vscode: High CPU usage when VSCODE_EXTENSIONS is set and multiple Code windows are opened
Type: Performance Issue
Starting from latest release (1.71) I observe repeating spikes (every 7-10 minutes) of CPU usage (up to 100%) caused by ‘bootstrap-fork’ processes (see screenshots below). When computer is in idle state (no user activity with mouse or keyboard one process with ‘bootstrap-fork’ is running and usages 25% of CPU continuously (it seems leak).
UPD: Video recording (proof) of Task Manager what I’m talking about:
(sorry for over compressed video, but main point should be clear)
NO debug server is running.
I have 5 open Workspaces at the same time. Four of them are Python Django projects. In spite of all them are minimized (windows) frequent CPU usage continues to be a problem.
There was no such issue in previous versions of VS Code, running the same workspaces.
I tried to gather information for developers as I could, but I couldn’t find the JavaScript profiler in Developer Tools, because new window UI buttons overlap menu button (or it was removed in new version).
2022-09-06_12-21-36
Screenshots of Task Manager and Process Explorer at the moment of spike:
File with output of code --status at another spike (I changed personal workspace names):
2022-09-06_11-34 VS Code status during 100% CPU usage by bootstrap-fork.js.txt
Command output in-place
D:\tmp>code --status
Version: Code 1.71.0 (784b0177c56c607789f9638da7b6bf3230d47a8c, 2022-09-01T07:36:10.600Z)
OS Version: Windows_NT x64 10.0.19044
CPUs: Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz (4 x 3100)
Memory (System): 15.95GB (5.72GB free)
VM: 0%
Screen Reader: no
Process Argv: --crash-reporter-id c64bc5dd-3310-48ba-ac74-660a16150038
GPU Status: 2d_canvas: enabled
canvas_oop_rasterization: disabled_off
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: enabled
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
vulkan: disabled_off
webgl: enabled
webgl2: enabled
webgpu: disabled_off
CPU % Mem MB PID Process
0 105 21296 code main
0 42 3948 utility-network-service
1 176 5044 window (settings.json - Dev Settings and Snippets (Workspace) - Visual Studio Code)
0 194 8476 window (settings.py - WorkSpaceName_1 (Workspace) - Visual Studio Code)
0 27 19052 crashpad-handler
20 204 19612 extensionHost
0 78 16388 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node "c:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\json-language-features\server\dist\node\jsonServerMain" --node-ipc --clientProcessId=19612
0 130 20180 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node D:\_vscode_extensions\ms-python.vscode-pylance-2022.8.50\dist\server.bundle.js --cancellationReceive=file:89fb5d54dc37a7d7d9a16fc2d68cf5a2c11abf3b28 --node-ipc --clientProcessId=19612
0 173 21344 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node d:\_vscode_extensions\streetsidesoftware.code-spell-checker-2.7.2\packages\_server\dist\main.js --node-ipc --clientProcessId=19612
1 177 19648 window (index.html - WorkSpaceName_2 (Workspace) - Visual Studio Code)
0 103 20500 shared-process
0 82 5264 fileWatcher
0 74 5540 ptyHost
0 80 20820 fileWatcher
0 82 22324 fileWatcher
0 82 24768 fileWatcher
0 79 24896 fileWatcher
21 180 20560 extensionHost
0 169 1332 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node d:\_vscode_extensions\streetsidesoftware.code-spell-checker-2.7.2\packages\_server\dist\main.js --node-ipc --clientProcessId=20560
0 94 10848 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node "c:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\json-language-features\server\dist\node\jsonServerMain" --node-ipc --clientProcessId=20560
1 175 20732 window (admin.py - WorkSpaceName_3 (Workspace) - Visual Studio Code)
17 224 22148 extensionHost
0 188 8492 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node d:\_vscode_extensions\streetsidesoftware.code-spell-checker-2.7.2\packages\_server\dist\main.js --node-ipc --clientProcessId=22148
0 126 21364 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node D:\_vscode_extensions\ms-python.vscode-pylance-2022.8.50\dist\server.bundle.js --cancellationReceive=file:3fb89a4b32917766f47a6b7f0535342eff28fa361c --node-ipc --clientProcessId=22148
0 78 24152 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node "c:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\json-language-features\server\dist\node\jsonServerMain" --node-ipc --clientProcessId=22148
1 204 22736 window (website_tests.py -WorkSpaceName_4 (Workspace) - Visual Studio Code)
0 196 22740 extensionHost
0 172 676 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node d:\_vscode_extensions\streetsidesoftware.code-spell-checker-2.7.2\packages\_server\dist\main.js --node-ipc --clientProcessId=22740
0 79 2428 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node "c:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\json-language-features\server\dist\node\jsonServerMain" --node-ipc --clientProcessId=22740
0 124 11968 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node D:\_vscode_extensions\ms-python.vscode-pylance-2022.8.50\dist\server.bundle.js --cancellationReceive=file:229790dd21656664e29367f1d6d6db4b50df7ceeb5 --node-ipc --clientProcessId=22740
0 131 23244 gpu-process
20 202 24452 extensionHost
