High CPU usage

Type: Performance Issue

Behaviour

CPU usage should be minimal. Ideally less than 5%.

These pyenv-which and pyenv-exec processes are spawned as soon as VSCode is opened. Takes a few minutes before they start hitting 100%. They also never terminate when you completely close VSCode. Manually terminating the processes then restarting VSCode will do the same thing over again.

Steps to reproduce:

Open VSCode
Open a Python project or two
Make sure the Python extension is enabled
Wait about 5 minutes for your CPU to be pegged
Kill VSCode, observe the pyenv-exec processes with ms-python.vscode-pylance in the -I argument
Reopen VSCode and now more of the same processes are running, but CPU is completely pegged

Diagnostic data

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

XXX

Extension version: 2024.13.2024080701
VS Code version: Code 1.92.0 (b1c0a14de1414fcdaa400695b4db1c0799bc3124, 2024-07-31T23:26:45.634Z)
OS version: Darwin arm64 23.6.0
Modes:

Python version (& distribution if applicable, e.g. Anaconda): 3.8.19
Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Poetry
Value of the python.languageServer setting: Default

User Settings


languageServer: "Pylance"

experiments
• enabled: false

Installed Extensions

Extension Name	Extension Id	Version
autoDocstring - Python Docstring Generator	njpwerner.autodocstring	0.6.1
Better Jinja	samuelcolvin.jinjahtml	0.20.0
Django Support	almahdi.code-django	0.5.4
ES7+ React/Redux/React-Native snippets	dsznajder.es7-react-js-snippets	4.4.3
Even Better TOML	tamasfe.even-better-toml	0.19.2
GitHub Actions	github.vscode-github-actions	0.26.3
GitHub Copilot	GitHub.copilot	1.220.1035
GitHub Copilot Chat	GitHub.copilot-chat	0.18.1
GitHub Pull Requests	GitHub.vscode-pull-request-github	0.95.2024080708
GitHub Theme	GitHub.github-vscode-theme	6.3.4
GitLens — Git supercharged	eamodio.gitlens	15.2.3
Go	golang.go	0.42.0
Go Template Support	jinliming2.vscode-go-template	0.2.1
HashiCorp HCL	hashicorp.hcl	0.5.0
HashiCorp Terraform	hashicorp.terraform	2.33.2024073012
IntelliCode	VisualStudioExptTeam.vscodeintellicode	1.3.1
JavaScript Debugger	ms-vscode.js-debug	1.92.0
JavaScript Debugger Companion Extension	ms-vscode.js-debug-companion	1.1.3
Kubernetes	ms-kubernetes-tools.vscode-kubernetes-tools	1.3.16
Live Share	ms-vsliveshare.vsliveshare	1.0.5936
Markdown Preview Mermaid Support	bierner.markdown-mermaid	1.23.1
Material Icon Theme	PKief.material-icon-theme	5.8.0
Modelines	chrislajoie.vscode-modelines	2.0.6
Moonlight	atomiks.moonlight	0.11.1
One Dark Pro	zhuangtongfa.material-theme	3.17.2
Packer	4ops.packer	0.3.0
Prettier - Code formatter	esbenp.prettier-vscode	10.4.0
Pylance	ms-python.vscode-pylance	2024.8.1
Python	ms-python.python	2024.13.2024080701
Python Debugger	ms-python.debugpy	2024.10.0
Table Visualizer for JavaScript Profiles	ms-vscode.vscode-js-profile-table	1.0.9
Tailwind CSS IntelliSense	bradlc.vscode-tailwindcss	0.12.5
vscode-proto3	zxh404.vscode-proto3	0.5.5
vscode-styled-components	styled-components.vscode-styled-components	1.7.8
YAML	redhat.vscode-yaml	1.15.0

System Info

Item	Value
CPUs	Apple M1 Max (10 x 2400)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on 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_graphite: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	10, 9, 9
Memory (System)	32.00GB (0.20GB free)
Process Argv
Screen Reader	no
VM	0%

