What is Task in swift
Asked on 2025-10-11
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In Swift, a "Task" is the fundamental unit of concurrency. It represents an independent concurrent execution context. Tasks are lightweight, allowing you to create many of them, and they can execute concurrently. This makes them particularly useful for handling operations that can run independently, such as network requests or processing data in the background.
Tasks can be created to perform specific operations from start to finish and are often initiated in response to events, like a button press. They execute independently of other code, and you can wait for a task to complete to get its result or cancel it if its work becomes unnecessary. Tasks can perform asynchronous operations, and while waiting for these operations to complete, they suspend to yield the CPU to other tasks.
For more detailed information, you can refer to the session Embracing Swift concurrency (07:15) from WWDC 2025, which discusses how tasks are used in Swift concurrency.
Embracing Swift concurrency
Join us to learn the core Swift concurrency concepts. Concurrency helps you improve app responsiveness and performance, and Swift is designed to make asynchronous and concurrent code easier to write correctly. We’ll cover the steps you need to take an app through from single-threaded to concurrent. We’ll also help you determine how and when to make the best use of Swift concurrency features – whether it’s making your code more asynchronous, moving it to the background, or sharing data across concurrent tasks.
What’s new in Swift
Join us for an update on Swift. We’ll talk about workflow improvements that make you more productive, and new and modernized library APIs for fundamental programming tasks. We’ll show examples of Swift adoption throughout more layers of the software stack. Finally, we’ll explore new language features for both improving approachability of concurrency, and achieving peak performance when you need it.
A Swift Tour: Explore Swift’s features and design
Learn the essential features and design philosophy of the Swift programming language. We’ll explore how to model data, handle errors, use protocols, write concurrent code, and more while building up a Swift package that has a library, an HTTP server, and a command line client. Whether you’re just beginning your Swift journey or have been with us from the start, this talk will help you get the most out of the language.