0 78 4640 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node "c:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\json-language-features\server\dist\node\jsonServerMain" --node-ipc --clientProcessId=24452
0 173 17564 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node d:\_vscode_extensions\streetsidesoftware.code-spell-checker-2.7.2\packages\_server\dist\main.js --node-ipc --clientProcessId=24452
0 121 19280 "C:\Users\myuser\AppData\Local\Programs\Microsoft VS Code\Code.exe" --ms-enable-electron-run-as-node D:\_vscode_extensions\ms-python.vscode-pylance-2022.8.50\dist\server.bundle.js --cancellationReceive=file:0af78e962c6e3f07f9e2fb06ea32bb37d6fd8353b8 --node-ipc --clientProcessId=24452
Workspace Stats:
| Window (index.html - WorkSpaceName_1 (Workspace) - Visual Studio Code)
| Window (website_tests.py - WorkSpaceName_2 (Workspace) - Visual Studio Code)
| Window (settings.py - WorkSpaceName_3 - Visual Studio Code)
| Window (admin.py - WorkSpaceName_4 (Workspace) - Visual Studio Code)
| Window (settings.json - WorkSpaceName_5 (Workspace) - Visual Studio Code)
| Folder (snippets): 7 files
| File types: code-snippets(4) json(3)
| Conf files:
| Folder (LocalState): 5 files
| File types: backup(3) json(2)
| Conf files: settings.json(1)
| Folder (.postgres): 2 files
| File types: conf(2)
| Conf files:
| Folder (User): 4879 files
| File types: py(826) json(785) au3(652) html(433) ps1(265) pug(263)
| conf(137) txt(122) js(107) vscdb(102)
| Conf files: settings.json(2)
| Folder (WorkSpaceName_1): 10065 files
| File types: py(1848) pyc(1577) mo(1217) po(1217) html(190) js(182)
| svg(46) css(39) txt(35) exe(26)
| Conf files: settings.json(1)
| Folder (WorkSpaceName_2): 9652 files
| File types: py(1808) pyc(1537) mo(1196) po(1196) html(158) js(87)
| txt(29) svg(26) exe(26) css(16)
| Conf files: settings.json(1)
| Folder (WorkSpaceName_3): 11666 files
| File types: py(1915) pyc(1630) mo(1233) po(1233) js(1067) html(213)
| png(117) css(115) gif(38) txt(37)
| Conf files: settings.json(1)
| Folder (WorkSpaceName_4): 15292 files
| File types: py(2731) pyc(2517) mo(1196) po(1196) pyi(915) png(858)
| json(480) pyd(218) js(200) html(164)
| Conf files: makefile(3) launch.json(1) settings.json(1) package.json(1)
| Launch Configs: python
How I can mitigate this problem (what should I disable in VS Code to prevent Extension Host running this process)? Maybe there is a timer for updating extensions? or something like that. Because I don’t want to close and re-open these Code windows every time.
VS Code version: Code 1.71.0 (784b0177c56c607789f9638da7b6bf3230d47a8c, 2022-09-01T07:36:10.600Z) OS version: Windows_NT x64 10.0.19044 Modes: Sandboxed: No
System Info
| Item | Value |
|---|---|
| CPUs | Intel® Core™ i5-2400 CPU @ 3.10GHz (4 x 3100) |
| GPU Status | 2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled 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 vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off |
| Load (avg) | undefined |
| Memory (System) | 15.95GB (5.85GB free) |
| Process Argv | –crash-reporter-id c64bc5dd-3310-48ba-ac74-660a16150038 |
| Screen Reader | no |
| VM | 0% |
Extensions (24)
| Extension | Author (truncated) | Version |
|---|---|---|
| vscode-m3u | af4 | 1.0.0 |
| vscode-json | and | 1.5.2 |
| vscode-django | bat | 1.10.0 |
| autoit | Dam | 1.0.8 |
| xml | Dot | 2.5.1 |
| gitlens | eam | 12.2.1 |
| vsc-material-theme | Equ | 33.2.0 |
| vsc-material-theme-icons | equ | 1.2.2 |
| prettier-vscode | esb | 9.8.0 |
| unibeautify-vscode | Gla | 0.8.2 |
| rainbow-csv | mec | 2.4.0 |
| git-graph | mhu | 1.30.0 |
| language-gettext | mro | 0.2.0 |
| vscode-language-pack-ru | MS- | 1.71.8310916 |
| python | ms- | 2022.14.0 |
| vscode-pylance | ms- | 2022.8.50 |
| gremlins | nho | 0.26.0 |
| indent-rainbow | ode | 8.3.1 |
| es6-css-minify | olb | 3.3.3 |
| code-spell-checker | str | 2.7.2 |
| code-spell-checker-russian | str | 2.0.6 |
| even-better-toml | tam | 0.18.1 |
| vscode-conventional-commits | viv | 1.24.2 |
| cuesheet | zgm | 0.3.0 |
(1 theme extensions excluded)
About this issue
- Original URL
- State: closed
- Created 2 years ago
- Reactions: 1
- Comments: 28 (10 by maintainers)
@alexdima
I’m using
VSCODE_EXTENSIONSto save space on my system disc, and simply set full path to custom folderD:\_vscode_extensions. That’s I’m using it.It’s worth mention that there were two regular (stable) release (1.72 and 1.73) since my last message. Problem didn’t disappear completely, BUT it became less aggressive: only short (2-4 sec) CPU peak every five minutes and
UNRESPONSIVE extension hostline in Window Log. It’s not ideal, but I get over it 😃Returning to your request…
I deleted
VSCODE_EXTENSIONSand installed Insiders BuildVSCodeUserSetup-x64-1.74.0-insider.exe. I don’t disable anything and open Window Log only.So with this build and without environment variable - issue is GONE. I’m afraid to broke my extensions (or affect stable build), that’s why I didn’t test insiders build with environment variable.
Well, I think I’ll wait stable release of 1.74 and check with
VSCODE_EXTENSIONSagain and add new comment. And I hope after that we can close this issue 🤞🏻Hard to say… There must be something frequently running at high cost. I was fishing for git status refreshes… You can try to profile the extension host.
the same problem