Learn how to use the function EARLIER in DAX/ Powerpivot.
Link to pbix and excel file: https://curbal.com/blog/glossary/earlier-dax
EARLIER is mostly used in the context of calculated columns.
The performance of EARLIER might be slow because it theoretically, it might have to perform a number of operations that is close to the total number of rows (in the column) times the same number (depending on the syntax of the expression). For example if you have 10 rows in the column, approximately a 100 operations could be required; if you have 100 rows then close to 10,000 operations might be performed.
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