Getting Swift to run fast is less about clever algorithms and more about how you present your code to the compiler. The Swift compiler is hungry for predictable input — patterns it can recognize, tear apart, and rebuild into something lean. I’m Yuki Tanaka, and I’ve spent a career chasing performance at the OS layer.
Swift’s compiler can be a strong partner—if you feed it code that matches its optimization model. Getting to fast, lean machine instructions isn’t a puzzle to outsmart the optimizer. It’s about stripping away ambiguity and leaning into the guarantees the language already gives you. This piece walks through concrete, no-nonsense ways to help the Swift
Swift 5.5 brought a concurrency model that actually feels like it belongs in the language. Async/await lets you reason about work that suspends and resumes without hunting through nested closures. But once you start writing real code, the sunny-day path is rarely the whole story. Things break. Networks hiccup. Payloads surprise you. This guide lays
The Case for Moving Beyond Completion Handlers If you have built or maintained a substantial iOS or macOS codebase over the past few years, you are likely familiar with the growing complexity of asynchronous programming in Swift. Nested closures, retain cycles, forgotten weak self references, and deeply indented completion handlers have been the standard tax
