Best Way To Have a Good Performance For Background ?

hi,

i want to make a background (map) for my game

my game must have big maps like 2048x2048 and bigger

so what is the best way (best performance) ? :

1 - i draw all things like rocks and... in one background and use that picture as a background (size of picture is same size of the map)

2 - or i use smaller background (like 256x256 and repeat it) and create so much (like 100 objects or more) objects and sprites on that background (like different sprite for rocks and walls and ....)

Thanks

use the tilemap object, and add multiple tilemaps if needs be.