Performance optimization helps your applications run faster and smoother. The key is to measure before you make any changes. Guessing leads to wasted work. Instead, use real data to find the actual bottleneck. Then fix it and measure again to confirm improvement.
This skill covers both frontend and backend performance. For frontend, it focuses on Core Web Vitals like Largest Contentful Paint and Interaction to Next Paint. For backend, it looks at response times and database queries. The goal is to improve user experience by making pages load quickly and interactions feel snappy.
The workflow is simple: measure, identify, fix, verify, and guard. Use synthetic tools like Lighthouse and real user data from web-vitals. Only optimize when measurements prove there is a problem. This avoids adding unnecessary complexity.
Global
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