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DDS was temporarily pinned to 4.1.0 because 4.2.0 triggered some test failures (see https://github.com/flutter/flutter/pull/147250). Those failures should be fixed by vm_service 14.2.2, so this unpins DDS and rolls both of these packages (along with devtools_shared, which is a DDS dependency). (If the bot updates vm_service before this is done, I can rebase over that will reduce the size of this PR to just a few files)
complex_layout
Scrolling benchmark
To 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 benchmark
To measure startup time on a device:
flutter run --profile --trace-startup
The results should be in the logs.
Additional results should be in the file build/start_up_info.json.