Running code using the run button in VSC delayed

[FraidOfWater]

Type: Performance Issue

Code executes only after a large delay on the newest version when excecuted from vsc's "run" button.

Diagnostic data

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

Behaviour

The command to run the script isn't inserted into the terminal until after a large delay. This doesn't happen if you manually do ctrl+F5 or F5.

Old perfromance: (v.2024.14.1)

New performance: (The only changed component is that this version is v.2024.16.0.

Steps to reproduce:

1. If you run python code with the python extension v2024.16.0 by pressing the visual studio code run button, there is a severe delay until the program decides to excecute. Downgrading to v2024.14.1 directly solves the issue. This happens on windows.

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: 2024.14.1 (mistake, I reported the bug from the previous version, correct bugged version is 2024.16.0)
VS Code version: Code 1.94.0 (d78a74bcdfad14d5d3b1b782f87255d802b57511, 2024-10-02T13:08:12.626Z)
OS version: Windows_NT x64 10.0.22631
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.12.6
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Global
• Value of the python.languageServer setting: Default

User Settings

languageServer: "Pylance"

Installed Extensions

Extension Name	Extension Id	Version
JavaScript Debugger	ms-vscode.js-debug	1.94.0
JavaScript Debugger Companion Extension	ms-vscode.js-debug-companion	1.1.3
Pylance	ms-python.vscode-pylance	2024.9.1
Python	ms-python.python	2024.14.1
Python Debugger	ms-python.debugpy	2024.10.0
Table Visualizer for JavaScript Profiles	ms-vscode.vscode-js-profile-table	1.0.10

System Info

Item	Value
CPUs	AMD Ryzen 5 5600X 6-Core Processor (12 x 3700)
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)	31.93GB (22.52GB free)
Process Argv	C:\Users\4f736\Desktop\Sourcetest\dev\canvasimage.py --crash-reporter-id 5f987fe4-e9aa-43c0-93ec-dc7ee6464594
Screen Reader	no
VM	0%

Process Info

CPU %	Mem MB	   PID	Process
    0	   129	 15332	code main
    0	   144	  5916	ptyHost
    0	     7	  1908	     conpty-agent
    0	     7	  2084	     conpty-agent
    0	    73	  3100	     C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noexit -command "try { . \"c:\Users\4f736\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\contrib\terminal\common\scripts\shellIntegration.ps1\" } catch {}"
    0	    66	  7140	     C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noexit -command "try { . \"c:\Users\4f736\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\contrib\terminal\common\scripts\shellIntegration.ps1\" } catch {}"
    0	    68	  8348	     C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noexit -command "try { . \"c:\Users\4f736\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\contrib\terminal\common\scripts\shellIntegration.ps1\" } catch {}"
    0	     7	  8680	     conpty-agent
    0	    66	  9280	     C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noexit -command "try { . \"c:\Users\4f736\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\contrib\terminal\common\scripts\shellIntegration.ps1\" } catch {}"
    0	     7	  9656	     conpty-agent
    0	    66	 13576	     C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noexit -command "try { . \"c:\Users\4f736\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\contrib\terminal\common\scripts\shellIntegration.ps1\" } catch {}"
    0	     6	 16600	     conpty-agent
    0	    66	 16620	     C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noexit -command "try { . \"c:\Users\4f736\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\contrib\terminal\common\scripts\shellIntegration.ps1\" } catch {}"
    0	    66	 16840	     C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noexit -command "try { . \"c:\Users\4f736\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\contrib\terminal\common\scripts\shellIntegration.ps1\" } catch {}"
    0	     7	 17056	     conpty-agent
    0	     6	 17332	     conpty-agent
    0	    69	 18072	     C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noexit -command "try { . \"c:\Users\4f736\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\contrib\terminal\common\scripts\shellIntegration.ps1\" } catch {}"
    0	     7	 19256	     conpty-agent
    0	   104	  5936	   window
    0	   123	  6376	shared-process
    0	   134	  7224	   gpu-process
    0	    86	 12752	fileWatcher [1]
    0	   169	 12812	extensionHost [1]
    0	     5	  4868	     c:\Users\4f736\.vscode\extensions\ms-python.python-2024.14.1-win32-x64\python-env-tools\bin\pet.exe server
    0	    10	  6460	       C:\Windows\system32\conhost.exe 0x4
    0	   186	 13788	     electron-nodejs (bundle.js )
    0	   289	 13152	window [1] (Extension: Python - Visual Studio Code)
    0	    31	 16932	   crashpad-handler
    0	    48	 19268	   utility-network-service

Workspace Info

;

