Closed
Description
Flutter 2.8, fine frame drop detected in native listview on iOS.
This is normal in flutter 2.5.
Create a listview with about 200 items.. If you scroll slowly and smoothly at a constant speed, you may find it stuttering.
2.5 example url : https://drive.google.com/file/d/1v9q2T6m_haEdvbV416rC9bhObAZ4HHFy/view?usp=sharing
2.8 example url : https://drive.google.com/file/d/1_1Xq7Fw03AaSKGQ3DA6OIQjKYQN7mR9i/view?usp=sharing
sample code
import 'package:flutter/material.dart';
void main() {
runApp(const App());
}
class App extends StatefulWidget {
const App({Key? key}) : super(key: key);
@override
_AppState createState() => _AppState();
}
class _AppState extends State<App> {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: const Text("Flutter 2.8 Test")),
body: ListView.separated(
separatorBuilder: (_, __) => const Divider(),
itemCount: 200,
itemBuilder: (context, index) {
return ListTile(
key: ValueKey(index),
title: Text("item $index"),
);
},
),
),
);
}
}Metadata
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Important issues not at the top of the work listRelates to speed or footprint issues (see "perf:" labels)It was better in the past than it is nowflutter/engine repository. See also e: labels.Viewports, list views, slivers, etc.Found to occur in 2.8Found to occur in 2.9flutter/packages/flutter repository. See also f: labels.The issue has been confirmed reproducible and is ready to work onPerformance issues related to (mostly rendering) speediOS applications specificallyIssue is closed as already fixed in a newer version
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idompolo commentedon Dec 27, 2021
Same in master version (2.9.0--1.0.pre.199)
jiabin87428 commentedon Dec 27, 2021
jiabin87428 commentedon Dec 27, 2021
Also in the swipe return
hubertqiu commentedon Dec 27, 2021
JangHyun0828 commentedon Dec 27, 2021
Ec7i9se commentedon Dec 27, 2021
[-]Flutter 2.8, fine frame drop detected in native listview on iOS.[/-][+][iOS] Flutter 2.8, fine frame drop detected in native listview on iOS.[/+]mamuseferha commentedon Dec 28, 2021
Hi @idompolo, I verified on the latest stable and master channel and it is reproducible.
output
2.5test.mp4
2.8test.mp4
flutter doctor -v
[✓] Flutter (Channel stable, 2.8.1, on macOS 12.1 21C52 darwin-x64, locale en-US) • Flutter version 2.8.1 at /Users/flo/development/flutter • Upstream repository https://github.com/flutter/flutter.git • Framework revision 77d935af4d (12 days ago), 2021-12-16 08:37:33 -0800 • Engine revision 890a5fca2e • Dart version 2.15.1 [✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0) • Android SDK at /Users/flo/Library/Android/sdk • Platform android-31, build-tools 31.0.0 • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165) • All Android licenses accepted. [✓] Xcode - develop for iOS and macOS (Xcode 13.1) • Xcode at /Applications/Xcode.app/Contents/Developer • CocoaPods version 1.11.0 [✓] Chrome - develop for the web • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome [✓] Android Studio (version 2020.3) • Android Studio at /Applications/Android Studio.app/Contents • Flutter plugin can be installed from: 🔨 https://plugins.jetbrains.com/plugin/9212-flutter • Dart plugin can be installed from: 🔨 https://plugins.jetbrains.com/plugin/6351-dart • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165) [✓] VS Code (version 1.62.3) • VS Code at /Applications/Visual Studio Code.app/Contents • Flutter extension version 3.29.0 [✓] Connected device (4 available) • sdk gphone x86 (mobile) • emulator-5554 • android-x86 • Android 11 (API 30) (emulator) • iPhone 13 (mobile) • EF1251D3-C9C4-475E-9F91-58CD010FDA48 • ios • • iPhone (mobile) • 7a7ab8dfee530a7b4f54e3e3c3544a66a506fdae • ios • iOS 14.4.2 18D70 com.apple.CoreSimulator.SimRuntime.iOS-15-0 (simulator) • macOS (desktop) • macos • darwin-x64 • macOS 12.1 21C52 darwin-x64 • Chrome (web) • chrome • web-javascript • Google Chrome 93.0.4577.63 • No issues found![✓] Flutter (Channel master, 2.9.0-1.0.pre.205, on macOS 12.1 21C52 darwin-x64, locale en-US) • Flutter version 2.9.0-1.0.pre.205 at /Users/flo/fvm/versions/master • Upstream repository https://github.com/flutter/flutter.git • Framework revision 6ec059c994 (3 hours ago), 2021-12-28 00:29:08 -0500 • Engine revision 31fcaf3ce4 • Dart version 2.16.0 (build 2.16.0-134.0.dev) • DevTools version 2.9.2 [✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0) • Android SDK at /Users/flo/Library/Android/sdk • Platform android-31, build-tools 31.0.0 • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165) • All Android licenses accepted. [✓] Xcode - develop for iOS and macOS (Xcode 13.1) • Xcode at /Applications/Xcode.app/Contents/Developer • CocoaPods version 1.11.0 [✓] Chrome - develop for the web • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome [✓] Android Studio (version 2020.3) • Android Studio at /Applications/Android Studio.app/Contents • Flutter plugin can be installed from: 🔨 https://plugins.jetbrains.com/plugin/9212-flutter • Dart plugin can be installed from: 🔨 https://plugins.jetbrains.com/plugin/6351-dart • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165) [✓] VS Code (version 1.62.3) • VS Code at /Applications/Visual Studio Code.app/Contents • Flutter extension version 3.29.0 [✓] Connected device (4 available) • sdk gphone x86 (mobile) • emulator-5554 • android-x86 • Android 11 (API 30) (emulator) • iPhone 13 (mobile) • EF1251D3-C9C4-475E-9F91-58CD010FDA48 • ios • com.apple.CoreSimulator.SimRuntime.iOS-15-0 (simulator) • iPhone (mobile) • 7a7ab8dfee530a7b4f54e3e3c3544a66a506fdae • ios • iOS 14.4.2 18D70 • macOS (desktop) • macos • darwin-x64 • macOS 12.1 21C52 darwin-x64 • Chrome (web) • chrome • web-javascript • Google Chrome 93.0.4577.63 [✓] HTTP Host Availability • All required HTTP hosts are available • No issues found!Thank you
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