Answer
Use Chrome DevTools for performance/memory profiling, inspect async call stacks, evaluate network usage, and detect memory leaks. Tools like Lighthouse and VSCode debugger provide deep insights.
Quick Answer
Profiling large JS apps: Chrome DevTools Performance tab records CPU and memory usage per frame. Lighthouse audits performance metrics (LCP, FCP, CLS). Heap Snapshots identify memory leaks. Network tab shows asset load order and size. console.time/timeEnd measures specific operations. React Profiler shows which components re-render and why. Profile on production-like code, not dev builds.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