Found a solution for my shield tablet slow down

[tjp888]

Like a lot of people with the Shield Tablet, mine was getting very laggy and slow. It was at it's worse when it had been sitting idle for a while (and when not on a charger). Since the "doze" function in Marshmallow sucks, I suspected that the slow down was a result of the tablet not executing the "doze" function correctly. If you google this you'll find this is a huge problem with Marshmallow.
So I rooted the table and with the adb command of "adb shell dumpsys deviceidle disable" was able to disable doze.
Ta-da! No more issues with an unresponsive tablet since doing this. Of course, I'll have to execute this command after each reboot, but I don't care. It's a huge improvement.

 

[doniago]

I switched to CyanogenMod, which has helped, though it tends to freeze up maybe 2-3 times a week. Might try switching back and giving this a shot, since under CM my wi-fi is having trouble connecting to my work network consistently.