Extension Host is unresponsive after some minutes of using.

[jonathanschein]

• Extension Name: python
• Extension Version: 2018.9.0
• OS Version: Windows_NT x64 10.0.17134
• VSCode version: 1.28.0

{
   "activationTimes": {
   	"startup": false,
   	"codeLoadingTime": 1725,
   	"activateCallTime": 177,
   	"activateResolvedTime": 514,
   	"activationEvent": "onLanguage:python"
   }
}

[DonJayamanne]

Please could you provide the following information,

- Python version (& distribution if applicable, e.g. Anaconda): XXX
- Type of virtual environment used (N/A | venv | virtualenv | conda | ...): XXX 

[brettcannon]

Also let us know if you are using Jedi or the language server and whether the language server was being downloaded or extracted at the time?

[DonJayamanne]

@essanpupil

• are using Jedi or the language server
• are you able replicate this issue consistently (i.e. loading vscode and opening a python file)

@jonathanschein @essanpupil

• What other extensions do you have installed?
  • Use the command Help: Report Issue
  • Click on Preview on GitHub
  • Copy the list of extensions and paste it in here.

[essanpupil]

1. I do not use jedi or language server
2. I can replicate this, on and off virtualenv
3. This is my list of extension:
   • DavidAnson.vscode-markdownlint
   • DmitryDorofeev.empty-indent
   • eamodio.gitlens
   • felixfbecker.php-intellisense
   • formulahendry.code-runner
   • ms-python.python
   • oderwat.indent-rainbow
   • PeterJausovec.vscode-docker
   • yzhang.markdown-all-in-one
4. Python version: Python 3.6.6
5. Windows:
   • Windows 10 pro 64bit
   • Version 1809
   • OS Build: 17763.1

I hope that helps, if there's anything i could do to help, please inform me.

[jonathanschein]

Python version: 3.6.3
I'm using virtualenv

Extension	Author (truncated)	Version
EditorConfig	Edi	0.12.4
tslint	eg2	1.0.40
dotnet-test-explorer	for	0.5.4
sass-lint	gle	1.0.3
vscode-flake8	jay	0.0.4
csharpextensions	jch	1.3.0
docomment	k--	0.1.2
Angular-BeastCode	Mik	6.2.32
python	ms-	2018.9.0
csharp	ms-	1.16.2
debugger-for-chrome	msj	4.10.2
gitblame	wad	2.4.4

Thanks

[DonJayamanne]

@jonathanschein @essanpupil @Sanyorke-Han

Looking at the logs you have provided, the only one that stands out is the one provided by @essanpupil

Looking at the logs, it seems the extension is ready for use within < 2secs for @jonathanschein @Sanyorke-Han . I.e. I don't see how the extension could cause the extension host from being unresoponsive.

There could be other extensions that are causing the delays (@essanpupil is an exception, hence the request to retry - see further below).

Please do have a look at https://code.visualstudio.com/updates/v1_28#_extension-host-unresponsive

• Based on the comments, the Python extension takes < 2 seconds, and not 10, hence the Python Extension can't the causing this.

Finally, please could you try exiting VS Code, reloading it and a Python file. After around 1 minute, please could you capture the perf metrics (for all extensions) once again and dump them here.

• Open command palette
• Select the command Developer Startup Performance
• From the developer window, please take a screenshot of the Extension Activation Stats

[jonathanschein]

Done

[thernstig]

I ended up here after searching some about the new "extension host unresponsive." I experience this when starting VS code though. Here are all the details.

• Extension Name: python
• Extension Version: 2018.9.0
• OS Version: Windows_NT x64 10.0.17134
• VSCode version: 1.28.0

We have written the needed data into your clipboard. Please paste:

{
	"activationTimes": {
		"startup": false,
		"codeLoadingTime": 15081,
		"activateCallTime": 504,
		"activateResolvedTime": 52,
		"activationEvent": "onLanguage:python"
	}
}

Additional info:

• Python 3.6.1
• pipenv version 2018.7.1
• "python.jediEnabled": true, (which I assume means I am not using your own language server, right?)

