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Core Web Vitals (LCP, INP, CLS), loading strategies (code splitting, tree shaking, resource hints, image optimization), runtime performance (layout thrashing, compositor animations, web workers, virtualization), and a structured debugging framework.
Goal: Build a complete, interview-ready performance mental model: Core Web Vitals (including INP replacing FID in 2024), loading strategies, runtime optimization, network caching, and a structured "how to debug a slow page" answer.
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