---
title: "Vercel Speed Insights, 12 June 2026"
description: "Core Web Vitals belong in the launch process, especially for SEO-heavy content pages."
type: "changelog"
locale: "en"
canonical: "https://agenticschool.dev/changelog/vercel-speed-insights-2026-06-12"
datePublished: "2026-06-12"
---

# Vercel Speed Insights, 12 June 2026

- Tool: Vercel
- Published: 2026-06-12
- Tags: Vercel, Performance
- Canonical URL: https://agenticschool.dev/changelog/vercel-speed-insights-2026-06-12
- Locale: en

> Core Web Vitals belong in the launch process, especially for SEO-heavy content pages.

Heavy embeds and admin bundles must stay separate from public pages. Core Web Vitals stay stable for SEO-heavy lessons only when third-party media loads lazily, admin code never lands in public routes, and layout boxes have fixed dimensions. Treat performance as part of shipping, not an afterthought.