Jan 15, 2018

Dispatch Queues

What? A queue that runs tasks FIFO.

Types? 

  • Serial - one at a time
    • system-provided: main queue
    • you can create your own
  • Concurrent - 1+ tasks at a time
    • system-provided: 4 queues (high, default, low, and background)
    • you can create your own, but 4 system ones should be good enough
Note: iOS 8+ should use QoS instead.