What is whole module optimization?
Swift version: 5.2
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.
SPONSORED Ever ask for help and your reviewer immediately notices issues you missed? Fernando Olivares is a 10-year veteran from Big Nerd Ranch and Lambda School who can help hone your app building skills, and he's just launched a new book that does just that – use the code "hacking" to save $5!
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 7.0
Similar solutions…
- How to check whether a module is available using canImport()
- How to disable the overlay color for images inside Button and NavigationLink
- How to throw errors using strings
- How to set the tint color of a UIView
- Enabling and disabling elements in forms
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
