Frame rate is locked to 60FPS on devices with frame rate optimization #35162
Description
All Flutter apps seem to be locked at 60FPS on One Plus 7 Pro that has 90Hz refresh rate. Every other app including Native apps and OpenGL games runs at 90FPS. Because of this Flutter apps feel slow compared to the rest of the operating system even though there are no performance issues or janks.
It seems apps have to somehow notify the OS that it can do higher framerates. And One Plus OxygenOS seems to do this check and switches between 60 and 90 FPS modes. This XDA article explains how this works and how you can force all apps to use 90FPS. After applying the change mentioned in the article Flutter apps run at 90FPS.
[✓] Flutter (Channel stable, v1.5.4-hotfix.2, on Mac OS X 10.14.5 18F132, locale en-IN)
• Flutter version 1.5.4-hotfix.2 at /Users/ajinasokan/flutter
• Framework revision 7a4c33425d (8 weeks ago), 2019-04-29 11:05:24 -0700
• Engine revision 52c7a1e849
• Dart version 2.3.0 (build 2.3.0-dev.0.5 a1668566e5)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/ajinasokan/Library/Android/sdk
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• Platform android-28, build-tools 28.0.3
• ANDROID_HOME = /Users/ajinasokan/Library/Android/sdk
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)
• All Android licenses accepted.
[✓] iOS toolchain - develop for iOS devices (Xcode 10.2.1)
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• Xcode 10.2.1, Build version 10E1001
• ios-deploy 1.9.4
• CocoaPods version 1.5.3
[✓] Android Studio (version 3.4)
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• Flutter plugin version 34.0.2
• Dart plugin version 183.5901
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)
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• Flutter extension version 2.25.1
[✓] Connected device (1 available)
• GM1911 • bc329e0f • android-arm64 • Android 9 (API 28)
• No issues found!