升级到最新的 SDK 版本 1.20.4 后，运行/调试 Flutter 应用程序的速度非常慢

Question

I'm facing this problem after upgrading to latest stable version 1.20.4 Earlier I was using Flutter 1.12.13+hotfix.5 and debug/run speed was good enough. Is anyone else also facing this issue? Or could anyone help by suggesting some solutions or reasons as to why this is happening? I am using a Windows 10 machine. Running flutter doctor -v yields the following output

    • Flutter version 1.20.4 at D:\flutter
    • Framework revision fba99f6cf9 (8 days ago), 2020-09-14 15:32:52 -0700
    • Engine revision d1bc06f032
    • Dart version 2.9.2

 
[√] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at C:\Users\amani\AppData\Local\Android\Sdk
    • Platform android-29, build-tools 29.0.2
    • ANDROID_HOME = C:\Users\amani\AppData\Local\Android\Sdk
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
    • All Android licenses accepted.

[√] Android Studio (version 3.5)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 42.1.1
    • Dart plugin version 191.8593
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)

[√] VS Code (version 1.49.1)
    • VS Code at C:\Users\amani\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.14.1

[√] Connected device (1 available)
    • Android SDK built for x86 (mobile) • emulator-5554 • android-x86 • Android 10 (API 29) (emulator)

• No issues found!```

Answer 1

我有一个类似的问题，对我来说，我返回到以前的稳定版本并且一切顺利，运行flutter downgrade以返回到您机器上安装的以前的flutter downgrade版本

Answer 2

Solved the issue by deleting Flutter SDK and then replacing it with newly downloaded SDK. It seems that upgrade caused some files to get corrupted in the SDK directory.