A developer notices that a Power BI report runs slowly because a complex DAX measure is evaluated repeatedly for each row in a matrix visual. Which optimization technique should they apply first?

Question

Power BI — Hard

A developer notices that a Power BI report runs slowly because a complex DAX measure is evaluated repeatedly for each row in a matrix visual. Which optimization technique should they apply first?

Accepted Answer

The complex DAX measure's repeated evaluation slows the report. Using variables (VAR) to store intermediate results optimizes performance. This approach reduces calculations by storing intermediate values.