[desktop] toImageSync retains display list which can lead to surprising memory retention #138627
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
- run example
- wait 40~60 to see memory leak on the OS memory monitor that is not seen in DevTools
Actual results
All the PC memory get filled till system crash
Code sample
I have created a public GitHub project as short as I could.
Some more info in the README.md
Screenshots or Video
After about 40~60 seconds memory leak is starting growing till it reach 100%.
DevTools memory tab doesn't show memory leaks.
Screenshots
Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.16.0, on Manjaro Linux 6.1.62-1-MANJARO, locale en_US.UTF-8)
• Flutter version 3.16.0 on channel stable at /home/deimos/dev/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision db7ef5bf9f (2 days ago), 2023-11-15 11:25:44 -0800
• Engine revision 74d16627b9
• Dart version 3.2.0
• DevTools version 2.28.2
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
• Android SDK at /home/deimos/Android/Sdk
• Platform android-34, build-tools 34.0.0
• ANDROID_HOME = /home/deimos/Android/Sdk
• ANDROID_SDK_ROOT = /home/deimos/Android/Sdk
• Java binary at: /home/deimos/dev/android-studio/jbr/bin/java
• Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)
• All Android licenses accepted.
[✓] Chrome - develop for the web
• CHROME_EXECUTABLE = /bin/chromium
[✓] Linux toolchain - develop for Linux desktop
• clang version 16.0.6
• cmake version 3.27.7
• ninja version 1.11.1
• pkg-config version 1.8.1
[✓] Android Studio (version 2022.2)
• Android Studio at /home/deimos/dev/android-studio
• Flutter plugin version 75.1.1
• Dart plugin version 222.4582
• Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)
[✓] Connected device (2 available)
• Linux (desktop) • linux • linux-x64 • Manjaro Linux 6.1.62-1-MANJARO
• Chrome (web) • chrome • web-javascript • Chromium 119.0.6045.159 Arch Linux
[✓] Network resources
• All expected network resources are available.
• No issues found!Metadata
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Issue needs retriaging to evaluate its popularityImportant issues not at the top of the work listRunning on desktopRelates to speed or footprint issues (see "perf:" labels)Affects or could affect many people, though not necessarily a specific customer.flutter/engine related. See also e: labels.Found to occur in 3.16Found to occur in 3.17The issue has been confirmed reproducible and is ready to work onPerformance issues related to memoryOwned by Engine teamTriaged by Engine team