[Algorithms] indexed face list efficiency

[De B. <be...@ii...>]

Say you either were going to represent an object as a list of verticies or a
vertexlist & facelist. If no verticies are gained by using a facelist is it
less efficient? That is, if the facelist looks like {1, 2, 3, 4, 5, 6, 7, 8,
9..}. (I know results may vary on different architecture, but I am just
talking in general). If so is a good metric to use if sizeof(vertexed saved)
> sizeof(facelist} then use facelist, otherwise just use a vertexlist. 

I am including cases where verticies have multiple texture UV, so it is
possible to have an object with 100% distinct verticies. For example a
tetrahedron with different textures on each side.

-Ryan De Boer