Why it's so slow when a wcf client connects to the service?

Question

I met a performance issue when using the WCF service.

Here\'s the story:

1. I wrote a self-hosted WCF service which is hosted by a console application

Answer 1

We experiences the same, I figured out that it is the client that sleeps up to 14 seconds before actually opening the TCP connection.

A simple call to

binding.UseDefaultWebProxy = false;

solved this.

Answer 2

One way could be to add your own warmup script; a script that calls your service on initial load.

Though, this answer might help you, usually, the first access to the service is slow, but the consecutive accesses would be within a sec or two.

The first slow response is related to the JIT compilation of the service assemblies; which means its normal.

Alternatively, you may want to Profile you app. Also you may would like to checkout this article that I wrote some time back.

Answer 3

This should help: http://msdn.microsoft.com/en-us/library/aa751883.aspx

If you host on IIS, that takes a while to start up no matter what.