Reddit startup idea
DAX Performance Regression Gate
A CI-style performance testing service for Power BI semantic models that automatically benchmarks common visual query patterns (e.g., high-cardinality matrices) and flags DAX changes that cause slowdowns or memory blowups. It produces actionable guidance like "replace SWITCH/parameter pattern with calculation group" and stores baselines so teams can prevent regressions before deploying to production.
- Subreddit: powerbi
- Industry: Data Science & Analytics
- Target date: 2026-03-19
- Upvotes: 29
- Comments: 5
Suggested product
DAX Performance Regression Gate
A CI-style performance testing service for Power BI semantic models that automatically benchmarks common visual query patterns (e.g., high-cardinality matrices) and flags DAX changes that cause slowdowns or memory blowups. It produces actionable guidance like "replace SWITCH/parameter pattern with calculation group" and stores baselines so teams can prevent regressions before deploying to production.
Target customer
Power BI teams in mid-market and enterprise (BI developers, analytics engineers, COE leads) maintaining shared datasets/semantic models with frequent changes and multiple report dependents.
Problem-solution fit
The post shows that small modeling choices can swing performance by ~10 seconds on cold cache and cause resource failures, especially in dense matrices. Teams need a repeatable, automated way to detect when a new measure/pattern introduces Formula Engine bottlenecks versus Storage Engine-friendly approaches, without relying on a single expert to run ad-hoc DAX Studio tests.
Keywords
- Power BI
- DAX
- DAX Studio
- calculation groups
- performance testing