Stuttering while scrolling PlatformViews only on iPhone 12 onwards (works on iPhone 7) #129632
Description
Details
We have performance issues with PlatformViews inside ListView only on iPhone 12 onwards.
Tested on iPhone 7, iPhone 7 iPhone 11, iPhone 12, iPhone 12 Pro, iPhone 13, iPhone 13 Pro and iPhone 14 Pro.
We can exclude ProMotion to be the culprit because iPhone 12, iPhone 12 Pro and iPhone 13 don't have it.
While scrolling on an iPhone 12 Pro we see strange stuttering (vsync?) with some slow raster phase that causes the frame rate to be unstable around 53/55 fps and sometimes drops to 48 fps.
On iPhone 7 and iPhone 11 the issue is not present with a mostly stable framerate.
Sample project available at https://github.com/llooz/flutter_ads_list_perf.
We're able to offer any kind of support to help solve this issue.
Here are some video recordings and tracings:
| iphone 12 | iphone 7 |
|---|---|
flutter-ads-perf-iphone12pro.MP4 |
flutter-ads-perf-iphone7.MP4 |
flutter-ads-perf-iphone-12-pro-trace.json.zip
flutter-ads-perf-iphone-7-trace.json.zip
Target Platform: iOS
Target OS version: any
Devices: iPhone 12, iPhone 12 Pro, iPhone 13, iPhone 13 Pro, iPhone 14, iPhone 14 Pro
Logs
Logs
[✓] Flutter (Channel stable, 3.10.5, on macOS 13.3.1 22E772610a darwin-arm64,
locale it-IT)
• Flutter version 3.10.5 on channel stable at /Users/lucalooz/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 796c8ef792 (2 weeks ago), 2023-06-13 15:51:02 -0700
• Engine revision 45f6e00911
• Dart version 3.0.5
• DevTools version 2.23.1
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
• Android SDK at /Users/lucalooz/Library/Android/sdk
• Platform android-33, build-tools 33.0.1
• ANDROID_HOME = /Users/lucalooz/Library/Android/sdk
• ANDROID_SDK_ROOT = /Users/lucalooz/Library/Android/sdk
• Java binary at: /Applications/Android
Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build
17.0.6+0-17.0.6b802.4-9586694)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 14.3.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 14E300c
• CocoaPods version 1.12.1
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2022.2)
• 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
17.0.6+0-17.0.6b802.4-9586694)
[✓] VS Code (version 1.79.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.66.0
[✓] Connected device (4 available)
• IdeaSolutions-iPhone7 (mobile) • 02b7b207ed91e990333780ea7254fa82e8156f4b
• ios • iOS 14.8 18H17
• iPhone di Luca (2) (mobile) • 00008101-001058A20A80001E
• ios • iOS 16.5.1 20F75
• macOS (desktop) • macos
• darwin-arm64 • macOS 13.3.1 22E772610a darwin-arm64
• Chrome (web) • chrome
• web-javascript • Google Chrome 114.0.5735.133
[✓] Network resources
• All expected network resources are available.
• No issues found!