iOS and macOS Performance Tuning: Cocoa, Cocoa Touch, Objective-C, and Swift

Marcel Weiher

Feb 2017 · Addison-Wesley Professional

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This is the eBook of the printed book and may not include any media, website access codes, or print supplements that may come packaged with the bound book.

In iOS and macOSTM Performance Tuning, Marcel Weiher drills down to the code level to help you systematically optimize CPU, memory, I/O, graphics, and program responsiveness in any Objective-C, Cocoa, or CocoaTouch program.

This up-to-date guide focuses entirely on performance optimization for macOS and iOS. Drawing on 25 years of experience optimizing Apple device software, Weiher identifies concrete performance problems that can be discovered empirically via measurement. Then, based on a deep understanding of fundamental principles, he presents specific techniques for solving them.

Weiher presents insights you won’t find anywhere else, most of them applying to both macOS and iOS development. Throughout, he reveals common pitfalls and misconceptions about Apple device performance, explains the realities, and helps you reflect those realities in code that performs beautifully.

• Understand optimization principles, measurement, tools, pitfalls, and techniques
• Recognize when to carefully optimize, and when it isn’t worth your time
• Balance performance and encapsulation to create efficient object representations, communication, data access, and computation
• Avoid mistakes that slow down Objective-C programs and hinder later optimization
• Fix leaks and other problems with memory and resource management
• Address I/O issues associated with drives, networking, serialization, and SQLite
• Code graphics and UIs that don’t overwhelm limited iOS device resources
• Learn what all developers need to know about Swift performance

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Marcel Weiher is a software engineeer and researcher with more than 25 years of experience with Cocoa-related technologies. Marcel’s work has always been performance-focused, ranging from solving impossible pre-press problems on the machines of the day via optimizing one of the world’s busiest web properties at the BBC to helping other Apple engineers improve the performance of their code on Apple’s Mac OS X performance team.

In addition to helping established companies and startups create award-winning software and turn around development teams, Marcel also teaches, blogs, speaks at conferences, contributes to open source, and invents new techniques such as Higher Order Messaging. He also works on programming languages, starting with an Objective-C implementation in 1987 and culminating in the Objective-Smalltalk architecture research language. Marcel currently works as a principal software engineer at Microsoft Berlin and maintains his own software and consulting company, metaobject ltd.