What is the point of sending timeouts to a different queue and host in nservicebus?

I notice the default config/recommenda开发者_开发问答tion of the timoutmanager is running it in its own host and pointing to its own queue.

Is it simply for performance?

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The timeout manager can manage timeouts for many different nsb endpoint hence the need to run in a separate process. This will also give you fault tolerance for your timeouts