Does duplicate or reference hitting my table twice once the report is being refreshed?

[v_mark]

I don't know if this is more a database question or a Power Query question but I am taking chances here.
For visual context I place a simple diagram below.
I am connected to a SQL Server On-prem and getting multiple tables. New Requirement comes in to consolidate those tables which I did by using reference in Power Query now I want to know if I am hitting these tables twice at the backend everytime the report is being refresh. Or in any event I will connect to the table as a Power BI Semantic Model/Dataset 

Is there a way to see and check how it perform? Trying to see if there is a way to optimize. 

[collinsg · Accepted solution]

Good day v_mark,

Chris Webb has a great post here ("Why Does Power BI Query My Data Source More Than Once?"). He addresses this area and provides links to many related areas.

Hope this helps

[collinsg · Accepted solution]

Good day v_mark,

Chris Webb has a great post here ("Why Does Power BI Query My Data Source More Than Once?"). He addresses this area and provides links to many related areas.

Hope this helps

[v_mark · Accepted solution]

@collinsg - This is gold! Thank you for sharing.