Swift (iOS/macOS) Application Performance

The book "Swift (iOS/macOS) Application Performance" is a practical guide to creating fast and responsive applications for the Apple ecosystem. The author, Andrey Vetrov, shares proven techniques and insights that will help you take your projects to a new level of efficiency.

What is this book about?

The book covers all key aspects of Swift code performance. You will learn:

• How to properly use profiling tools (Xcode Instruments, Time Profiler, Allocations) to identify bottlenecks.
• Memory management principles: ARC, leaks, weak/unowned references and their impact on speed.
• Optimizing work with collections, strings, and closures.
• Asynchronous programming: GCD, OperationQueue, Swift Concurrency (async/await) and their impact on UI responsiveness.
• Optimization specifics for different devices: iPhone, iPad, Mac.
• Working with caching, lazy loading, and minimizing power consumption.

Who is this book for?

The book will be useful for:

• Junior and Middle developers who want to understand why their application is lagging and how to fix it.
• Senior engineers striving for a deep understanding of the internal workings of Swift Runtime and LLVM.
• Team Leads and architects responsible for the overall performance of the product.
• Game and graphics application developers where every frame counts.

What will you learn after reading?

• Learn to read and analyze Instruments reports, find "heavy" code sections.
• Be able to reduce application launch time and response time to user actions.
• Learn how to avoid common mistakes that lead to freezes and crashes.
• Master methods for profiling graphics (Metal, Core Animation) and network operations.
• Get ready-made recipes for optimizing UITableView, UICollectionView, and SwiftUI.

This book is not dry theory, but a collection of real-world cases and code examples that can be immediately applied in your projects. Whether you are creating a social network, a banking application, or a game, the knowledge from this book will help make your product faster and more stable. Perfect for self-study and as a desktop reference for every iOS/macOS developer.