Process Info

CPU %	Mem MB	   PID	Process
    3	   164	 79220	code main
    0	    66	 79221	   gpu-process
    0	    33	 79222	   utility-network-service
    0	   262	 79223	window [1] (metrics.py — beam-client)
    0	   229	 79224	window [2] (app.py — beta9)
    0	    66	 79348	ptyHost
    0	     0	 79354	     /bin/zsh -il
    0	     0	 79427	     /bin/zsh -i
    0	     0	 79492	     /bin/zsh -i
    1	    98	 79349	shared-process
    0	    66	 79350	fileWatcher [2]
    0	    66	 79351	fileWatcher [1]
    0	   131	 79352	extensionHost [1]
    0	     0	 79417	     /Users/npetrovic/.vscode/extensions/ms-python.python-2024.13.2024080701-darwin-arm64/python-env-tools/bin/pet server
    0	     0	 79444	       bash /Users/npetrovic/.pyenv/libexec/pyenv-exec python -c import json, sys; print('093385e9-59f7-4a16-a604-14bf206256fe');print(json.dumps({'version': '.'.join(str(n) for n in sys.version_info), 'sys_prefix': sys.prefix, 'executable': sys.executable, 'is64_bit': sys.maxsize > 2**32}))
    0	    33	 80132	     /Applications/Visual Studio Code.app/Contents/Frameworks/Code Helper (Plugin).app/Contents/MacOS/Code Helper (Plugin) /Applications/Visual Studio Code.app/Contents/Resources/app/extensions/json-language-features/server/dist/node/jsonServerMain --node-ipc --clientProcessId=79352
    0	    66	 80574	     electron-nodejs (bundle.js )
    0	     0	 81170	       bash /Users/npetrovic/.pyenv/libexec/pyenv-exec python3 -I /Users/npetrovic/.vscode/extensions/ms-python.vscode-pylance-2024.8.1/dist/bundled/files/get_pytest_options.py
    0	     0	 81177	       bash /Users/npetrovic/.pyenv/libexec/pyenv-exec python3 -I /Users/npetrovic/.vscode/extensions/ms-python.vscode-pylance-2024.8.1/dist/bundled/files/get_pytest_options.py
    0	    33	 81061	     electron-nodejs (server-node.js )
    0	    33	 82170	     electron-nodejs (tailwindServer.js )
    0	    98	 79353	extensionHost [2]
    0	     0	 79416	     /Users/npetrovic/.vscode/extensions/ms-python.python-2024.13.2024080701-darwin-arm64/python-env-tools/bin/pet server
    0	     0	 79445	       bash /Users/npetrovic/.pyenv/libexec/pyenv-exec python -c import json, sys; print('093385e9-59f7-4a16-a604-14bf206256fe');print(json.dumps({'version': '.'.join(str(n) for n in sys.version_info), 'sys_prefix': sys.prefix, 'executable': sys.executable, 'is64_bit': sys.maxsize > 2**32}))
    0	    33	 80076	     /Applications/Visual Studio Code.app/Contents/Frameworks/Code Helper (Plugin).app/Contents/MacOS/Code Helper (Plugin) /Applications/Visual Studio Code.app/Contents/Resources/app/extensions/json-language-features/server/dist/node/jsonServerMain --node-ipc --clientProcessId=79353
    0	     0	 80395	     /Users/npetrovic/.vscode/extensions/hashicorp.terraform-2.33.2024073012-darwin-arm64/bin/terraform-ls serve
    0	    66	 80530	     electron-nodejs (bundle.js )
    0	     0	 81185	       bash /Users/npetrovic/.pyenv/libexec/pyenv-exec python3 -I /Users/npetrovic/.vscode/extensions/ms-python.vscode-pylance-2024.8.1/dist/bundled/files/get_pytest_options.py
    0	     0	 81193	       bash /Users/npetrovic/.pyenv/libexec/pyenv-exec python3 -I /Users/npetrovic/.vscode/extensions/ms-python.vscode-pylance-2024.8.1/dist/bundled/files/get_pytest_options.py
    0	    33	 82521	     electron-nodejs (server-node.js )

