Severe stuttering and high memory footprint

[Plankzzz]

Type: Performance Issue

After opening vscode, open python editor, not only syntax highlights can not be displayed correctly, especially in the formatter (using black-formatter) serious card, and occupy a large memory.

Extension version: 2026.4.0
VS Code version: Code 1.112.0 (07ff9d6178ede9a1bd12ad3399074d726ebe6e43, 2026-03-17T18:09:23Z)
OS version: Windows_NT x64 10.0.26200
Modes:

System Info

Item	Value
CPUs	AMD Ryzen 7 8745H w/ Radeon 780M Graphics (16 x 3793)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x1002, DEVICE=0x1900 [AMD Radeon 780M Graphics], DRIVER_VENDOR=AMD, DRIVER_VERSION=32.0.23033.1002 ACTIVE GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.7309 Machine model name: Machine model version: 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 trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	29.79GB (17.94GB free)
Process Argv	--crash-reporter-id 45094783-7611-47d6-b0d9-09424db0c020
Screen Reader	yes
VM	50%

Process Info

CPU %	Mem MB	   PID	Process
    1	   207	 23032	code
    0	     9	  2664	   utility-process
   16	  3996	  3112	extension-host [1]
    0	     6	  1764	     c:\Users\Plank-mini\AppData\Local\Programs\Python\Python313\python.exe c:\Users\Plank-mini\.vscode\extensions\ms-python.black-formatter-2025.2.0\bundled\tool\lsp_server.py --stdio
    0	     1	 23172	       C:\Windows\system32\conhost.exe 0x4
    0	     4	  8640	     c:\Users\Plank-mini\.vscode\extensions\ms-python.python-2026.4.0-win32-x64\python-env-tools\bin\pet.exe server
    0	     1	 26816	       C:\Windows\system32\conhost.exe 0x4
    0	    32	 18012	     "C:\Users\Plank-mini\AppData\Local\Programs\Microsoft VS Code\Code.exe" "c:\Users\Plank-mini\AppData\Local\Programs\Microsoft VS Code\07ff9d6178\resources\app\extensions\json-language-features\server\dist\node\jsonServerMain" --node-ipc --clientProcessId=3112
    0	    42	 24612	     electron-nodejs (bundle.js)
    0	     2	 26128	     c:\Users\Plank-mini\.vscode\extensions\ms-python.vscode-python-envs-1.22.0-win32-x64\python-env-tools\bin\pet.exe server
    0	     1	  6620	       C:\Windows\system32\conhost.exe 0x4
    0	    16	  9084	   utility-network-service
    0	    82	 15492	   gpu-process
    1	   450	 21156	pty-host
    6	    29	  4744	     C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noexit -command "try { . \"c:\Users\Plank-mini\AppData\Local\Programs\Microsoft VS Code\07ff9d6178\resources\app\out\vs\workbench\contrib\terminal\common\scripts\shellIntegration.ps1\" } catch {}"
    0	    11	  4988	     conpty-agent
    0	    85	  5232	     C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -NoProfile
    1	     2	 21568	     conpty-agent
    7	  1296	 23264	window [1] (正在运行的扩展 - RogueLike - Visual Studio Code)
    0	     3	 23848	   crashpad-handler
    0	    29	 26180	file-watcher [1]
    0	    91	 27964	shared-process

Workspace Info

|  Window (正在运行的扩展 - RogueLike - Visual Studio Code)
|    Folder (RogueLike): 2725 files
|      File types: py(871) pyc(869) pyi(264) f90(61) h(37) csv(30) txt(29)
|                  f(24) lib(21) pyd(21)
|      Conf files: launch.json(1) settings.json(1)
|      Launch Configs: debugpy(2);

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