I’ve used JupyterLab off and on for the past couple years and heavily in the last couple weeks. I’ve noticed performance issues during this time which have brought me to a crossroads, where I am trying to decide whether to continue investing in this platform or whether I should look into other optio…

THANK YOU SO MUCH !!! A simple pip install jupyter_client==7.0.6 solved it for me

I have been using JupyterLab since it first became available. Occasionally I experienced slowness problems in the past. Lately, since version 3.x was introduced, I have not really experienced any significant slowness problems. I experienced problems with GCP, Azure, and other cloud platforms, so …

With all the latest jupyter and jupyterlab packages installed and a clean python environment, I can confirm that the jupyterlab UI becomes very slow if Show Contextual Help window is opened. The issue also depends on the type of text/variable/function one types in the code cell; here are my observa…

Slow UI in 2022 after updating… dont know why…

I can confirm that reverting back to jupyter_client==7.0.6 solves the issue of having a cripplingly slow JupyterLab UI when several notebooks with large cell counts are open. Would be great to see this issue fixed at some point.

[image] Julabuser: Show Contextual Help thanks:) Hope it can fixed soon…

Painfully slow here; on both Chrome and Safari. Safari actually is worse and many NBExtensions won’t even work. Happened right after an OS upgrade was forced on me by corporate IT to MacOS Monterey 12.4. Tried downgrading; no change. Am not using Contextual Help.

From my observation upgrading to 3.4.xx above seems to introduce UI lagging issues, including delayed feedback when mouse hovering over any UI elements (including menu items, files on the folder browser, etc). Downgrading to 3.3.x (3.3.4 for my case) seems to remove the problem, at least on my setup…

Hello, please help. I have this issue for a long time and the lagging is really bad. I had version of 3.3.2 and lagging was still really bad for a big file. Now I upgrade it to 3.4.4 and it is still really bad lagging. I don’t have context help enabled. so could you please do something to fix it? I …

maybe you can try jupyter lab clean and restart again

Cripplingly slow UI: am I the only one?

JupyterLab

Jiadong May 16, 2022, 1:00pm 44

thanks:) Hope it can fixed soon…

Topic		Replies	Views
Problems when running Julia on JupyterLab JupyterLab	26	5554	June 15, 2020
Load performance of large notebooks on Windows (JL 3.x) JupyterLab	0	398	April 3, 2023
JupyterLab Version 4.2.1 barely useable due to a variety of glitches JupyterLab	16	13524	September 25, 2025
JupyterLab substaintially slower than Jupyter Notebook JupyterLab how-to	4	3646	January 10, 2022
Benefits of the classic UI and use cases for classic over JupyterLab (Was: Why is Tim not moving to lab?) General	20	7144	May 27, 2021

Cripplingly slow UI: am I the only one?

Related topics