Screen shots

VSCode running

VSCode closed/quit

Process explorer capturing the high CPU

Things tried

Completely removed pyenv and deleted the ~/.pyenv directory.
Tried an older version of pyenv (v2.3.21)
Wiped out my .venv directories for my projects and reinstalled with poetry
Disabled the Python extension in VSCode, resolves the issue, but then there's no Python support
Disabled the Python Debugger, isort, and Ruff extensions in VSCode
Disabled the Pylance extension, this looks like it resolves it, but after having VSCode open for about 5 minutes, htop shows pyenv-which is still hitting 100% at least every other second, but the process is no where to be found in the process explorer.
Confirmed that pyenv-which pyenv-exec processes continue to spawn as long as VSCode is opened.
Set the Python: Language Server setting to None, issue still happens
This looks identical to this issue on python-environment-tools - High CPU usages python-environment-tools#134

nickpetrovic

nickpetrovic is this with particular pyenv environment or just anything in general? Could you share the logs from Output > Python?

If I remove pyenv entirely, it goes away. Doesn't matter which python project I open up. (See my "Things tried" section.

In my screenshots section, you can see the parent process of pyenv-which is /Users/npetrovic/.vscode/extensions/ms-python.python-2024.13.2024080901-darwin-arm64/python-env-tools/bin/pet server.

Here are the logs you asked for.

Details

2024-08-09 14:22:33.537 [error] Reading directory to watch failed [Error: ENOENT: no such file or directory, scandir '/Users/npetrovic/Projects/beam-client/.pixi/envs'
	at Object.readdirSync (node:fs:1509:26)
	at t.readdirSync (node:electron/js2c/node_init:2:11418)
	at /Users/npetrovic/.vscode/extensions/ms-python.python-2024.13.2024080901-darwin-arm64/out/client/extension.js:2:583006
	at /Users/npetrovic/.vscode/extensions/ms-python.python-2024.13.2024080901-darwin-arm64/out/client/extension.js:2:583197
	at Array.map (<anonymous>)
	at d.initWatchers (/Users/npetrovic/.vscode/extensions/ms-python.python-2024.13.2024080901-darwin-arm64/out/client/extension.js:2:582915)
	at async d.ensureWatchersReady (/Users/npetrovic/.vscode/extensions/ms-python.python-2024.13.2024080901-darwin-arm64/out/client/extension.js:2:539326)] {
  errno: -2,
  code: 'ENOENT',
  syscall: 'scandir',
  path: '/Users/npetrovic/Projects/beam-client/.pixi/envs'
}
2024-08-09 14:22:33.537 [error] Dir "/Users/npetrovic/Projects/beam-client/.pixi/envs" is not watchable (directory does not exist)
2024-08-09 14:22:33.571 [info] Default formatter is set to charliermarsh.ruff for workspace /Users/npetrovic/Projects/beam-client
2024-08-09 14:22:33.580 [info] Python interpreter path: ./.venv/bin/python
2024-08-09 14:22:33.728 [info] > ~/.pyenv/bin/pyenv which python
2024-08-09 14:22:33.728 [info] cwd: .
2024-08-09 14:22:34.669 [info] Starting Pylance language server.

I think I have the same issue when I'm working remote with my Raspberry Pi. The CPU overload goes that high, that the SSH connection breaks and I can not reconnect.

This (specifically the pixi error) should get addressed by #23937 . Try the latest pre-release.

Duplicate of #23906

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High CPU usage #23921

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High CPU usage #23921

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karthiknadig commented on Aug 9, 2024

nickpetrovic commented on Aug 9, 2024

reserschnell commented on Aug 16, 2024

karthiknadig commented on Aug 16, 2024

karthiknadig commented on Aug 16, 2024

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