Performance question combine Excel data - Better to use Transform Data or Excel.Workbook([Content])

[Anonymous]

Hi all, 

I need to combine data from multiple Excel files. The Excel files are all alike.

I am wondering what is the best method to keep my file performant.   

What is the best method to combine the data?

-> Transform Data

-> Excel.Workbook([Content])

See in this article (Loading Multiple Excel Files from a Folder in Power BI - sqlitybi) an explanation of both methods.

I have tried both methods and found that the size of my PowerBi file increased significantely with the second method (Excel.Workbook([Content]).

However this is the method that the author from the article recommends.

What are your thoughts? 

Gr, Julie

[mahoneypat]

If you are bringing in the same data and keep all the same columns with the same data types, the resulting file size should be the same.  Please check for differences in columns and/or data types.

Pat