Web Performance Optimization

This is your comprehensive toolkit for fixing slow web apps. It covers the standard performance playbook: code splitting and lazy loading for React, image optimization, HTTP caching with service workers, compression, and monitoring setup. The skill gives you working examples for each area, from lazy route loading to Core Web Vitals tracking. It's most useful when you're staring at red Lighthouse scores or poor LCP/CLS metrics and need proven patterns to methodically improve them. The reference guides break down each optimization strategy into implementable chunks, so you're not piecing together blog posts at 2am trying to figure out why your bundle is still 3MB.