High CPU usage

[anayak-alphasense]

VS code is using very high CPU. Issue Type: Performance Issue

Why VS code is using very high CPU Usage.

VS Code version: Code 1.34.0 (a622c65b2c713c890fcf4fbf07cf34049d5fe758, 2019-05-15T21:59:37.030Z) OS version: Windows_NT x64 10.0.16299

System Info

|Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz (4 x 2594)| |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| |Load (avg)|undefined| |Memory (System)|15.89GB (7.69GB free)| |Process Argv|| |Screen Reader|no| |VM|0%|

Process Info

``` CPU % Mem MB PID Process 10 74 13196 code main 1 68 4524 window (Issue Reporter) 0 55 12100 shared-process 0 456 12568 gpu-process 0 255 12632 window (RSSFilterContent.tsx - frontend - Visual Studio Code) 0 47 10524 searchService 0 13 10904 watcherService 0 5 10928 console-window-host (Windows internal process) 0 124 11672 extensionHost 0 1378 11888 electron_node tsserver.js 0 19 7668 electron_node typingsInstaller.js typesMap.js 0 22 13680 "C:\Program Files\Microsoft VS Code\Code.exe" "c:\Program Files\Microsoft VS Code\resources\app\extensions\json-language-features\server\dist\jsonServerMain" --node-ipc --clientProcessId=11672 0 11 13192 electron-crash-reporter 0 8 13664 winpty-process 0 9 13724 console-window-host (Windows internal process) 0 4 13776 C:\Windows\System32\cmd.exe 0 35 6864 "C:\Program Files\nodejs\\node.exe" "C:\Program Files\nodejs\\node_modules\npm\bin\npm-cli.js" run build-dev 0 4 1844 electron_node config.js config.js 0 417 2564 node "C:\Users\AshishNa\Documents\AlphaSense\frontend\node_modules\.bin\\..\webpack\bin\webpack.js" --colors --config w/devapp.config.js 37 694 13720 "C:\Program Files\nodejs\node.exe" --max-old-space-size=2048 C:\Users\AshishNa\Documents\AlphaSense\frontend\node_modules\fork-ts-checker-webpack-plugin\lib\service.js ```

Workspace Info

``` | Window (RSSFilterContent.tsx - frontend - Visual Studio Code) | Folder (frontend): 3120 files | File types: svg(1014) ts(815) tsx(545) png(309) scss(172) js(41) | woff(32) woff2(28) gif(25) psd(21) | Conf files: tslint.json(3) package.json(2) tsconfig.json(1) gulp.js(1); ```

Extensions: none

[vscodebot[bot]]

(Experimental duplicate detection) Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• High CPU usage in ubuntu16.04 (#26702)
• Mac Code Helper high CPU usage (#70586)
• student (#74766)

[egamma]

Can you reproduce this in version 1.35?

[anayak-alphasense]

@egamma No I haven't tried in 1.35 But its using very high CPU in 1.34. So do you want me to update it to 1.35 ?

[hanneswidrig]

@anayak-alphasense Performance issues got significantly better with the upgrade to TypeScript 3.5.x. VSCode's performance has improved immensely with the latest stable release.

[egamma]

@anayak-alphasense yes please update to 1.35 and report back whether you still see the same performance issue.

[wclr]

I'm using the latest insiders 1.35, i'm actually quite tired of this problem. Maybe we are writing too complex TS code, that tsserver just can handle it appropriately? -)

[egamma]

@whitecolor please follow these steps to help us narrow down the problem https://github.com/microsoft/vscode/wiki/Performance-Issues

[zenoven]

same issue in 1.35.0, the VSC just suddenly run into this issue, exit VSC, restart, write some code and suddenly it just fired again and again.

in the 1.34 version I have the same issue too, it's really annoying.

[egamma]

@zenoven please follow this guide for how you can help us to narrow down performance issues https://github.com/microsoft/vscode/wiki/Performance-Issues.

[anayak-alphasense]

@egamma - I have updated to 1.35, but still the same issue persist. Could you please help me here?

[wclr]

@anayak-alphasense in your process info it seems some webpack thing fork-ts-checker-webpack-plugin eats CPU.

[cesaraaron]

Same problem here. 1.35 and even in insiders 1.36 c089daa858f34631f5f827ff8a0313bf1e2ded6d

It appears to be a problem with the integrated typescript server

[mjbvz]

@cesaraaron Please open a separate issue

@anayak-alphasense In your example, the high cpu usage looks like it is coming from a process you are running in the terminal. Can you confirm this?

[anayak-alphasense]

@mjbvz - Agree, But the same code is running smooth in other systems, not sure exactly what is the issue with my VS code.

[mjbvz]

So if you run the exact same command line script from a terminal outside of VS Code—with the same working directory and environment as you use inside of VS Code—you don't see this issue?

[anayak-alphasense]

Exactly, I tried running it via Git bash it worked smooth. Not sure if below screenshot can help you to find the issue

[mjbvz]

@Tyriar can confirm but there isn't really much a cpu usage difference between your two examples, assuming those node processes are what you are running

[marques-p44]

I'm also having an issue with typechecking and high CPU usage. It takes about 4 seconds for a typecheck to complete and show me an error, and the CPU for tsserver shoots up to 300% during that 4 seconds. I've disabled all extensions, even tried Insiders, still same issue. Here's a CPU profile: MCPU-20190620T190450.198Z.cpuprofile.txt

[marques-p44]

Ok, I think the issue has to do with my TS project. If I just use CRA to make a basic app, typescript is nice and fast again. I'm even using the same tsconfig.json file in the basic app, but no problems at all.

[mjbvz]

@marques-p44 Please open a separate issue

[mjbvz]

Closing more info is needed from the original poster to determine if this is actually an issue with VS Code