Web Performance Optimization: Core Web Vitals Guide

Google uses Core Web Vitals as a ranking factor. Sites with good CWV scores see 24% fewer user abandonments (Google Chrome UX Report, 2024).

The Three Core Web Vitals

LCP (Largest Contentful Paint) — Loading
  Good: ≤ 2.5s | Poor: > 4.0s

INP (Interaction to Next Paint) — Interactivity
  Good: ≤ 200ms | Poor: > 500ms

CLS (Cumulative Layout Shift) — Visual Stability
  Good: ≤ 0.1 | Poor: > 0.25

Image Optimization

Font Optimization

JavaScript Optimization

const Dashboard = () => import('./pages/Dashboard.vue');

requestIdleCallback(() => {
    loadAnalytics();
    prefetchNextPage();
});

Server-Side Optimizations

Route::middleware('cache.headers:public;max_age=3600;etag')
    ->get('/api/posts', [PostController::class, 'index']);

opcache.enable=1
opcache.memory_consumption=256
opcache.jit=1255
opcache.jit_buffer_size=100M

Use Lighthouse and PageSpeed Insights to measure. Aim for a Lighthouse score above 90.