High CPU usage

[BeiJiXingYu]

Issue Type: Performance Issue

使用中cpu占用率会突然升高至90%以上，关闭VScode后恢复正常

VS Code version: Code 1.32.2 (e64cb27, 2019-03-13T02:00:46.035Z)
OS version: Windows_NT x64 10.0.17134

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz (8 x 3408)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: enabled surface_synchronization: enabled_on video_decode: enabled webgl: enabled webgl2: enabled
Memory (System)	7.95GB (3.07GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions (33)

Extension	Author (truncated)	Version
html-snippets	abu	0.2.1
vscode-javascript-snippet-pack	aka	0.1.5
npm-intellisense	chr	1.3.0
path-intellisense	chr	1.4.2
cssrem	cip	0.0.7
vscode-simpler-icons	dav	1.6.5
vscode-eslint	dba	1.8.2
jquerysnippets	don	0.0.1
vscode-html-css	ecm	0.2.0
vscode-nginx-conf-hint	han	0.1.0
beautify	Hoo	1.5.0
weex	jay	0.4.0
docthis	joe	0.7.1
svn-scm	joh	1.48.1
prettify-json	moh	0.0.3
easy-less	mrc	1.4.5
vscode-less	mrm	0.6.3
vscode-language-pack-zh-hans	MS-	1.32.4
mssql	ms-	1.5.0
js-atom-grammar	ms-	0.1.14
debugger-for-chrome	msj	4.11.3
vetur	oct	0.19.5
es6-css-minify	olb	2.6.0
vuehelper	oys	0.1.0
vscode-versionlens	pfl	0.23.0
material-icon-theme	PKi	3.7.0
vscode-css-peek	pra	2.2.0
vscode-jsp	pth	0.0.2
view-in-browser	qin	0.0.5
sass-indented	rob	1.5.1
vscode-nginx	sha	0.6.0
language-stylus	sys	1.11.0
ayu	tea	0.18.0

(2 theme extensions excluded)

[RMacfarlane]

Hey @BeiJiXingYu , can you follow the guide here to try to diagnose the problem? https://github.com/Microsoft/vscode/wiki/Performance-Issues

[zehawki]

Its impossible to use VS Code like this. Can we have a solution please. Pretty please. High CPU usage issue has been pointed out so many times now at SO, github, reddit and so on.

1. Nearly constant CPU usage of close to 40%. I'm doing nothing on VS Code right now, still the constant CPU usage.

2. Every time I type, the CPU usage spikes,

3. Periodically it will reach 80 - 90% and just stay there till I close VS Code and then the rigmarole starts again.

NO extensions are enabled.

[zehawki]

VS Code version: Code 1.33.1 (51b0b28, 2019-04-11T08:27:14.102Z)
OS version: Windows_NT x64 10.0.17763

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz (4 x 2400)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: enabled surface_synchronization: enabled_on video_decode: enabled webgl: enabled webgl2: enabled
Memory (System)	15.90GB (2.21GB free)
Process Argv
Screen Reader	no
VM	0%

Process Info

CPU %	Mem MB	   PID	Process
    1	    93	 54260	code main
    1	    66	 41424	   window (Issue Reporter)
    0	   293	 42488	   window (● location_card.js - ne_frontend (Workspace) - Visual Studio Code)
    0	    13	 50572	     electron-crash-reporter
    0	    89	 53220	     extensionHost
   27	   981	 65512	       electron_node tsserver.js 
    0	    44	 44940	         electron_node typingsInstaller.js typesMap.js 
    0	    38	 58528	     watcherService
    0	    33	 62268	     searchService
    0	   255	 62388	   gpu-process
    0	    72	 64456	   shared-process

Workspace Info

|  Window (● location_card.js - ne_frontend (Workspace) - Visual Studio Code)
|    Folder (ne_frontend): more than 29294 files
|      File types: js(14399) ts(6350) json(2504) md(1882) map(859) png(230)
|                  yml(205) svg(201) flow(198) mjs(162)
|      Conf files: package.json(1384) tsconfig.json(52) makefile(28)
|                  webpack.config.js(10) tslint.json(7) grunt.js(4) gulp.js(3)
|                  settings.json(2);

Extensions: none

[RMacfarlane]

Thanks for the additional info @zehawki, from the process info it looks like the typescript server is what's using high CPU for you. Are you in a workspace that has @types/styled-components installed? Please make sure it's the latest version (see this issue)

@BeiJiXingYu can you also include process information?

[zehawki]

Are you in a workspace that has @types/styled-components installed?

Sorry, a bit of a stupid question - how do I check that? I've not installed any package for this, neither is it in my package.json. But could it have come in via a library, e.g. like this https://material-ui.com which I'm using. Where can I check? Thanks.

[leolozes]

I'm having the same issue, the electron_node tsserver.js process uses 20-30% of the CPU constantly.
I'm using material-ui as well.
I already had the same issue and fixed it before but this should be fixed without having to do this manually every time.

[mjbvz]

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

[leolozes]

@mjbvz I don't recall having this issue with the latest insider build. I had it with the last and current VS Code releases, and I fixed it both times with the workaround I linked.

[mjbvz]

Closing as we need more information from @BeiJiXingYu

IF you are still seeing performance issues in the latest VS Code insiders build, please open a new issue