# complex_layout## Scrolling benchmarkTo run the scrolling benchmark on a device:```flutter drive --profile test_driver/scroll_perf.dart```Results should be in the file `build/complex_layout_scroll_perf.timeline_summary.json`.More detailed logs should be in `build/complex_layout_scroll_perf.timeline.json`.## Startup benchmarkTo measure startup time on a device:```flutter run --profile --trace-startup```