First WCF connection made in new AppDomain is very slow

Question

I have a library that I use that uses WCF to call an http service to get settings. Normally the first call takes ~100 milliseconds and subsequent calls takes only a few millisec

Answer 1

I found the following article that talks about how only the first AppDomain can use native image dlls, so a child appdomain will always be forced to JIT lots of stuff that the initial AppDomain doesn't have to. This could lead to the performancce impact I am seeing, but would it be possible to somehow not get this performance penalty?

If there is a native image for the assembly, only the first AppDomain can use the native image. All other AppDomains will have to JIT-compile the code which can result in a significant CPU cost.