The document discusses the differences in performance between Objective-C and Swift. Objective-C is slower than Swift because it is dynamically typed and relies on the objc_msgSend function at runtime to determine method implementations, which has higher overhead than Swift's static compilation to native code. Swift avoids the overhead of objc_msgSend by compiling the code directly to native functions, making method calls as fast as in other compiled languages like C++.
The document describes a TimelineTableViewController class that is responsible for displaying a timeline. It initializes a TimelinePresenter when loaded, which handles fetching the timeline data and notifying the view controller. The presenter calls a TimelineUseCase to retrieve the timeline and then uses the view controller as an output to update the UI, such as showing/hiding empty and ad views depending on the timeline contents.
The document discusses the differences in performance between Objective-C and Swift. Objective-C is slower than Swift because it is dynamically typed and relies on the objc_msgSend function at runtime to determine method implementations, which has higher overhead than Swift's static compilation to native code. Swift avoids the overhead of objc_msgSend by compiling the code directly to native functions, making method calls as fast as in other compiled languages like C++.
The document describes a TimelineTableViewController class that is responsible for displaying a timeline. It initializes a TimelinePresenter when loaded, which handles fetching the timeline data and notifying the view controller. The presenter calls a TimelineUseCase to retrieve the timeline and then uses the view controller as an output to update the UI, such as showing/hiding empty and ad views depending on the timeline contents.