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

Achieving high performance


One of the ways to improve application performance is to run code concurrently. This not only allows us to run code faster and get the results more quickly, but it also frees the main-thread from doing a lot of work and being blocked. You should know that the main thread is responsible for events and user input handling. All the UI work is performed on the main thread and to achieve a really smooth user interaction we should do as little work as possible on the main thread.

Running code concurrently can be a tricky task and sometimes it can lead to increased running time for an operation. Making solid concurrent application architecture is also not a trivial task and you should plan it carefully.

To take full advantage of concurrency, it is very useful to understand the hardware we have at our disposal that allows us to do that.

Device architecture

In order to be able to achieve really high-performance, first we need to learn and understand what kinds of tools we have...