Take a Deep Dive into Filtering in DAX

DAX query performance is analyzed to understand what happens when filters are applied within an expression. Using DAX Studio and server timings, the article compares the execution plans for simple filters versus using the FILTER() function. It demonstrates how the query engine's Storage Engine (SE) and Formula Engine (FE) process these filters, often optimizing them into a single, efficient SE query. The analysis also extends to scenarios with multiple filters and when filters are moved inside a measure, showing how the engine's behavior changes.