First he said that "I" operating Motorola moto x 2nd generation equipment.
usually flawless so far, until actualize my computer to version 5.1 of Android.
the first weeks all right until he started to show some "lag" (so to speak), small slowdowns do not affect in the least the functioning of the device, and that are fixed by locking and unlocking the computer.
For me, as a user of Motorola, I find myself affected in this way.
Please if you're using the same brand or another, and the same thing has happened to you, do know and explain your problem. Many thanks!