I got my N7, 16GB WiFi, 1½ month(s) ago, and it was amazing. I was playing games, like Modern Combat 4, at a super smooth frame rate, I was browsing the web at amazings FPS's, just the general UI was so fluid.
The day I got it, I unlocked, flashed a recovery and rooted. I play the game I mentioned above, MC4, a lot and am quite good at it. I though that it would be a good idea to record what I was doing and show the world! (www.youtube.com/user/StealthGamingAndroid if you want to see)
The game was smooth before, just playing, and was still smooth after. What impressed me was that even while recording, it felt like I still had amazing frames.
About a week or so ago, that stopped. I was getting lag, the game was jittery and making the whole thing unplayable, even when not recording. But it wasn't just the game. The whole UI felt, even though it wasn't terrible, sluggish.
I didn't/haven't changed my setup, regarding ROM, Kernel or Processor Speeds since the day I got it. It is running the version of 4.3 it came with out of the box. (My choosing to keep it on that and not update)
The only things I have done regarding root have been using SCR Pro, the recording software, and using Xposed and Gravitybox.
I do not know what is causing this sudden lag, and how I can fix it. A brief search on Google didn't turn up anything that I could relate to. So I present to you my question.
How do I fix this lag?
I do not mind if it means using root, flashing a new ROM or even a new kernel. (Never flashed a different kernel on all 4 of my devices) Over clocking I also haven't done, but if it means removing the lag, I will consider it.
I am extremely grateful for what ever solutions or suggestions you give me, and will happily look into them.
Thank you for your time reading this, and for helping a confused user out.