In what methods does AutoMapper use reflection?

Question

I wonder if AutoMapper uses reflection in its Mapper.Map<>() method, or if the use of reflection is limited to the Mapper.CreateMap<>() method?

Answer 1

Neither, to be honest. When you call CreateMap, AutoMapper uses optimizers to build the code for getting/setting values on source/destination types. Currently, it uses a combination of Reflection.Emit and expression tree compilation. At Map time, it uses the optimized callbacks for interacting with types.