MainOrNot – Learn Swift 6 Concurrency with realtime thread visualization

Summary: MainOrNot visualizes Swift 6.2 concurrency by showing real-time thread execution with main and background thread indicators. It offers 13 interactive examples covering async/await, actors, and new Swift 6.2 concurrency flags, enabling users to execute code live and observe thread behavior instantly.

What it does

MainOrNot displays thread execution in real-time using green and red indicators for main and background threads. It includes executable examples demonstrating Swift 6.2 concurrency concepts, including Approachable Concurrency and Default Actor Isolation.

Who it's for

It is designed for Swift developers learning concurrency and debugging async code behavior.

Why it matters

It solves the challenge of understanding and debugging asynchronous Swift code by making thread usage visible during execution.