As placeholders I was using Tiled Backgrounds to design the "floors" of my top-down shooter. I have recently re-designed my "floors" using a tilemap object (400px by 320px sliced into 16x16) with no Behaviours. This first tilemap covers the ENTIRE layout as it is functioning as a replacement for the tiled backgrounds. I also have a second tilemap of the same resolution and slice (16x16) on top of the other tilemap, used for detailing (placing items in rooms, for example).
Now whenever I load my game on Android I've lost about 20FPS. I've tried various troubleshooting guides / best practices with Tilemaps from the forums / help pages, but to no avail.
My only option seems to be re-creating 5-10 backgrounds, and having many individual sprites, to cover having some basic detail to my levels. Surely it isn't meant to be this way?