A Performance Comparison of Windows Communication Foundation

Windows Communication Foundation (WCF) is a distributed communication technology that ships as part of the .NET Framework 3.0. The following article concentrates on comparing the performance of WCF with existing .NET distributed communication technologies.

A Performance Comparison of Windows Communication Foundation (WCF) with Existing Distributed Communication Technologies

Here is the conclusion taken from the above article:
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.

WCF vs Remoting

The following blog does the comparison between WCF and Remoting.

WCF vs. Remoting (with DataSet)- performance comparison

Here is the conclusion taken from the above article:
Sending DataSet with .NET Remoting is faster than sending it with WCF. Maybe there is some other way to improve the WCF in case of sending DatSet but I haven't found it yet. I'll post the test project somewhere (maybe on codeproject) so it could be examined.

He further refined his test in the following blog

WCF vs Remoting - adjustments to my results

Here is the conclusion taken from above article:

The WCF and .NET Remoting are really comparable in performance. The differences are so small (measuring client latency) that it does not matter which one is a bit faster. WCF though has much better server throughput than .NET Remoting and WCF does much more than.