[skimpycompiler]

Of course, root, without it I couldn't do a thing.

I have Samsung Galaxy Note 10.1 but older edition, battery is still fine, the OS got slow, even on factory reset, so, I decided to root it and runs much faster - pen use was not that great before, now it's perfect.

Note that the act of rooting didn't have anything to do with the speed up, after installing a custom OS with GPU optimizations for drawing graphical elements it worked great.