Threads, Queues, and Things to Come: Present and Future of Concurrency in Swift
summary
Shows concrete code using GCD and NSOperationQueue with a real Hacker News client: fetches 500 IDs, spawns parallel story downloads, uses maxConcurrentOperationCount = 4, makes icon fetches depend on story fetches, and serializes async callbacks inside operations with a dispatch group. Shares mutate-safe updates via a serial dispatch queue, suspends the queue when a user opens a story, and demos progressive loading in the simulator. Predicts future native concurrency (ownership, green threads, actors).
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chapters (20)
- 0:00Intro
- 1:51CONCURRENCY?
- 2:26CORES!!!
- 4:10RESPONSIVENESS
- 6:08GRAND CENTRAL DISPATCH
- 7:04DISPATCH QUEUE PROPERTIES
- 8:37EXAMPLE: Serial, Background
- 11:02EXAMPLE: Concurrent, User Initiated
- 12:06OTHER GCD FEATURES
- 12:21DISPATCH GROUPS
- 13:31(NS) OperationQueue
- 14:03OPERATION QUEUE PROPERTIES
- 16:40SAMPLE
- 27:27SWIFT EVOLUTION
- 29:56POSSIBLE NATIVE MODELS
- 30:17GREEN THREADS
- 31:23PROMISES
- 32:58THE ACTOR MODEL
- 35:45ACTORS IN SWIFT?
- 36:57PREDICTIONS & OPINIONS
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