Why is Power Apps slow?
Power Apps performance problems usually build up gradually. Good optimisation starts with measurement rather than guesswork.
01
1. Delegation can affect correctness as well as speed
A non-delegable query may not run over the complete data source, so larger datasets can produce incomplete results as well as poor performance.
- delegation warning
- data-source capability
- filtering and sorting
- large datasets
02
2. Many small network calls add up
Repeated Lookup, ForAll and chained queries can create N+1 patterns that feel slow even when each individual call is small.
- N+1 query pattern
- ForAll
- repeated Lookup
- server-side processing
03
3. Do not preload everything
Copying large lists into local collections increases startup time and memory use. Load what the screen actually needs.
- ClearCollect
- OnStart load
- lazy loading
- smaller payload
04
4. Measure with Monitor and Checker
Power Apps Monitor, App Checker and Solution Checker help separate network, formula, data-source and configuration issues.
- Power Apps Monitor
- App Checker
- Solution Checker
- baseline and regression