TypeScript and JavaScript Language Features

[lexxwork]

Issue Type: Performance Issue

after vscode update experience a high load cpu if "TypeScript and JavaScript Language Features" builtin extention enabled

• switched to @next ("TypeScript and JavaScript Language Features" CPU 100% TypeScript#37718 (comment)) - still the same
• initializing js/ts language features never completes, but the ts server is working, tracing and logs don't show any problems.

VS Code version: Code 1.59.0 (379476f, 2021-08-04T23:13:20.182Z)
OS version: Linux x64 5.4.0-80-generic
Restricted Mode: No

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz (8 x 3192)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: disabled_off opengl: enabled_on rasterization: disabled_software skia_renderer: enabled_on video_decode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	2, 2, 2
Memory (System)	11.62GB (0.26GB free)
Process Argv	. --crash-reporter-id f35ec7ca-84c1-443f-9fde-a3fb5e570bb6
Screen Reader	no
VM	0%
DESKTOP_SESSION	budgie-desktop
XDG_CURRENT_DESKTOP	Budgie:GNOME
XDG_SESSION_DESKTOP	budgie-desktop
XDG_SESSION_TYPE	x11

Process Info

CPU %	Mem MB	   PID	Process
    0	   167	  7791	code main
    0	    36	  7795	   zygote
    0	    95	  7826	     gpu-process
    0	    36	  7796	   zygote
    0	     0	  7798	     zygote
    0	    83	 49184	       window (Issue Reporter)
    0	    59	  7844	   utility
    0	   131	  7922	   shared-process
    0	    59	  7945	     ptyHost
    0	     0	  8037	       /bin/bash
    0	     0	 49204	     /bin/sh -c /bin/ps -ax -o pid=,ppid=,pcpu=,pmem=,command=
    0	     0	 49205	       /bin/ps -ax -o pid=,ppid=,pcpu=,pmem=,command=
    0	   309	 36952	   window (ads-stream.js - hls-lab - Visual Studio Code)
    0	   178	 36990	     extensionHost
    0	    83	 37044	       /usr/share/code/code /usr/share/code/resources/app/extensions/json-language-features/server/dist/node/jsonServerMain --node-ipc --clientProcessId=36990
    0	    59	 37336	       /usr/local/bin/node /home/lexx/.vscode/extensions/dbaeumer.vscode-eslint-2.1.23/server/out/eslintServer.js --node-ipc --clientProcessId=36990
    0	   107	 48227	       electron_node tsserver.js 
    0	    59	 37013	     watcherService
    0	    59	 37054	     searchService

Workspace Info

|  Window (ads-stream.js - hls-lab - Visual Studio Code)
|    Folder (hls-lab): 82 files
|      File types: ts(30) m3u8(15) js(10) json(6) editorconfig(1) gitignore(1)
|                  md(1) yaml(1) html(1) sh(1)
|      Conf files: launch.json(1) settings.json(1) tasks.json(1)
|                  jsconfig.json(1) package.json(1)
|      Launch Configs: node(2);

Extensions (40)

Extension	Author (truncated)	Version
vscode-m3u	af4	1.0.0
TabOut	alb	0.2.0
vscode-color	ans	0.4.5
htmltagwrap	bra	0.0.7
vscode-tailwindcss	bra	0.6.13
bracket-pair-colorizer	Coe	1.0.61
transformer	dak	1.11.2
vscode-eslint	dba	2.1.23
breakpointio	dec	0.0.1
xml	Dot	2.5.1
gitlens	eam	11.6.0
EditorConfig	Edi	0.16.4
json-tools	eri	1.0.2
prettier-vscode	esb	8.1.0
html-slim-scss-css-class-completion	gen	1.7.8
Python-autopep8	him	1.0.2
beautify	Hoo	1.5.0
rest-client	hum	0.24.5
vscode-edit-csv	jan	0.6.0
dupchecker	jia	0.1.7
csharpfixformat	Leo	0.0.84
vscode-csproj	luc	0.7.0
python	ms-	2021.8.1105858891
vscode-pylance	ms-	2021.8.1
jupyter	ms-	2021.8.1195043623
remote-containers	ms-	0.191.0
remote-ssh	ms-	0.65.7
remote-ssh-edit	ms-	0.65.7
remote-wsl	ms-	0.58.2
vscode-remote-extensionpack	ms-	0.21.0
cpptools	ms-	1.5.1
vscode-typescript-next	ms-	4.5.20210816
debugger-for-chrome	msj	4.12.12
vetur	oct	0.34.1
material-icon-theme	PKi	4.9.0
vscode-commons	red	0.0.6
vscode-xml	red	0.18.0
vue-vscode-snippets	sdr	2.2.1
language-stylus	sys	1.13.0
JavaScriptSnippets	xab	1.8.0

(2 theme extensions excluded)

A/B Experiments

vsliv368cf:30146710
vsreu685:30147344
python383:30185418
pythonvspyt602:30300191
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstes516:30244333
pythonvspyt639:30300192
pythontb:30283811
pythonptprofiler:30281270
vsdfh931:30280409
vshan820:30294714
vstes263:30335439
pythondataviewer:30285071
pythonvsuse255:30340121
vscod805:30301674
pythonvspyt200:30340761
vscextlang:30333561
binariesv615:30325510
vsccppwt:30329788
pythonvssor306:30344512
bridge0708:30335490
vstre464:30350172
bridge0723:30353136

[lexxwork]

-have disabled all installed extensions
-been downgrade subsequently to 1.58.2, 1.58.1, 1.57.1, 1.56.1 - and still get the same symptoms
i think it's a system problem but i don't know what to inspect

[mjbvz]

Does this reproduce in the latest VS Code insiders build with all extensions disabled?

[lexxwork]

vscode 1.60.0-insider

[mjbvz]

Does this happen for every project you open? Can you share the project that causes this issue?

[lexxwork]

It happens only if I have .jsconfig.json in project with such content:

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es2020",
    "checkJs": false
  },
  "exclude": ["node_modules"]
}

[mjbvz]

Can you share the project that causes this?

[lexxwork]

I have figured out the problem
I have added video files with .ts extension and this is subject.
I have solved the problem excluding folders, thank you for support )
The issue can be closed.

[mjbvz]

Great find!

This is actually being tracked upstream by microsoft/TypeScript#21136