Migrating Your App to Swift Packages

Dmitri Fuerle from OkCupid reveals how their team cut clean build times to under a minute by modularizing their iOS codebase. The secret? Swift Package Manager in a monorepo setup.

As iOS apps grow, they become harder to maintain and slower to compile. OkCupid's engineering team tackled this by breaking their monolithic app into Swift Package modules. This tutorial walks through the practical steps of setting up your first local Swift Package within your existing project.

Key Takeaways

• Clean builds compile 20+ modules in under 60 seconds
• Incremental single module changes compile in just 10 seconds
• Uses monorepo approach keeping packages in project Git repository
• Organizes code with Public/Internal folders for better access control
• Enables independent module testing without full app compilation

Part 2 of this series covers how to handle communication between modules as your package adoption scales across the team.