# Macrobenchmarks | |
Performance benchmarks using flutter drive. | |
## Cull opacity benchmark | |
To run the cull opacity benchmark on a device: | |
``` | |
flutter drive --profile test_driver/cull_opacity_perf.dart | |
``` | |
Results should be in the file `build/cull_opacity_perf.timeline_summary.json`. | |
More detailed logs should be in `build/cull_opacity_perf.timeline.json`. |