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vsliv368:30146709
vspor879:30202332
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vsaa593:30376534
py29gd2263:31024239
vscaat:30438848
c4g48928:30535728
azure-dev_surveyone:30548225
962ge761:30959799
pythongtdpath:30769146
welcomedialogc:30910334
pythonnoceb:30805159
asynctok:30898717
pythonmypyd1:30879173
h48ei257:31000450
pythontbext0:30879054
accentitlementsc:30995553
dsvsc016:30899300
dsvsc017:30899301
dsvsc018:30899302
cppperfnew:31000557
dsvsc020:30976470
pythonait:31006305
dsvsc021:30996838
9c06g630:31013171
a69g1124:31058053
dvdeprecation:31068756
dwnewjupyter:31046869
impr_priority:31102340
nativerepl1:31139838
refactort:31108082
pythonrstrctxt:31112756
flighttreat:31134774
wkspc-onlycs-t:31132770
wkspc-ranged-t:31151552
cf971741:31144450
autoexpandse:31146404
iacca2:31150323
notype1cf:31151524
cc771715:31146322

[karthiknadig]

@anthonykim1 This looks like Shell integration taking too long. If we need to use sendText once, we should just disable shell integration from that point onwards.

[starball5]

Related on Stack Overflow: VS Code 1.94 - Run selection/line in Python terminal very slow

[anthonykim1]

Thanks for filing this @FraidOfWater. I'm looking into resolving this. Could you set your log level to trace and share the logs for Python?

[FraidOfWater]

Hey @anthonykim1 , thanks for replying. Here is my VSC stack trace for python. I hope this is what you meant. It was my mistake for not including it. https://pastebin.com/pxPePWgX

Edit: I seem to have posted the diagnostic data wrong. It says Extension version: 2024.14.1 although It is really 2024.16.0. I must've downgraded and reported it then. I have added corrected diagnostic data at the end.

Edit: Full trace logs here (I figured how to set it as default so it traces when starting up VSC):
Note: here the we are trying to run a simpler program "Hello World!".
https://pastebin.com/TJPx7hP8 Old version
https://pastebin.com/k0zuWMHh New version

I do get this new delay also on another machine.

Note I turn tracing on only after VSC has started with ">Developert:Set Log Level" to trace all
This is what happens with the old version:

2024-10-05 01:33:34.186 [info] Experiment 'pythonRecommendTensorboardExt' is active
2024-10-05 01:33:34.186 [info] Experiment 'pythonTerminalEnvVarActivation' is active
2024-10-05 01:33:34.186 [info] Experiment 'pythonTestAdapter' is active
2024-10-05 01:33:34.186 [info] Python interpreter path: ~\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:33:34.254 [info] > pixi --version
2024-10-05 01:33:34.256 [warning] could not find a pixi interpreter for the interpreter at C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:33:34.286 [warning] could not find a pixi interpreter for the interpreter at C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:33:35.156 [info] Starting Pylance language server.
2024-10-05 01:33:43.890 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:33:46.901 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:33:48.854 [debug] Attempting to run Python file c:\Users\4f736\Desktop\Sourcetest\dev\canvasimage.py
2024-10-05 01:33:48.854 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:33:48.857 [info] CreateEnv Trigger - Workspace not found for c:\Users\4f736\Desktop\Sourcetest\dev\canvasimage.py
2024-10-05 01:33:48.867 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:33:48.869 [debug] Terminal shell path 'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe' identified as shell 'powershell'
2024-10-05 01:33:48.869 [debug] Shell identified as powershell
2024-10-05 01:33:48.969 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:33:48.969 [info] Send text to terminal: & C:/Users/4f736/AppData/Local/Programs/Python/Python312/python.exe c:/Users/4f736/Desktop/Sourcetest/dev/canvasimage.py
2024-10-05 01:33:53.403 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe

This is what happens in the new version:

2024-10-05 01:34:29.033 [info] Experiment 'pythonRecommendTensorboardExt' is active
2024-10-05 01:34:29.033 [info] Experiment 'pythonTerminalEnvVarActivation' is active
2024-10-05 01:34:29.034 [info] Experiment 'pythonTestAdapter' is active
2024-10-05 01:34:29.034 [info] Python interpreter path: ~\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:34:29.363 [info] > pixi --version
2024-10-05 01:34:30.260 [info] Starting Pylance language server.
2024-10-05 01:34:37.681 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:34:40.253 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:34:42.115 [debug] Attempting to run Python file c:\Users\4f736\Desktop\Sourcetest\dev\canvasimage.py
2024-10-05 01:34:42.116 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:34:42.117 [info] CreateEnv Trigger - Workspace not found for c:\Users\4f736\Desktop\Sourcetest\dev\canvasimage.py
2024-10-05 01:34:42.117 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:34:42.118 [debug] Terminal shell path 'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe' identified as shell 'powershell'
2024-10-05 01:34:42.118 [debug] Shell identified as powershell
2024-10-05 01:34:42.224 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
2024-10-05 01:34:45.236 [info] Send text to terminal: & C:/Users/4f736/AppData/Local/Programs/Python/Python312/python.exe c:/Users/4f736/Desktop/Sourcetest/dev/canvasimage.py
2024-10-05 01:34:45.236 [debug] Shell Integration is disabled, sendText: & C:/Users/4f736/AppData/Local/Programs/Python/Python312/python.exe c:/Users/4f736/Desktop/Sourcetest/dev/canvasimage.py
2024-10-05 01:34:47.247 [debug] Found cached env for C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe

