6200PRM is max for the Macbook Air. But it's normal for a Macbook Air as the thing gets hot overtime.
The problem you are facing is called a 'Kernal panic'. Monitor you CPU performance when the slowdown occurs, you CPUs will be in Full Throttle (Do this by using ACTIVITY MONITOR.. Just type it in finder). This panic mainly occurs since your Macbook Air's temperature has reached Critical point (mine does this whenever the temperature exceeds 90 Degree).
A quick solution to this is to just put the thing to SLEEP and wake it 5 seconds later and everything will return to normal. However, I would advice keeping the Back end of the Air raised by a Laptop stand as the panic is due to heat not ventilating out cause you keep it on a soft surface and the vents get covered by it as the Air's weight pushes it down in the soft surface.
I used to have a lot of problems, but recently, I started following the above steps and the thing hasn't stalled for a long time.
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Jun 18, 2020 The bundle id for this application is com.crystalidea.MacsFanControl. The latest installer that can be downloaded is 10 MB in size. The default filename for the program's installer is macsfancontrol.zip. This free Mac app is a product of CrystalIdea Software Inc.
When you open your Mac’s Photos App, the default library it opens is the System Library. To check if you have multiple libraries, close the Photos App and then relaunch holding down the Option Key–see if there are additional photo libraries on your Mac. If so, open each one by one (you’ll need to close and relaunch with the Option key to check each library) and see if your photos are contained in one of those additional libraries.If you locate the correct library, you can designate it as your system library. However, you are only able to open a single photo library at any one time.