uv map and color map - frustrated

Hello
I have been doing blender game engine project for a while.
What I was understood so far is, to see the texture when game engine started, I need to use UV map to apply the color or texture to my model. But someone told me it is a way old method I just need to use color map(or texture map). I looked through game engine forum I can’t find the information about color map. Can anyone tell me where I can find color map tutorial?

You are just being confused by words that mean almost the same thing. There are many methods to map the color of an image to a mesh, ALL of which are called image texturing, and they all map the color of image to the mesh faces. In the MapInput panel, you choose the coordinates to use in mapping the image. If you click UV, you are doing UV Texturing and are using a separate UV map to apply the image to the mesh. If you click Orco, you are using the coordinates of the mesh to map the image to the mesh. In EITHER METHOD, you click “Col” in the MapTo, which means that you are using the colors of the image to map colors to the mesh.

I was told UV map makes game engine slower than color map. Is it true?
Do you advise me to use color map rather than UV map?