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P2Important issues not at the top of the work listImportant issues not at the top of the work listc: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)f: scrollingViewports, list views, slivers, etc.Viewports, list views, slivers, etc.found in release: 3.13Found to occur in 3.13Found to occur in 3.13found in release: 3.17Found to occur in 3.17Found to occur in 3.17frameworkflutter/packages/flutter repository. See also f: labels.flutter/packages/flutter repository. See also f: labels.has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work onp: two_dimensional_scrollablesIssues pertaining to the two_dimensional_scrollables packageIssues pertaining to the two_dimensional_scrollables packagepackageflutter/packages repository. See also p: labels.flutter/packages repository. See also p: labels.team-frameworkOwned by Framework teamOwned by Framework teamtriaged-frameworkTriaged by Framework teamTriaged by Framework team
Description
Is there an existing issue for this?
- I have searched the existing issues
- I have read the guide to filing a bug
Steps to reproduce
- Update the example app in the 2d-scrollables package to start with 1.5 million rows by editing
int _rowCount = 1500000; - Run the app
flutter run -d mac --release - Click the "Jump to bottom"
- Attempt to scroll
Expected results
Scroll without janking
Actual results
Getting ~1 frame every 1-2 seconds
Code sample
Update the example app in the 2d-scrollables package to start with 1.5 million rows by editing int _rowCount = 1500000;
Screenshots or Video
Screenshots / Video demonstration
large.row.count.mov
Logs
No response
Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.13.9, on macOS 14.1 23B74 darwin-arm64, locale
en-US)
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
[!] Xcode - develop for iOS and macOS (Xcode 15.0.1)
✗ Unable to get list of installed Simulator runtimes.
[✓] Chrome - develop for the web
[✓] Android Studio (version 2021.2)
[✓] VS Code (version 1.84.0)
[✓] Connected device (2 available)
[✓] Network resourcesHudsonAfonso
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Labels
P2Important issues not at the top of the work listImportant issues not at the top of the work listc: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)f: scrollingViewports, list views, slivers, etc.Viewports, list views, slivers, etc.found in release: 3.13Found to occur in 3.13Found to occur in 3.13found in release: 3.17Found to occur in 3.17Found to occur in 3.17frameworkflutter/packages/flutter repository. See also f: labels.flutter/packages/flutter repository. See also f: labels.has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work onp: two_dimensional_scrollablesIssues pertaining to the two_dimensional_scrollables packageIssues pertaining to the two_dimensional_scrollables packagepackageflutter/packages repository. See also p: labels.flutter/packages repository. See also p: labels.team-frameworkOwned by Framework teamOwned by Framework teamtriaged-frameworkTriaged by Framework teamTriaged by Framework team