How does relationship direction affect performance?

< 1 min read

Relationship direction affects performance because it determines how filters propagate between tables.
In one project, a bidirectional relationship caused unnecessary filter propagation, slowing report visuals.
Single-direction relationships limit filter flow and reduce calculation overhead.
Complex DAX measures on bidirectional relationships triggered repeated context evaluation.
High-cardinality tables with incorrect direction increased memory and CPU usage.
We optimized by using single-direction relationships wherever possible.
Bridge tables were introduced instead of bidirectional links for many-to-many scenarios.
So relationship direction impacts filter behavior, DAX calculation, and overall performance.

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