Answer
Large JSON parsing blocks the event loop. Solutions include streaming parsers, chunk processing, or using worker threads.
Quick Answer
JSON.parse() is synchronous and blocks the event loop. For large JSON payloads (multi-MB), this blocking can noticeably delay other requests. Alternatives: stream-json to parse incrementally without blocking, or worker threads to parse in parallel without tying up the main thread. Keep JSON responses small; paginate or filter large data.
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