Do protocols come with any overhead? (ie. obvious benefits aside, do they slow things down?)
Do protocols come with any overhead? (ie. obvious benefits aside, do they slow things
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Do protocols come with any overhead? (ie. obvious benefits aside, do they slow things down?)
From a runtime point of view (and as far as I know), protocols have no impact on performance because the cost of sending a message is the same, whether the instance is referenced by its class or by a conforming protocol.
From a programming point of view, protocols offers a lot of flexibility, especially when you are designing low-coupling API. The Protocol chapter in the Objective-C Programming Guide is pretty comprehensive on the features provided. You might take a look at it.