[Shield Tablet Q&A, Help & Troubleshooting] BLKMN:
For the few who remain using these tablets (and the even fewer who bought a 2015 shield controller like me) I have the final nail in the coffin for performance. Without custom OS. Allowing you to use your very specific (criminally underused) 2015 Shield controller wirelessly. Welcome to the end of your woes (performance not guaranteed, this crap worked for me though). I still haven't checked if battery usage has improved, but it has certainly let me depend on this and use my controller again as opposed to using a CustomOS (previously used AEX 6.7, good performance, but bad video playback and lack of wifi controller support).

Required thingys:

TWRP

This awesome script (JournalingDisabler.zip) (thnx very much skynet28): https://xdaforums.com/t/tools-how-t...urnaling-in-internal-ext4-partitions.1252028/

Developer Options

Snacks? Drinks? This is gonna take some time, don't pass out halfway through lol

Boost 1: DISABLE JOURNALING.

Y'all. This is the good stuff. the nitro. This will make your tablet feel new (again, if everything goes right and I'm not some insane fluke). I only got the idea from an offhand comment from m0nt3s. I thought they were talking about one of the writing apps at first, but once I learned what it was, my brain imploded. Did a quick google search, and found skynet28's solution right away. It's a script designed to disable an ext4 logging service that eats up memory and processing power. I didn't think it would be compatible (but my chaotic neutral mind said why not), but it works:

1. Install TWRP using adb and prayer (that's what it feels like the first time around lol)

2. Download the zip (JournalingDisabler.zip) to your tablet.

3. Use the install button in TWRP, navigate to the zip, and install away.

It should show text saying journaling is disabled if all went well. The gains should be immediately noticeable on your next boot. I didn't notice any issues or side effects, but I also have the benefit of not having important/sensitive data on it, so just to play it safe, back up your data in case issues crop up later.

Boost 2: BACKGROUND PROCESSES

This one will be a touch more noticeable, especially if you multitask on this tablet, but it can definitely stop a lot of the hitching. This one will be in the bottom of the developer options. If you don't have dev options, go into the about tablet section and tap the build number until you become a dev. Setting it to 1 or 2 is decent, but setting it to none will have the biggest impact.

Boost 3: DON'T USE APP OPTIMIZATION

Seriously. Don't know who dropped the ball. But just turn it all off. It's not even a boost, it's just a negative having it on.

Boost 4: SYNCING

If anything is syncing, be it Gmail, your YouTube notifications, or a news feed, turn it off. Any time apps struggle and fight for WIFI, your experience sucks. If you aren't using it as a main (i'm using it in my car as a head unit)

Boost 5: Color Correction

Must have been the same peeps who dropped the ball on app optimization. With the gains you get above, you might not need to, but if you're trying to max it out this will do it.

That's it for me! This is what I've done to get my tablet feeling smooth again. Let me know how it goes?