The Multi-Threaded Asynchronous Parallel World of Swift
summary
Covers concrete patterns and libraries for parallelism: Grand Central Dispatch queues, dispatch groups and semaphores/barriers for atomic access; converts a URLSession download into futures and shows flattening 100 post downloads into a single result using SwiftNIO event loop futures and PromiseKit’s when(fulfilled) flow; demos mapping vs flatMap for chained async author lookups, shows Combine’s dataTaskPublisher into SwiftUI bindings, and concludes that promises avoid callback hell while async/await and actors are the planned future.
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chapters (12)
- 0:00Introduction and speaker intro
- 1:58Why parallelism matters now
- 3:23Concurrency vs parallelism explained
- 4:50Asynchronous programming basics
- 7:00Threading and race conditions
- 9:49Apple’s GCD and dispatch queues
- 13:18Promises and futures overview
- 15:22Demo with SwiftNIO futures
- 22:32Promise Kit demo and comparison
- 27:29Combine and reactive programming
- 31:07Future of Swift concurrency
- 33:31Best practices and closing
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