Book Image

Swift High Performance

By : Kostiantyn Koval
Book Image

Swift High Performance

By: Kostiantyn Koval

Overview of this book

Swift is one of the most popular and powerful programming languages for building iOS and Mac OS applications, and continues to evolve with new features and capabilities. Swift is considered a replacement to Objective-C and has performance advantages over Objective-C and Python. Swift adopts safe programming patterns and adds modern features to make programming easier, more flexible, and more fun. Develop Swift and discover best practices that allow you to build solid applications and optimize their performance. First, a few of performance characteristics of Swift will be explained. You will implement new tools available in Swift, including Playgrounds and REPL. These will improve your code efficiency, enable you to analyse Swift code, and enhance performance. Next, the importance of building solid applications using multithreading concurrency and multi-core device architecture is covered, before moving on to best practices and techniques that you should utilize when building high performance applications, such as concurrency and lazy-loading. Finally, you will explore the underlying structure of Swift further, and learn how to disassemble and compile Swift code.
Table of Contents (15 chapters)
Swift High Performance
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Summary


In the first part of this chapter, we covered multithreading concurrency and multi-core device architecture. This general information allows us to understand the core principles of concurrent code execution.

In the second part, we covered three ways to run code asynchronously in Swift, by using threads, GCD, and NSOperation. We have explored the differences between them and the situations for which each is most suitable.

In the third part of the chapter, we concentrated on architecting asynchronous Swift code by using GCD. We have covered important tips such as passing a callback function parameter, avoiding a state, using immutable values, and others. Also, we have covered two Swift attributes—@noescape and @autoclosure—that are very useful.

In the next chapter, we will cover one more important performance optimization technique: Lazy Loading.