Wcf service methods first calling takes too long time

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In my wpf project I use wcf service for getting service methods from the server. I'm using caliburn framework and the IoC container that is structure map.
In the first time that the client side calls one of services from the server it takes too long time (about 40 seconds) but the query execution time is just 2 seconds. after this first calling, the other request and the rest of service method calling execute as rapid as I expect.
I dont know the reason and will appreciate if any body can help me to resolve this problem.

Posted 14-Jun-10 8:04am

atiehr

Updated 14-Jun-10 9:16am

Dimitri Witkowski

v2

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**PSK_** · Answer 1 · 2010-06-14T16:12:00

If it's the first call it will take a while as it's a cold startup for WCF, the entire WCF framework gets loaded and initial handshake and setting up the channels is costly. This have been improved in 3.5 SP1, makes sure that SP1 is installed on the machine.

You can have a look to this http://msdn.microsoft.com/en-us/library/aa751883.aspx[^]