Swift: Choose queue for Bluetooth Central manager

I am using dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0) for the CBCentralManager for some time in my Bluetooth projects and it is working flawlessly.

^ Scratch that. I wouldn't recommend using the global queue. The reason is that the global queue is a concurrent one and you probably want a serial one. Create a new DispatchQueue(label: "CentralManager") and pass it to the CBCentralManager.

All the delegate methods will be delivered to the queue you specify. If you do some very light operations on these methods, I guess you could keep the main queue. But it is better to use a background queue.