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"dart.previewLsp": true slows down VSCode Intellisense

See original GitHub issue

Describe the bug The latest update caused my VSCode’s Intellisense to slow down. Disabling the new setting "dart.previewLsp": false fixes the issue.

To Reproduce set "dart.previewLsp": true

Versions:

✓] Flutter (Channel stable, 2.0.1, on macOS 11.1 20C69 darwin-x64, locale en-PH)
    • Flutter version 2.0.1 at /Users/nemoryoliver/fvm/versions/stable
    • Framework revision c5a4b4029c (5 days ago), 2021-03-04 09:47:48 -0800
    • Engine revision 40441def69
    • Dart version 2.12.0

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.1)
    • Android SDK at /Users/nemoryoliver/Library/Android/sdk
    • Platform android-30, build-tools 30.0.1
    • ANDROID_HOME = /Users/nemoryoliver/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_242-release-1644-b3-6915495)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.4, Build version 12D4e
    • CocoaPods version 1.10.1

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.1)
    • 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 1.8.0_242-release-1644-b3-6915495)

[✓] VS Code (version 1.54.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.20.0

[✓] Connected device (3 available)
    • IN2010 (mobile) • 022666eb • android-arm64  • Android 11 (API 30)
    • macOS (desktop) • macos    • darwin-x64     • macOS 11.1 20C69 darwin-x64
    • Chrome (web)    • chrome   • web-javascript • Google Chrome 89.0.4389.72 beta

• No issues found!

Issue Analytics

State:
Created 3 years ago
Reactions:2
Comments:6 (2 by maintainers)

Top GitHub Comments

1reaction

kikacommented, Mar 13, 2021

With previewLsp: true the status bar shows “Analysing” spinner for tens of seconds up to a minute for every change. Project has 17Kloc of Dart code, it’s not that big. So you click on a warning, wait 30-40 seconds, apply the suggestion (or make the change manually), wait 20-40 seconds more, rinse, repeat. I was running LSP preview for a long time, but this radical slow down happened only after the switch to Flutter 2.0 and Dart 2.12

1reaction

Ali-Fadaeicommented, Mar 12, 2021

@nemoryoliver exactly! I have same issue and working in this situation is very difficult.

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