Notebooks - Creating new notebook taking a long time

[claudiaregio]

• VS Code Version: 1.61.0-insider
• OS Version: Windows

I was screen recording for a different reason and a new notebook was taking a long time to open.

Grabbed the logs and it was a bit faster this second time around but still slower than anticipated
Long Notebook Load Time.zip

[DonJayamanne]

Is it fast with screen recording turned off. That's what @tanhakabir reported

[claudiaregio]

It's a little bit faster with screen recording off but not by much, I attached the logs it still took quite a bit longer than I thought it would

[claudiaregio]

slownbcreation.cpuprofile.txt

[rebornix]

Here is what I saw with the new log collected
CPU-20211006T211608.779Z.cpuprofile.txt

@deepak1556 do you find this somehow familiar? I'm not sure if it's simply because the CPU/Disk is busy or node's read file can be blocking.

[claudiaregio]

with Pylance.cpuprofile.txt
without Pylance.cpuprofile.txt

[deepak1556]

Module.require is a blocking operation generally, looking at the attached profiles only read operations from .vscode-insiders/extensions are terribly slow. One of the profiles contain the Module.require for the main application and they are no affected, so this is going based of it.

@rebornix To quick check if something is not wrong at the system level, you can write a simple node script that does a require of the extension files and generate a profile with the following steps,

1) node --prof test-require-vscode-extensions.js
2) The above step on completion will generate a file of the format `isolate-0xnnnnnnnnnnnn-v8.log` in the current directory
3) node --prof-process isolate-0xnnnnnnnnnnnn-v8.log > processed.txt
4) `processed.txt` will now contain the symbolified sample stacks we can inspect

[claudiaregio]

Going to bump this again since I'm still experiencing it during golden scenario run

[roblourens]

This looks like effectively 3.5s to activate the dotnet interactive extension, just to require its file. Does this still happen @claudiaregio? If so we can try the test that deepak suggests