What is more efficient for duplicating tables: referencing tables (PQ) or creating calculated tables

[__Marc__]

Sometimes, for some use cases, you want the same table to be available more than once in the model instead of using (in)active relations with USERELATIONSHIP. Eg. a Order Date and Shipping Date table.

You can do that by referencing a table (using PQ) or by creating calculated tables in DAX.

I wonder what is the most efficient approach regarding speed, size (memory) and refresh times?

[Fowmy · Accepted solution]

@__Marc__ 

Referencing the table in PQ is the best option. This way, when you load the queries to the model, you get a highly optimized model with good compression compared to creating Tables in the Model using dax