third-party scripts.
Examples
Section titled “Examples”- Image component with srcset + sizes; route-level code splitting.
Limits
Section titled “Limits”- Trade-offs with interactivity; test real-user metrics regularly.