Vitesse
Indications de ressources
Pourquoi c’est important
Before a browser can download a file from another origin it must resolve DNS, connect and negotiate TLS. A preconnect hint starts that work early for origins you know you will need, such as a font or image CDN.
Comment corriger
- Add <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin> for the one or two most important origins.
- Do not preconnect to many origins. Each unused connection wastes resources.
Vérifier avec
- Page Speed Test – Lighthouse performance score, lab metrics and real-user Core Web Vitals for any page.
Score : un contrôle réussi obtient tout son poids, un avertissement la moitié et une erreur rien. Fonctionnement du score SEO