It looks like the lines from the old version:

[warning] could not find a pixi interpreter for the interpreter at C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe
[warning] could not find a pixi interpreter for the interpreter at C:\Users\4f736\AppData\Local\Programs\Python\Python312\python.exe

and the lines from the new version:

2024-10-05 01:34:29.033 [info] Experiment 'pythonRecommendTensorboardExt' is active
2024-10-05 01:34:45.236 [debug] Shell Integration is disabled, sendText: & C:/Users/4f736/AppData/Local/Programs/Python/Python312/python.exe c:/Users/4f736/Desktop/Sourcetest/dev/canvasimage.py

don't match

for repeated pressing, I seem to get this as the only difference:

2024-10-05 01:34:45.236 [debug] Shell Integration is disabled, sendText: & C:/Users/4f736/AppData/Local/Programs/Python/Python312/python.exe c:/Users/4f736/Desktop/Sourcetest/dev/canvasimage.py

Also I do not know the significance of this, but for both versions I do get this error next to the terminal

Correct diagnostic data:
Note: I have added extensions to run java, sorry for that. I don't think there are any other changes to this data.

Extension version: 2024.16.0
VS Code version: Code 1.94.0 (d78a74bcdfad14d5d3b1b782f87255d802b57511, 2024-10-02T13:08:12.626Z)
OS version: Windows_NT x64 10.0.22631
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.12.6
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Global
• Value of the python.languageServer setting: Pylance

User Settings

languageServer: "Pylance"

Installed Extensions

Extension Name	Extension Id	Version
Debugger for Java	vscjava.vscode-java-debug	0.58.0
Extension Pack for Java	vscjava.vscode-java-pack	0.29.0
Gradle for Java	vscjava.vscode-gradle	3.16.4
IntelliCode	VisualStudioExptTeam.vscodeintellicode	1.3.1
IntelliCode API Usage Examples	VisualStudioExptTeam.intellicode-api-usage-examples	0.2.8
Java	Oracle.oracle-java	22.1.2
JavaScript Debugger	ms-vscode.js-debug	1.94.0
JavaScript Debugger Companion Extension	ms-vscode.js-debug-companion	1.1.3
Language Support for Java(TM) by Red Hat	redhat.java	1.35.1
Maven for Java	vscjava.vscode-maven	0.44.0
Project Manager for Java	vscjava.vscode-java-dependency	0.24.0
Pylance	ms-python.vscode-pylance	2024.9.2
Python	ms-python.python	2024.16.0
Python Debugger	ms-python.debugpy	2024.10.0
Table Visualizer for JavaScript Profiles	ms-vscode.vscode-js-profile-table	1.0.10
Test Runner for Java	vscjava.vscode-java-test	0.42.0

System Info

Item	Value
CPUs	AMD Ryzen 5 5600X 6-Core Processor (12 x 3700)
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)	31.93GB (20.73GB free)
Process Argv	--log trace --crash-reporter-id 5f987fe4-e9aa-43c0-93ec-dc7ee6464594
Screen Reader	no
VM	0%

A/B Experiments

vsliv368:30146709
vspor879:30202332
vspor708:30202333
vspor363:30204092
vscod805:30301674
binariesv615:30325510
vsaa593:30376534
py29gd2263:31024239
vscaat:30438848
c4g48928:30535728
azure-dev_surveyone:30548225
962ge761:30959799
pythongtdpath:30769146
welcomedialogc:30910334
pythonnoceb:30805159
asynctok:30898717
pythonmypyd1:30879173
h48ei257:31000450
pythontbext0:30879054
accentitlementsc:30995553
dsvsc016:30899300
dsvsc017:30899301
dsvsc018:30899302
cppperfnew:31000557
dsvsc020:30976470
pythonait:31006305
dsvsc021:30996838
9c06g630:31013171
a69g1124:31058053
dvdeprecation:31068756
dwnewjupyter:31046869
impr_priority:31102340
nativerepl1:31139838
refactort:31108082
pythonrstrctxt:31112756
flighttreat:31134774
wkspc-onlycs-t:31132770
wkspc-ranged-t:31151552
cf971741:31144450
autoexpandse:31146404
iacca2:31150323
notype1cf:31151524
cc771715:31146322

[anthonykim1]

Could you try the latest pre-release version of Python extension? This would've gotten better with #24248

Let me know if you have any complains. Thanks!