Dispatch Global

Info

Serial queue But background thread. Only Main is the main thread which is kept for UI and DispatchQueue.main

Quality Of Service parameter. 5 different Quality of Service options

userInteractive: Used for animations, or updating UI.
userInitiated: Used for tasks like loading data from API, preventing the user from making interactions.
default : The default quality-of-service class.
utility: Used for tasks that do not need to be tracked by the user.
background: Used for tasks like saving data in the local database or any maintenance code which is not on high priority.
unspecified: The absence of a quality-of-service class.

DispatchQueue.global().async {
	doSomething()
}

.subscribe(on: DispatchQueue.global())

.receive(on: DispatchQueue.global())