FrontendHaltReact·Advanced·Conceptual·1 min read
What does the React DevTools Profiler's flame graph show?
Short interview answer
It shows how long each component took to render during a recorded commit and which components rendered at all, letting you find the specific component responsible for a slow interaction instead of guessing.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.