#Core Web Vitals

Optimizing Largest Contentful Paint on an Image-Heavy Site

Learn how to achieve sub-1.2s Largest Contentful Paint (LCP) on image-heavy web applications using fetchpriority='high', AVIF formats, and CDN image optimization.

Benchmarking a Real App Before and After Moving to the Edge

The empirical Edge performance audit. Benchmarking TTFB, Core Web Vitals (LCP/INP), global latency, and database query roundtrips before and after Edge migration.

Optimizing LCP: CSS content-visibility for Heavy Layouts

Off-screen rendering is a silent performance killer. Discover how the CSS content-visibility property optimizes Largest Contentful Paint (LCP) by skipping layout calculations.

The Next.js 15 Performance Audit: A 20-Point Checklist for Sub-Second LCP

Your Next.js app is slow and you don't know why. This battle-tested 20-point audit checklist covers everything from Server Component boundaries to image optimization, font loading, and bundle analysis — with before/after metrics from real production sites.

Optimizing Core Web Vitals in 2026: Mastering Interaction to Next Paint (INP)

Ditch slow interfaces. A comprehensive technical guide to diagnosing, debugging, and mastering Google's responsiveness metric: Interaction to Next Paint.

JavaScript Bundle Size Budgets in 2026: Enforcing CI Guardrails Without Breaking Builds