Tag

Questions tagged “GCD”

Start from this tag, then add more in the filter bar to narrow further. The URL keeps your choices so you can bookmark or share the same view.

What concurrency problems should you know in Swift?

Distinguish race conditions, data races, priority inversion, deadlock, and actor reentrancy anomalies with short Swift examples and practical fixes

Concurrency Thread Safety Actors GCD

Concurrency

Intermediate Concurrency

What's the difference between GCD and OperationQueue?

GCD is Apple's low-level API for scheduling work on dispatch queues. OperationQueue is a higher-level Foundation API that represents work as Operation objects with dependencies, cancellation, priorities, and concurrency limits.

Concurrency GCD

Concurrency

Intermediate Concurrency

What's the difference between DispatchQueue.main.async and .sync?

.async schedules work and returns immediately, while .sync blocks the caller until the work finishes. On the main queue, .async is the normal way to perform UI work, whereas calling .sync from the main thread causes a deadlock.

Concurrency GCD

Concurrency