| name | powerbi-performance-refresh-optimizer |
| description | Diagnose and optimize Power BI DAX performance, Power Query folding, refresh reliability, incremental refresh, gateway behavior, schema drift, API pagination, model size, and slow visuals. |
Power BI Performance and Refresh Optimizer
Use this skill for slow reports, failed refreshes, expensive DAX, non-folding Power Query, gateway bottlenecks, large models, and unstable APIs.
Review Areas
- DAX: expensive iterators, context transition, high-cardinality filters, repeated expressions, poor time intelligence.
- Model: relationships, cardinality, unused columns, auto date/time, aggregation opportunities, calculation groups.
- Power Query: folding, type conversion order, custom functions, joins, buffering, incremental refresh boundaries.
- Refresh: gateway, credentials, privacy levels, API pagination, throttling, schema drift, timeout handling.
- Capacity: memory, CPU, visual query load, dataset size, refresh concurrency.
Output Requirements
- Separate quick wins, structural fixes, and architecture changes.
- Include expected impact, risk, and verification method.
Assets
assets/performance-refresh-checklist.md: optimizer checklist.
