Compare concurrency options.
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When do you use threading, multiprocessing, or asyncio?
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concurrency
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threading suits I/O-bound work (the GIL releases during blocking I/O). multiprocessing suits CPU-bound work (separate processes bypass the GIL for true parallelism). asyncio suits high-concurrency I/O on one thread via an event loop with async/await.
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PYProcessPool (CPU) vs ThreadPool (I/O)
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