Next.js Performance Optimization: Lighthouse 100, Core Web Vitals, and Beyond

Performance directly impacts conversion rates and SEO. This guide covers every optimization technique for Next.js applications.

Image Optimization

import Image from 'next/image'

// Use Next.js Image component for automatic optimization
<Image
  src="/hero.jpg"
  alt="Hero"
  width={1200}
  height={600}
  priority  // loads above-the-fold images immediately
  placeholder="blur"
  blurDataURL={blurHash}
/>

Font Optimization

import { Inter, Playfair_Display } from 'next/font/google'

const inter = Inter({ subsets: ['latin'], display: 'swap' })
const playfair = Playfair_Display({ subsets: ['latin'], display: 'swap' })

// Fonts are self-hosted and loaded with font-display: swap

Code Splitting and Lazy Loading

import dynamic from 'next/dynamic'

const HeavyChart = dynamic(() => import('./HeavyChart'), {
  loading: () => <ChartSkeleton />,
  ssr: false,
})

Caching Strategies

Use Next.js caching headers, ISR for static pages, and edge caching for API routes.

The Bottom Line

The Web Performance Dashboard from BreafIO provides Core Web Vitals monitoring. The Admin Dashboard Pro implements performance best practices. The SaaS Starter Kit includes optimized components. The Analytics Dashboard tracks performance metrics, and the Landing Page Bundle is built for speed.