The answer
Core Web Vitals (LCP, FID, CLS), bundle size, code splitting, tree shaking, caching (HTTP, service worker, CDN), image optimization, lazy loading, prefetch, preload, and the critical rendering path.
Frontend Interview Topics to Study
What performance topics are asked in frontend interviews?
More FAQs in Frontend Interview Topics to Study
Execution context, hoisting, closures, the event loop, this keyword, call/apply/bind, promises, async/await, Promise combinators, prototypes, prototypal inheritance, array methods, debounce, throttle, currying, event bubbling, CORS, and polyfills.
Hooks (useState, useEffect, useMemo, useCallback, useRef, useContext, useReducer), reconciliation, virtual DOM, keys, state management (Context, Redux, Zustand), performance (memo, lazy loading, code splitting), custom hooks, error boundaries, and React 18 features.
Rendering strategies (CSR, SSR, SSG, ISR), state management at scale, API design (REST, GraphQL, polling, WebSockets), performance (Core Web Vitals, caching, CDN), accessibility, component design, and microfrontends.
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