Activating environment takes a few seconds

[cbrnr]

Type: Bug

Behaviour

Activating a venv when opening a terminal takes 3-4 seconds. Previously, it used to be pretty much instantaneous. Even worse, while the env is being activated, I can already run commands, which eventually will error because they require the activated env.

Steps to reproduce:

1. Open the integrated terminal
2. Observe the "Activating venv" message in the toolbar
3. This takes a few seconds
4. After that, the venv is finally activated

Extension version: 2026.5.2026070801
VS Code version: Code 1.130.0 (Universal) (1b6a188127eeaf9194f945eb6eb89a657e93c54c, 2026-07-22T14:55:04Z)
OS version: Darwin arm64 25.5.0
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.14.5
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Venv
• Value of the python.languageServer setting: None

User Settings

languageServer: "None"

testing
• pytestArgs: "<placeholder>"
• pytestEnabled: true

Installed Extensions

Extension Name	Extension Id	Version
air-vscode	Pos	0.28.0
claude-code	Ant	2.1.220
code-spell-checker	str	4.5.6
code-spell-checker-german	str	2.3.4
copilot-chat	Git	0.58.0
debugpy	ms-	2026.7.12081007
js-debug	ms-	1.117.0
js-debug-companion	ms-	1.1.3
jsts-chat-features	Typ	0.0.4
jupyter	ms-	2025.9.1
python	ms-	2026.5.2026070801
quarto	qua	1.135.0
rainbow-csv	mec	3.24.1
rewrap-revived	dnu	1.16.3
ruff	cha	2026.66.0
ty	ast	2026.64.0
vscode-js-profile-table	ms-	1.0.10
vscode-pull-request-github	Git	0.160.0
vscode-python-envs	ms-	1.36.0
vscode-yaml	red	1.24.0

System Info

Item	Value
CPUs	Apple M2 Pro (12 x 2400)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x106b [Google Inc. (Apple)], DEVICE=0x0000 [ANGLE (Apple, ANGLE Metal Renderer: Apple M2 Pro, Version 26.5.2 (Build 25F84))], DRIVER_VENDOR=Apple, DRIVER_VERSION=26.5.2 ACTIVE Machine model name: Mac Machine model version: 14.9 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: enabled_on trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgpu: enabled webnn: disabled_off
Load (avg)	2, 2, 2
Memory (System)	32.00GB (0.09GB free)
Process Argv
Screen Reader	no
VM	0%