Answer
Render may run multiple times. Heavy logic causes jank, blocks concurrency, and slows transitions.
Quick Answer
Heavy logic in render runs on every re-render — even if the data hasn't changed. Render should be a pure, cheap function that maps state to UI. Move heavy computations to useMemo (memoize results), useEffect (run after render), or outside the component entirely. Render is called frequently — keep it fast.
S
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