What's the difference between adding pseudo-private ivars in a class extension or in the @implementation block?

Question

What\'s the difference between putting pseudo-private instance variables in a class extension inside the .m file, or putting them in the newly introduced @implementation bra

Answer 1

Personally, I prefer to put my ivars in a single class extension in the implementation file, I think it's cleaner that way. I don't think there are any performance advantages or consequences to using one or the other, it's more about being able to code the way you want to.