It depends! Are you running on a fairly new device or an older one? We tested with a few phones and tablets and didn't note anything running slowly - but obviously the Android ecosystem is fairly vast. Older devices may take a bit more time to load and unload things.
It's kinda old, but not really old. Well the delay itself it's not really that long just like 1-2 second, so far loading and saving game is works just fine and dialog also run smoothly. Maybe it's just my phone, it's not really a big issue in the first place bcz i don't really have a patience to wait lol