What is difference between Dispatch Queue Priority and QoS in Dispatch Queue?

Question

is there any difference between DISPATCH_QUEUE_PRIORITY_HIGH and user-interactive for QoS in Dispatch Queue?

score 0 · Accepted Answer · answered Dec 29 '21 at 06:14

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Apple has deprecated Dispatch queue priority from iOS 8.0 instead of that we can use Quality of service.

So Basically QOS and priority does same thing.

answered Dec 29 '21 at 06:14

nuttekar

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score -1 · Answer 2 · edited Jun 20 '20 at 09:12

-1

From Apple documentation:

Items dispatched to the queue run at high priority; the queue is scheduled for execution before any default priority or low priority queue.

This constant maps to the QOS_CLASS_USER_INITIATED class.

So, they are not entirely equivalent.

edited Jun 20 '20 at 09:12

Community

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answered Jul 30 '18 at 09:59

Cristik

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Hi Cristik, when to give priority or QoS to distach queue? – nuttekar Jul 30 '18 at 10:04
@nuttekar the documentation should give you the best answer to this. If you can't find it in the documentation you can ask another question on SO. – Cristik Jul 30 '18 at 10:06
what will happen if i give high priority with background as a QoS? – nuttekar Jul 30 '18 at 10:06

What is difference between Dispatch Queue Priority and QoS in Dispatch Queue?

2 Answers2