What happens to the cube performance when you have too many UDAs?

Hi,
what's the impact on the cube performance if you have too many UDAs associated with the same level of members? Let's say 15 UDAs for each member
If attribute is not an option, what's another way to help alleviate the data load?

Hi,
Adding UDAs to the outline doesn't impact the size of Essbase database.
I've seen cubes with over 70 UDAs. And I think UDAs is the best choice to set load rules.
But for considering of the implication of Dynamic calculations as reporting on UDAs can be slow. Define UDAs on sparse dimensions only.

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