Wednesday, 18 February 2009

Do ASMX or WCF Proxy clients use IO completion ports?

I'm in the middle of performance testing a critical section of my project, when I notice a whole lot of extra threads being used to to perform WaitOrTimerCallback operations. 


On closer inspection I can see that these are being spawned by my ASMX client proxy class for operations on a remote server.

I was under the impression that these were using IO completion ports like all of my other asynchronous IO Calls.

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