Web Development

Frontend Performance Playbook 2025

A pragmatic checklist to hit <2s LCP on real devices: images, scripts, network, RSC, and monitoring.

Ansh Gupta1 min read
Fig. 18Web Development

Frontend Performance Playbook 2025

Practical tactics that move the needle on real devices.

Images

  • Use modern formats (AVIF/WebP)
  • Explicit width/height to avoid CLS
  • Lazy-load below the fold

JavaScript

  • Remove unused packages, split by route
  • Ship less JS to the client; prefer RSC

Network

  • HTTP/3 + preconnect critical origins
  • Cache aggressively at the edge

Monitoring

  • Field data > lab data; use RUM and synthetic together

Small wins stack up. Measure, then optimize.

  • #Performance
  • #Frontend
  • #Core Web Vitals
  • #Next.js
  • #Optimization
AG

About Ansh

Full Stack Developer and AI Engineer with 4+ years building scalable SaaS products, design systems, CRM, analytics and omnichannel platforms.

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