Significant lag and performance degradation in VSCode with Volar on

Issue Type: Bug

This issue is a recent one, perhaps related to the recent update?

Extension version: 0.38.9 VS Code version: Code 1.69.1 (b06ae3b2d2dbfe28bca3134cc6be65935cdfea6a, 2022-07-12T08:22:10.822Z) OS version: Darwin arm64 21.5.0 Restricted Mode: No

System Info

Item	Value
CPUs	Apple M1 Pro (10 x 24)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled
Load (avg)	8, 10, 10
Memory (System)	16.00GB (0.09GB free)
Process Argv	–crash-reporter-id 2999e9bf-ef35-4154-bed3-74f44259cdaf
Screen Reader	yes
VM	0%

A/B Experiments

vsliv368:30146709
vsreu685:30147344
python383:30185418
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstes627:30244334
vslsvsres303:30308271
pythonvspyl392:30443607
vserr242cf:30382550
pythontb:30283811
vsjup518:30340749
pythonvspyt551cf:30345471
pythonptprofiler:30281270
vsdfh931cf:30280410
vshan820:30294714
vstes263:30335439
vscoreces:30445986
pythondataviewer:30285071
vscod805cf:30301675
binariesv615:30325510
bridge0708:30335490
bridge0723:30353136
vsaa593cf:30376535
vsc1dst:30438360
pythonvs932:30410667
wslgetstarted:30449410
vscscmwlcmt:30465135
cppdebug:30492333
pylanb8912:30529769
vsclangdf:30486550
841h4636:30531698

[johnsoncodehk]

For peoples who still has performance issue with latest version, you can try:

1. Disable javascript.suggest.autoImports and typescript.suggest.autoImports in workspace settings.
2. Try enable volar.vueserver.useSecondServer in workspace settings for better performance, or disable it for less memory usage.
3. Delete node_modules and check did problems gone or not. If yes, delete package.json dependencies / devDependencies one by one to see which package lead to problems. (If this is the reason, the package usually has lot of .d.ts files.)
4. Try Takeover mode.
5. (Advanced) Investigate (Performance Tracing)[https://github.com/microsoft/TypeScript-wiki/blob/main/Performance-Tracing.md] use vue-tsc.

Close this issue because do not have anymore helpful information, if you can confirm the performance from plugin, please open a new issue with append repro case or profiling record.

[yanbowe]

It’s too slow to use