intermittently notebooks are taking long time to load after installing jupyter-server-nbmodel extensions.

[abhijeetgurle-dream11]

Description

I have recently installed jupyter-server-nbmodel extension on my jupyterlab setup. After installing it, notebooks are taking long time to load even on my local. It took around 4.5min to load a simple notebook with 6KB data. I have observed that the issue happens with older notebooks and not the notebooks which are created after the extension is installed.

Reproduce

1. Install jupyter-server-nbmodel
2. Open multiple notebooks and see how much time it takes to load the notebook

Expected behavior

The notebook should open normally as it would open without the extension.

Context

• Datalayer version: Jupyterlab 4.3.0
• Operating System and version: MacOS Sonoma
• Browser and version: 4.3.0

Browser Output

Paste the output from your browser Javascript console here.

[fcollonval]

Maybe related to jupyterlab/jupyter-collaboration#398

[abhijeetgurle-dream11]

The root cause of the mentioned issue and my current issue can be same, but I resolved that issue by upgrading the jupyter version and I started getting the current issue.

[abhijeetgurle-dream11]

Hey @fcollonval, anything that we can do to resolve the issue? We want to use this extension in our prod setup and blocked becuase we are facing this issue.

[abhijeetgurle-dream11]

This issue is resolved now, just install jupyter_ydoc >= 3.0.2