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Escaping the Event Loop with Node worker_threads

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Escaping the Event Loop with Node worker_threads

EDITOR BRIEF

The article explains that Node’s event loop works well when callbacks are short and the app is mostly waiting on I/O. But when a request triggers slow, CPU-heavy work like a recursive Fibonacci calculation, the single JavaScript thread blocks and freezes the whole server. It says this is why actual parallelism is needed, using worker_threads.

INSIGHTS

For learners, this shows the limit of async code: it helps with waiting, not heavy computation. A good next step is to test a slow function in a simple Node server, then move that work into a worker thread and compare responsiveness.

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