What is the difference between a synchronous and an asynchronous dispatch queue?

What is the difference between a synchronous and an asynchronous dispatch queue?

A synchronous dispatch queue is a queue that executes tasks in a serial manner, meaning that each task must complete before the next one can start. This type of queue ensures that tasks are executed in a specific order and guarantees that the next task won't start until the previous one finishes.

On the other hand, an asynchronous dispatch queue allows tasks to be executed concurrently, meaning that multiple tasks can run simultaneously. This type of queue doesn't wait for a task to complete before moving on to the next one, allowing for better performance and responsiveness in certain scenarios.

In summary, the main difference between a synchronous and an asynchronous dispatch queue is the order and concurrency in which tasks are executed.