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Why does the worker pool pattern improve Node.js application performance for CPU-intensive tasks?

hard📝 Conceptual Q10 of 15
Node.js - Worker Threads
Why does the worker pool pattern improve Node.js application performance for CPU-intensive tasks?
ABecause it offloads CPU-heavy work to multiple threads, preventing main thread blocking
BBecause it caches CPU results in memory for faster reuse
CBecause it converts CPU tasks into asynchronous I/O operations
DBecause it disables garbage collection during CPU tasks
Step-by-Step Solution
Solution:

  1. Step 1: Understand Node.js main thread limitations

    CPU-intensive tasks block the single main thread, slowing the app.

  2. Step 2: Role of worker pool pattern

    Worker pool runs CPU tasks in parallel threads, keeping main thread free.

  3. Final Answer:

    Because it offloads CPU-heavy work to multiple threads, preventing main thread blocking -> Option A

  4. Quick Check:

    Worker pool improves CPU task performance by parallel offloading [OK]
Quick Trick: Worker pool runs CPU tasks in parallel threads [OK]
Common Mistakes:
  • Thinking worker pool caches results automatically
  • Confusing CPU tasks with async I/O
  • Believing garbage collection is disabled

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