Why Choose Struct Over Class?

Question

Playing around with Swift, coming from a Java background, why would you want to choose a Struct instead of a Class? Seems like they are the same thing, with a Struct offeri

Answer 1

Some advantages:

• automatically threadsafe due to not being shareable
• uses less memory due to no isa and refcount (and in fact is stack allocated generally)
• methods are always statically dispatched, so can be inlined (though @final can do this for classes)
• easier to reason about (no need to "defensively copy" as is typical with NSArray, NSString, etc...) for the same reason as thread safety