Printenv in shellIntegration-bash.sh cause hang in terminal git bash

[lorenzomathis]

Type: Performance Issue

When i open one terminal with git bash in windows the windows hang for 20/30 second before open totally. After the openig i see the last output of printenv before the prompt.

The row that cause this are in the file shellIntegration-bash.sh, in the function __vsc_update_env . If i delete delete this function and the two call to __vsc_update_env() i dont have any problem anymore.

__vsc_update_env() {
builtin printf '\e]633;EnvSingleStart;%s;\a' $__vsc_nonce
for var in $(compgen -v); do
if printenv "$var" >/dev/null 2>&1; then
value=$(builtin printf '%s' "${!var}")
builtin printf '\e]633;EnvSingleEntry;%s;%s;%s\a' "$var" "$(__vsc_escape_value "$value")" $__vsc_nonce
fi
done
builtin printf '\e]633;EnvSingleEnd;%s;\a' $__vsc_nonce
}

VS Code version: Code - Insiders 1.97.0-insider (d226a2a, 2025-01-22T05:05:14.565Z)
OS version: Windows_NT x64 10.0.19045
Modes:

System Info

Item	Value
CPUs	Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz (32 x 2095)
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 vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	31.92GB (22.24GB free)
Process Argv	--crash-reporter-id cd6f428f-b0f8-40ce-8258-3cb7753136da
Screen Reader	no
VM	0%

Process Info

CPU %	Mem MB	   PID	Process
    0	   133	 17420	code-insiders main
    0	    98	  3756	   gpu-process
    0	    30	  9088	   crashpad-handler
    0	   106	 11568	ptyHost
    0	     7	 13544	     conpty-agent
    0	     6	 24928	     "C:\Program Files\Git\bin\bash.exe" --init-file "c:\SoftwareLight\VS Code Insiders\resources\app/out/vs/workbench/contrib/terminal/common/scripts/shellIntegration-bash.sh"
    0	    12	  3704	       "C:\Program Files\Git\bin\..\usr\bin\bash.exe" --init-file "c:\SoftwareLight\VS Code Insiders\resources\app/out/vs/workbench/contrib/terminal/common/scripts/shellIntegration-bash.sh"
    0	   124	 16500	shared-process
    0	   150	 18544	extensionHost [1]
    0	   100	 11356	     "C:\SoftwareLight\VS Code Insiders\Code - Insiders.exe" "c:\SoftwareLight\VS Code Insiders\resources\app\extensions\json-language-features\server\dist\node\jsonServerMain" --node-ipc --clientProcessId=18544
    0	    46	 19632	   utility-network-service
    0	    99	 20728	fileWatcher [1]
    0	   225	 22436	window [1] (settings.json - gui-nmf (Workspace) - Visual Studio Code - Insiders)

Workspace Info

|  Window (settings.json - gui-nmf (Workspace) - Visual Studio Code - Insiders)
|    Folder (gui-proxy.nmf): 450 files
|      File types: js(129) map(57) css(50) html(50) scss(34) json(17) png(7)
|                  woff(7) woff2(5) svg(5)
|      Conf files: dockerfile(2) package.json(1)
|    Folder (gui-ansible.nmf): 76 files
|      File types: yml(26) j2(13) crt(6) cer(2) key(2) md(2) cfg(1) sh(1)
|      Conf files:
|    Folder (gui.nmf): 556 files
|      File types: scss(177) vue(118) js(82) css(40) json(6) png(5) svg(5)
|                  woff(4) woff2(3) md(2)
|      Conf files: dockerfile(1) package.json(1);

Extensions (9)

Extension	Author (truncated)	Version
vscode-html-css	ecm	2.0.12
beautify	Hoo	1.5.0
rest-client	hum	0.25.1
kubernetes-yaml-formatter	ken	2.4.0
vscode-docker	ms-	1.29.4
vscode-language-pack-it	MS-	1.97.2025012209
vetur	oct	0.37.3
uridecode	sry	0.3.6
JavaScriptSnippets	xab	1.8.0

A/B Experiments

vsliv368:30146709
vspor879:30202332
vspor708:30202333
vspor363:30204092
vsc_aacf:30263846
vscod805cf:30301675
vsaa593cf:30376535
py29gd2263:31024238
c4g48928:30535728
962ge761:30841072
pythonnoceb:30776497
dsvsc014:30777825
dsvsc015:30821418
pythonmypyd1:30859725
h48ei257:31000450
pythontbext0:30879054
cppperfnew:30980852
pythonait:30973460
dvdeprecation:31040973
dwnewjupyter:31046869
2f103344:31071589
nativerepl1:31134653
pythonrstrctxt:31093868
nativeloc1:31118317
cf971741:31144450
e80f6927:31120813
iacca1:31150324
notype1:31143044
dwcopilot:31158714
h409b430:31177054
5b1c1929:31184661
6074i472:31201624
dwoutputs:31217127
6e63a538:31218797
9064b325:31222308
copilot_t_ci:31222730

[anthonykim1]

Thanks for filing this. @lorenzomathis

Does the problem happen in regular bash terminal too? or just gitbash?

I assume it doesnt happen for pwsh on the same machine, is that correct?

Edit: In the meantime I have commented out the relevant code that is causing this delay. Next insider release should be better for you, but I'd love to hear back once I merge in proper fix for this.

[lorenzomathis]

Thanks for response.

I have not tested the normal bash because I only work with git bash even outside of the Visual Studio Code insider program. It is correct that the problem does not occur for pwsh on the same machine.
Thanks for the quick temporary fix.

[anthonykim1]

Hi @lorenzomathis I just wanted to give you an update -

I have made better optimization #238488 but it wouldn't be until mid February before I merge in this code and ask you for another confirmation (your git bash shouldnt get this slow). Thanks!