[Mobile] Creating 2d TileMap : Mesh vs SetPixels

Hi guys,

I'm trying to make a rogue like dungeon crawler for Smart Phones here and I'm a bit confused on which method should I use to create the tilemap. The game will generate a RANDOM map every time player enter the dungeon thus I need to create the tilemap procedurally and it can't be a predefined tilemap.

I'm in the middle of using a Mesh and creating new Texture2d using SetPixels, these are my considerations (please CMIIW) :

1. Mesh : + The vertices is easy to understand and I don't need to create the data grid - This is a 3d method and I'm don't quite understand 3d programming thus I'm afraid that it will gives me problem during the development

2. SetPixels : + A 2d method - From what I read, the performance is very poor. but please keep in mind that I only need to do this during the dungeon loading

Do you guys think the SetPixels performance will be very bad? I'm leaning toward the SetPixels as I want the whole thing to be on 2D. Please give me your input.

Thanks!