Fastest way to list all the annotated methods in annotated classes

DISCLAIMER: "Fastest" here refers to execution time.

I'm trying to list all the methods annotated by M if they are within classes annotated by C.

I know I can get a list of classes using Reflections.getTypesAnnotatedWith and then iterate over the classes asking each method if it is annotated by M. But I wonder if this is the fastest way to do so!