performance depens on device, but good enough for small games it seems =)
there's prolly still lots of room left to optimize, but that's not a priority right now, still a lot of the api is missing.
resolution : by default it rescales/squashes the default or requested resolution into the phone screen,
this is to be able to test unmodified .love files that are not aware of phone stuff.
if you're making a game that is aware of phone stuff,
you can add t.android_native_screen = true to conf.lua to disable this rescaling,
and use love.graphics.getWidth() and getHeight() to get the current resolution, which currently changes depending depending on how you hold the device.
( i'm trying to figure out how to disable this nice but annoying feature atm
we could also add a orientation-change notification-callback to the love.phone.* custom api if there's interest for that.