10 Swift features worth learning

Swift has received several important updates that make the language even more convenient for everyday work. Most of these features are already available in current versions and are actively used in new projects. Here are 10 innovations that have the greatest practical impact on everyday development.

• Non-copyable types (ownership model)
  Control over copying values at the compiler level has appeared. This allows you to mark types as ~Copyable, which reduces the number of unnecessary copies of large structures and improves performance in scenarios with big data (for example, image or audio processing).
  
• Typed throws
  Now you can explicitly specify which types of errors a function can throw: throws(MyCustomError). This makes the code much more readable and allows the compiler to better check error handling.
  
• Primary associated types
  In protocols with associatedtype, you can immediately specify the primary type: protocol Container<Element>. This greatly simplifies the use of generics in SwiftUI and networking code.
  
• Macros (additional features)
  After the appearance of #Preview, #Observable and #Model in 2024, in 2025 several more useful macros were added for automatic creation of Codable structures from raw data and for generation of boilerplate code in MVVM.
  
• Improved string processing performance
  Working with strings has been significantly accelerated thanks to the new internal implementation. Split, join, regex search operations have become 2–4 times faster on large texts.
  
• BitwiseCopyable protocol
  Allows you to create types that can be safely copied bit by bit. Useful for low-level optimizations, especially when working with graphics or machine learning.
  
• Enhanced concurrency diagnostics
  The compiler began to issue much more accurate warnings about data races and actor isolation violations. This helps to find and fix errors in multi-threaded code faster.
  
• Observation improvements
  @Observable now works even more efficiently in SwiftUI — fewer unnecessary View refactorings, especially in lists with thousands of elements.
  
• Better support for embedded Swift
  Swift has become even easier to use in microcontrollers and embedded projects. This opens the door for developers who want to write firmware in Swift.
  
• New standard library algorithms
  New functions have appeared in Sequence and Collection, including parallel map, compactMap with conditional execution, and more convenient reduce in combination with async.

Why is it worth mastering these features right now? They are already used in new projects of large teams, and knowing them gives a significant advantage when reading modern code and in interviews. Most of them do not require a complete rewrite of the project — it is enough to gradually introduce them into new modules.