NEW! Master Swift design patterns with my latest book! >>

What is whole module optimization?

Paul Hudson       @twostraws

Whole module optimization is a compiler pass that can add significant performance gains, and so it's always worth enabling when doing a release build of your app for the App Store. How it works is quite simple: when Swift builds the final version of your app it combines all your source files together and can evaluate the whole structure of your program at once. This lets it make extra optimizations that would be impossible before, when every file was optimized individually.

Available from iOS 7.0

Did this solution work for you? Please pass it on!

Other people are reading…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

Want to build macOS apps?

Hacking with macOS delivers 18 awesome projects that teach you macOS development in no time – take control of your desktop today!

MASTER SWIFT NOW
Buy Practical iOS 12 Buy Pro Swift Buy Swift Design Patterns Buy Practical iOS 11 Buy Swift Coding Challenges Buy Server-Side Swift (Vapor Edition) Buy Server-Side Swift (Kitura Edition) Buy Hacking with macOS Buy Advanced iOS Volume One Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with Swift Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Beyond Code

Was this page useful? Let me know!

Click here to visit the Hacking with Swift store >>