The loading speed is too slow when opening the page for the first time

[nslqd1239]

Description

We tried to install jupyterlab in a container for users to use, but found that when opening the jupyter page for the first time, a lot of front-end resources need to be loaded, which takes a lot of time to complete the page loading, about 25 seconds. Of course, this also depends on my wifi speed not being fast enough, but I have also tested it in a good network environment, and it is still much slower than opening a regular website.

I have tried some methods, but they have not been effective in solving:

1. Removed custom plugins
2. Adjusted the system configuration of jupyterlab (although my understanding may not be comprehensive enough)
3. Attempted Jupyter Hub

May I ask if there are any configuration options that can prevent unnecessary front-end resources from loading when first opened, or change unused resources to lazy loading, or support pulling these front-end resources from specified CDNs to improve speed.

Hope you can help answer, thank you!

Context

• Operating System and version: Ubuntu22.04
• Browser and version: 131.0.6778.266
• JupyterLab version: 4.0.0

[RRosio]

Thank you for opening this issue @nslqd1239! This has been reported previously, so I will close this issue as a duplicate of open issues such as: #14124, and #5862. Let's continue the discussion one of those existing issues!

As an additional note, per triage: @krassowski points out that there have been some improvements that do not solve the issue entirely but do improve the situation for performance since JupyterLab 4.0.0 (for example: #15334). Please feel free to try the latest version out!