Answer
Async rendering prevents UI blocking during heavy updates, improving responsiveness and reducing jank.
Quick Answer
Modern apps need to handle slow networks, large data, and complex UIs without freezing. Synchronous rendering blocks the main thread — if rendering takes 200ms, the browser can't respond to user input. Async rendering (concurrent mode) lets React yield to the browser between chunks of work, keeping the app responsive.
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