vue language tools not working / bad performance

[boernard]

Summary

The volar extension is not usable because code hints don't load.

I have a small nuxt project (4 components, 2 pages) with the following dev dependencies in package.json

  "devDependencies": {
    "@nuxt/devtools": "latest",
    "@nuxtjs/tailwindcss": "^6.8.0",
    "@types/node": "^18.17.3",
    "autoprefixer": "^10.4.15",
    "nuxt": "^3.6.5",
    "postcss": "^8.4.28",
    "tailwindcss": "^3.3.3",
    "typescript": "^5.2.2",
    "volar": "^0.0.2",
    "volar-service-vetur": "latest"
  }

Whenever I hover over a component, the code hint stays in the state Loading... and never actually finishes loading. The CPU process for the volar extension goes up to >85%. Same result when I start writing a component and press CMD + space, it stays in the Loading state.

Also VSCode's status bar keeps indicating Initializing JS/TS language features

System setup

Apple M2 Visual Studio Code 1.85 TypeScript Vue Plugin (Volar) v1.8.25 Vue Language Features (Volar) v1.8.25

for profiling I pulled the current master of https://github.com/vuejs/language-tools at b8627e7

CPU-20231213T170606.cpuprofile.zip

when I open output in the vscode window and go to vue semantic server I get the following output vueSemanticServer.txt

Additional info

When I installed the volar language extension in Sublime, also there it doesn't work. Node process goes up in CPU usage and then continously crashes.

[funny-cat-happy]

I have the same problem as you. And my intellisense have slowed down.

[huzaifahj]

Identical setup as OP. Intellisense is very slow and code actions have to be disabled to get a sane file saving time.

[machao7]

any feedback?

[DanielViberg]

Experiencing the same in larger components.

[s3xysteak]

The same issue too. I am using Vue.volar & Vue.vscode-typescript-vue-plugin & takeover mode, It is so slow in both .ts .vue, which makes me feel so sad. But it works greet in .js with only Vue.volar and no takeover mode.

[douglasg14b]

Intelisense is a multi-second operation now, it's cripplingly bad.

[huzaifahj]

Is anyone looking into this? Vue could have the best feature set and this would still be a deal-breaker for any serious project in 2024.

[johnsoncodehk]

Thanks for your report, the performance issues caused by vue semantic server have been resolved in v2 via #3788.

[boernard]

For me it didn't get resolved... I quickly uninstalled volar, reinstalled the vue - official extensions, restarted and tried a couple of other things but still, the behaviour is the same. I am on vscode 1.91.1