Summary A user’s filter selections and the filters applied at the report level (not visible to the user) can be computed via DAX functions and then exposed
Summary DAX variables can be used to optimize performance of queries against SSAS Tabular, Power BI Desktop, and Power Pivot for Excel models by re-using a DAX expression multiple times
Summary: You can raise the performance of your DAX code by applying filters in a sequential order from the most selective to least selective. The goal is
Summary: If you don’t read this blog post please just consider limiting your DAX metrics and queries to the specific columns and filter contexts required.