[Web] Very slow fetching of 40MB js file in debug mode #81010
Description
First sorry to add to a lot of performance related issues, such as #76009.
If this seems to be already covered in a different issue, please close this one.
Description
I am using the fhir package. It includes a generated code file with 17K LOC which results in ~40MB javascript file in web debug mode.
For some reason these 40MB take up to 10min to load in web debug mode.
Even after all other files are fetched in still takes 5min for the remaining 20MB.
Expected behavior
Locally generated file should be fetched much faster.
Reproducible steps
Clone repo: https://github.com/hpi-studyu/studyu
Run study_designer:
cd study_designer
flutter run -d chrome
Image of Chrome DevTools Network tab
Exported HAR file from Chrome DevTools Network tab
flutter doctor -v
[✓] Flutter (Channel beta, 2.2.0-10.1.pre, on Microsoft Windows [Version 10.0.21364.1], locale de-DE)
• Flutter version 2.2.0-10.1.pre at C:\Users\nilss\flutter
• Framework revision 0941968447 (7 days ago), 2021-04-15 12:01:02 -0700
• Engine revision d2a2e93510
• Dart version 2.13.0 (build 2.13.0-211.6.beta)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at C:\Users\nilss\AppData\Local\Android\Sdk
• Platform android-S, build-tools 30.0.3
• ANDROID_HOME = C:\Users\nilss\AppData\Local\Android\Sdk
• Java binary at: C:\Users\nilss\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-0\202.7231092\jre\bin\java
• Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)
• All Android licenses accepted.
[✓] Chrome - develop for the web
• Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
[✓] Visual Studio - develop for Windows (Visual Studio Community 2019 16.9.4)
• Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
• Visual Studio Community 2019 version 16.9.31205.134
• Windows 10 SDK version 10.0.19041.0
[✓] Android Studio
• Android Studio at C:\Users\nilss\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-0\202.7231092
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin version 202.8346
• android-studio-dir = C:\Users\nilss\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-0\202.7231092
• Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)
[✓] Connected device (4 available)
• sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64 • Android 11 (API 30) (emulator)
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.21364.1]
• Chrome (web) • chrome • web-javascript • Google Chrome 90.0.4430.85
• Edge (web) • edge • web-javascript • Microsoft Edge 90.0.818.42
• No issues found!