Threaded programs also run into a few problems that are not normally seen with multiple processes and IPC.

线程程序有时会出现在多进程和 IPC 程序设计中不常出现的一些问题。

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Dequeuing is single threaded, even if the message flow itself is configured for multiple instances.

退出队列是一个单线程操作，即使消息流本身配置为多实例时也是如此。

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A newer, threaded, model is called worker, which USES multiple processes, each with multiple threads to get better performance with lower overhead.

较新的线程化模型称为worker，它使用多个进程，每个进程又有多个线程，这样就能以较低的开销获得更好的性能。

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