A solid reference for tracking down performance issues across your stack. It covers the essentials: Core Web Vitals with Lighthouse, React DevTools profiling, bundle analysis for bloat, and Node.js CPU and memory debugging with tools like Clinic.js. The React optimization patterns are standard but well organized, from memoization to virtualization with react-window. The database section handles EXPLAIN ANALYZE and N+1 query fixes. What makes this useful is the quick wins checklist at the end. When your app is slow and you need to methodically work through possible causes, this gives you a decent roadmap without overthinking it.
npx skills add https://github.com/onewave-ai/claude-skills --skill performance-profiler