Web Development1 min read
Frontend Performance Playbook 2025
A pragmatic checklist to hit <2s LCP on real devices: images, scripts, network, RSC, and monitoring.
AGAnsh GuptaFrontend Engineer
WEB
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
Frontend engineer with 4+ years building scalable SaaS products, design systems, CRM, analytics and omnichannel platforms.
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