I' ve just found Windows Communication Foundation performance comparison.
It is available here: A Performance Comparison of Windows Communication Foundation (WCF) with Existing Distributed Communication Technologies
The article compares the WCF to Web Service (asmx), WSE 2.0/3.0, Enterprise Services and .NET Remoting. I am very interested in the comaprison of the WCF to the remoting as it is something I extenisevely use. I will peroform my own comparison with one of my existing servises to check if the conclusion described in the article is correct.
Here is the conclusion taken from there:
To summarize the results, WCF is 25%—50% faster than ASP.NET Web Services, and approximately 25% faster than .NET Remoting. Comparison with .NET Enterprise Service is load dependant, as in one case WCF is nearly 100% faster but in another scenario it is nearly 25% slower. For WSE 2.0/3.0 implementations, migrating them to WCF will obviously provide the most significant performance gains of almost 4x.
If the conclusion is correct I will have one more reason to migrate into WCF. Just wait for my comparison results. I'll try to publish it soon.