VS Code version: Code 1.28.0 (431ef9da3cf88a7e164f9d33bf62695e07c6c2a9, 2018-10-05T14:58:53.203Z)
OS version: Windows_NT x64 10.0.17134

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-4200U CPU @ 1.60GHz (4 x 2295)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: enabled video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled
Memory (System)	7.91GB (2.88GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions (9)

Extension	Author (truncated)	Version
vscode-markdownlint	Dav	0.20.0
vscode-eslint	dba	1.6.0
gitlens	eam	8.5.6
ftp-sync	luk	0.3.3
python	ms-	2018.9.0
Go	ms-	0.6.90
debugger-for-chrome	msj	4.10.2
vscode-docker	Pet	0.3.1
code-settings-sync	Sha	3.1.2

[DonJayamanne]

@omartin2010

Please provide the following info:

- VS Code version: XXX
- Extension version (available under the Extensions sidebar): XXX
- OS and version: XXX
- Python version (& distribution if applicable, e.g. Anaconda): XXX
- Type of virtual environment used (N/A | venv | virtualenv | conda | ...): XXX 

Next:
Please could you reload vscode and capture the metrics once again.
Instructions:
Please could you try exiting VS Code, reloading it and a Python file. After around 1 minute, please could you capture the perf metrics (for all extensions) once again and dump them here.

• Open command palette
• Select the command Developer Startup Performance
• From the developer window, please take a screenshot of the Extension Activation Stats

[DonJayamanne]

@thernstig
The extension attempts to locate python interpreters upon loading the extension, that list is cached and for subsequent loads of VSC the cached list is used.

Please provide the following info:

- VS Code version: XXX
- Extension version (available under the Extensions sidebar): XXX
- OS and version: XXX
- Python version (& distribution if applicable, e.g. Anaconda): XXX
- Type of virtual environment used (N/A | venv | virtualenv | conda | ...): XXX 

Next:
Please could you try exiting VS Code, reloading it and a Python file. After around 1 minute, please could you capture the perf metrics (for all extensions) once again and dump them here.

• Open command palette
• Select the command Developer Startup Performance
• From the developer window, please take a screenshot of the Extension Activation Stats

[DonJayamanne]

@korpjack

Please provide the following info:

- VS Code version: XXX
- Extension version (available under the Extensions sidebar): XXX
- OS and version: XXX
- Python version (& distribution if applicable, e.g. Anaconda): XXX
- Type of virtual environment used (N/A | venv | virtualenv | conda | ...): XXX 

Next:
Please could you try exiting VS Code, reloading it and a Python file. After around 1 minute, please could you capture the perf metrics (for all extensions) once again and dump them here.

Open command palette
Select the command Developer Startup Performance
From the developer window, please take a screenshot of the Extension Activation Stats

[DonJayamanne]

Reported by @stolencatkarma

Extension Name: python
Extension Version: 2018.9.0
OS Version: Windows_NT x64 10.0.17134
VSCode version: 1.28.0

{
	"activationTimes": {
		"startup": false,
		"codeLoadingTime": 19889,
		"activateCallTime": 271,
		"activateResolvedTime": 71,
		"activationEvent": "onLanguage:python"
	}
}

@stolencatkarma

Please provide the following info:

- VS Code version: XXX
- Extension version (available under the Extensions sidebar): XXX
- OS and version: XXX
- Python version (& distribution if applicable, e.g. Anaconda): XXX
- Type of virtual environment used (N/A | venv | virtualenv | conda | ...): XXX 

Next:
Please could you try exiting VS Code, reloading it and a Python file. After around 1 minute, please could you capture the perf metrics (for all extensions) once again and dump them here.

• Open command palette
• Select the command Developer Startup Performance
• From the developer window, please take a screenshot of the Extension Activation Stats

[brettcannon]

Part of #2853