app.hyper-limit.bookmark

{
  "url": "https://www.massicotte.org/concurrency-glossary",
  "$type": "app.hyper-limit.bookmark",
  "title": "A Swift Concurrency Glossary",
  "pinned": false,
  "summary": "The article \"A Swift Concurrency Glossary\" serves as a comprehensive reference for terms, keywords, and annotations related to Swift's concurrency model. The author emphasizes that while understanding all the concepts is beneficial, it is not a prerequisite for effectively using Swift Concurrency.\n\nKey points from the article include:\n\n1. **Actors**: \n   - Defined as a new reference type that protects mutable state, introduced in SE-0306. Actors are crucial for establishing units of isolation within concurrent programming.\n\n2. **Async and Await**: \n   - The `async` keyword allows functions to utilize `await`, marking them as capable of executing asynchronously. The `await` keyword introduces suspension points during execution, facilitating control over asynchronous tasks.\n\n3. **AsyncSequence**: \n   - A protocol introduced in SE-0298 that represents a series of values produced over time, with values available at some future point.\n\n4. **Flow Control Constructs**: \n   - The `async let` construct enables asynchronous work to start without immediate awaiting, while the `for-await` construct allows retrieval of values from an AsyncSequence, resembling traditional loops.\n\n5. **Annotations and Keywords**: \n   - Various annotations, such as `@concurrent`, `@globalActor`, and `@MainActor`, provide mechanisms for controlling task execution and actor isolation. The `nonisolated` keyword allows for the explicit disabling of actor isolation.\n\n6. **Executor and Isolation Concepts**: \n   - The article discusses the concept of executors that run concurrent code and the importance of isolation in ensuring thread safety. Isolation provides a framework for managing how actors handle concurrent access to mutable state.\n\n7. **Continuations and Interfacing**: \n   - Continuations help integrate callback-based code with the `await` syntax, facilitating smoother transitions between synchronous and asynchronous code.\n\n8. **Default Isolation and Region-Based Isolation**: \n   - The article covers the ability to control default isolation and the introduction of region-based isolation, which allows the compiler to relax Sendable checks under specific circumstances.\n\n9. **Backward Compatibility**: \n   - The article touches on attributes like `@preconcurrency`, essential for maintaining compatibility with code written before Swift 6, ensuring a smoother transition to the new concurrency model.\n\nIn conclusion, the glossary provides a structured overview of essential terms and concepts in Swift Concurrency, equipping developers with the knowledge needed to navigate this complex area of programming effectively. The author also encourages readers to share any missing terms, highlighting the collaborative nature of building a comprehensive resource.",
  "archived": false,
  "imageUrl": "https://www.google.com/s2/favicons?domain=www.massicotte.org&sz=256",
  "createdAt": "2025-09-20T19:50:28.005Z",
  "encrypted": false,
  "updatedAt": "2025-09-20T19:50:54.351Z",
  "description": "It would be nice if there was a single place to go to look up all the terms, keywords, and annotations related to Swift concurrency. So here it is. If you notice something I’ve missed, pleased o let m..."
}

did:plc:5j2yklrr4pozy7yhrdq5xfn7 | at://did:plc:5j2yklrr4pozy7yhrdq5xfn7/app.hyper-limit.bookmark/3lzc5myqkao2l