Recently I notice that is easy to speed up the system making two easy changes:
1. With
SystemApp Remover uninstall Google Services and disable Google Play Store + DownloadProvider (later you can enable it again with SystemApp Remover).
2. Also, you speed up the system a lot if you buy a hi-speed SD (eg: Sony Class 10 UHS-1/U3 SDXC up to 94MB/s).
Best.