High CPU usage & temporary terminal hang with tab completion

[aaronzott]

Type: Performance Issue

With powershell extension enabled, tab completion does not show any options, and as soon as I hit tab, I get high CPU usage and the terminal hangs for 1 minute or more. VSCode process explorer shows pty-host as the offending process. If I disable powershell extension, intellisense/tab completion works fine, no hangs. Used extension bisect to determine this extension as the issue.

Extension version: 2025.4.0
VS Code version: Code 1.107.0 (618725e67565b290ba4da6fe2d29f8fa1d4e3622, 2025-12-10T07:43:47.883Z)
OS version: Darwin arm64 25.2.0
Modes:

System Info

Item	Value
CPUs	Apple M1 Pro (10 x 2400)
GPU Status	2d_canvas: enabled 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 webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	1, 3, 3
Memory (System)	16.00GB (0.09GB free)
Process Argv	--crash-reporter-id 368e9091-3110-4791-8417-6e8a7d7c1519
Screen Reader	no
VM	0%

Process Info

CPU %	Mem MB	   PID	Process
   12	47850746041	  8291	code
    5	19703248370	  8294	   gpu-process
    0	8444249301	  8295	   utility-network-service
    3	75998243712	  8297	window [1] (_snippets.ps1 — git)
    1	14073748836	  8310	pty-host
    0	28147497671	  8325	     /usr/local/bin/pwsh -noexit -command . "/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/contrib/terminal/common/scripts/shellIntegration.ps1"
    3	47850746041	  9045	     /usr/local/bin/pwsh -Login -NoProfile -EncodedCommand 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
    1	28147497671	  8312	shared-process
    0	     0	  9056	     /bin/ps -ax -o pid=,ppid=,pcpu=,pmem=,command=
    0	30962247438	  8910	extension-host [1]
    0	14073748836	  8911	file-watcher [1]

Workspace Info

|  Window (_snippets.ps1 — git)
|    Folder (git): 1661 files
|      File types: ps1(960) txt(254) vbs(69) csv(39) jpg(38) bat(37) xml(30)
|                  psd1(20) psm1(19) aspx(9)
|      Conf files:;