Performance is great as long as the application's window is visible: all cores at 100%, ventilator fan full blast, while the system remains completely responsive in other apps. I can still browse the web, watch videos, etcetera, but all excess power goes to the background threads which is great.
However, as soon as I completely cover my app's windows, performance drops to something like 30% and I can hear the fan slow down and even turn completely off. The same thing happens if I lock the screen (when I want to leave the computer unattended while the calculation is running).
What can I do to keep the computer from throttling down? I don't want to give the background threads real time priority because I want my computer to remain usable, but I do want to keep the computer as a whole at maximum power. Right now I try to keep a tiny corner of the app visible at all times, but there has to be a better way.
I'm using Grand Central Dispatch for the threads, so I hope there's a simple solution without requiring explicit thread management.
Thanks for any info!
Michel