Answer
Worker threads run CPU-intensive tasks in parallel without blocking the main thread. They are ideal for cryptography, parsing, and other heavy computations.
Quick Answer
Worker threads run JavaScript in a separate V8 instance with its own event loop — in a real OS thread. Unlike cluster (separate processes), workers share memory (SharedArrayBuffer). Use them for CPU-heavy tasks (image processing, compression, heavy computation) that would block the event loop and hurt response times for all other requests.
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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