What is the difference between ref and GetAtt?
Can you clarify the distinction between the "ref" and "GetAtt" functionalities in the context of programming and software development? I understand that both are often used in accessing or retrieving attributes or properties of an object, but I'm curious about the specific nuances and use cases that differentiate them. In what scenarios would you recommend using "ref" over "GetAtt," and vice versa? Additionally, are there any performance implications or best practices to consider when making this choice?