另一方面，当需要IIS环境更多信息(即服务器变量)时，工作进程使用同步管道。
On the other hand, the worker process exploits synchronous pipes when it needs to query for information about the IIS environment (that is, server variables).
这种情况下工作进程使用同步管道，因为需要保持请求处理逻辑顺序。
In this case, the worker process USES synchronous pipes because this would preserve the sequence of the request-processing logic.
只要有可能，你应该使用管道而不是共享内存，并节省昂贵的同步！
Wherever it is possible you should use pipes instead of Shared memory and save the expensive synchronization!
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