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i am working in a very complex application in which,i need to improve the performance. i have keen interest in Multithreading and have studied docs of GCD and Blocks. Although, i have improved the performance quite a bit. i am searching for few answers :-

  1. We have global queue in iOS -> how to check what other tasks they execute or these are vacant queue made for us to use.
  2. If we make our custom queue
    • what priority it has wrt already existing global concurrent queues.
    • How we can set priority of our custom queue, if we make >2.
  3. If we make custom serial/concurrent queues -> how to set priority statically or dynamically if possible.

Thanks, if anybody has answers...

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