I've been using Android TV since the Nexus Player first came out and I have some tips to speed up your device that worked for me. These are obvious to advanced users but newbies will find these useful.
- Remove the Google TV launcher and replace it with FLauncher by using the instructions in the link below. (Advanced)
https://gitlab.com/etienn01/flauncher#set-flauncher-as-default-launcher
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Disable the Google app if you don't use it. Go to Settings > Apps > Google app and Disable it so it never runs in the background. (Easy)
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If syncing Google info isn't important to you, disable syncing of all your information to your Android TV device so it never syncs in the background. Go to Settings > Accounts > Your account > disable all the sync activities like Calendar, People details, Contacts, etc. (Easy)
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Experiment with using open-source apps instead of using proprietary apps that use a lot of resources. Use S0undTV instead of the official Twitch app. You can also try alternatives to popular open source apps like Kodi. I prefer using /r/NovaVideoPlayer/ over Kodi, for example, because it is Android native.
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Don't let your device storage get close to full. Stop using apps that constantly download data. If you have a big Kodi library with tons of metadata, you may have to just use Kodi without downloading metadata.
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Keep your device away from hot devices like the back of your TV or other devices that emit heat. Put it in a place with good airflow or at least a cool surface. Some people even report putting their device on a small metal surface to use as a heatsink to cool it further.
Got any more tips? Comment below.
Dev settings and change: animation scale for window/ transitional animation scale/ animator duration scale, from 1 to 0.5 or completely off
Sorry if not the complete right words, eng is not my installed language, but first thing i do on all my devices