Performance Engineering Overview This skill covers measuring, optimizing, and maintaining web application performance across the full stack. It addresses Core Web Vitals (LCP, INP, CLS), bundle analysis and code splitting, image optimization, browser and server-side caching, CDN configuration, database query performance, and load testing with k6 and Artillery. Use this skill when Core Web Vitals scores are below targets, bundle sizes are growing, page load times are degrading, or when preparing for traffic spikes. Performance work should be measurement-driven: profile first, optimize second,…