Suggestions to troubleshoot Jupyter Notebook sluggish in browser?

[Xtian Simon]

After a recent system update on Archlinux (on 7/14 and 8/5), I've been experiencing noticeably sluggish rendering and browser interaction. For example,

- double clicking on a word or line to select text is slow at best if it selects the line at all.
- When the page loads, all notebook cells are blank until I click into them.

Using the latest Jupyter, Python 3, and Chromium stack on the Archlinux platform.

I don't have the same errors on other Chromium webpages--just Jupyter notebooks. And only recently.

The typical troubleshooting I would use:
- check disk usage. None of my partitions are over 54% full.
- downgrade packages. So far just downgraded Chromium.

Any suggestions where I should troubleshoot next?

[Thomas Kluyver]

Do you have any extensions installed in Chromium? Does it work if you try in Firefox?

--
You received this message because you are subscribed to the Google Groups "Project Jupyter" group.
To unsubscribe from this group and stop receiving emails from it, send an email to jupyter+unsubscribe@googlegroups.com.
To post to this group, send email to jup...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/jupyter/6ab87b24-5ff0-4f4b-b9da-74d3808cecd9%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Xtian Simon]

When I read your suggestion takowl, I slapped my forehead--why didn't I think of that?

Unfortunately, I wasn't so lucky. I tried Firefox and I started Chromium with all (but a bookmark plugin) turned off--same problems.

What else?

On Tuesday, August 15, 2017 at 5:06:57 AM UTC-5, takowl wrote:

Do you have any extensions installed in Chromium? Does it work if you try in Firefox?

On 15 August 2017 at 10:56, Xtian Simon <xtian...@gmail.com> wrote:

After a recent system update on Archlinux (on 7/14 and 8/5), I've been experiencing noticeably sluggish rendering and browser interaction. For example,

- double clicking on a word or line to select text is slow at best if it selects the line at all.
- When the page loads, all notebook cells are blank until I click into them.

Using the latest Jupyter, Python 3, and Chromium stack on the Archlinux platform.

I don't have the same errors on other Chromium webpages--just Jupyter notebooks. And only recently.

The typical troubleshooting I would use:
- check disk usage. None of my partitions are over 54% full.
- downgrade packages. So far just downgraded Chromium.

Any suggestions where I should troubleshoot next?

--
You received this message because you are subscribed to the Google Groups "Project Jupyter" group.

To unsubscribe from this group and stop receiving emails from it, send an email to jupyter+u...@googlegroups.com.

[Thomas Kluyver]

I'm pretty mystified - I don't remember hearing about those symptoms before. Do you have any Jupyter extensions installed, or any custom configuration?

You could try installing the 5.1 release candidate - I don't really expect it to make a difference, but you never know:

pip install --upgrade --pre notebook

To unsubscribe from this group and stop receiving emails from it, send an email to jupyter+unsubscribe@googlegroups.com.

To post to this group, send email to jup...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/jupyter/7f7e8fa8-485f-4126-9a37-ce4703d8c52d%40googlegroups.com.

[Xtian Simon]

Hmm.
The only config settings I've messed with are in `jupyter_notebook_config.py`. These are just user and browser preferences. And I created a file `nbconfig/notebook.json` for line wrapping.

My version of Python 3, Jupyter, and all the major Python modules is installed with Archlinux's rolling release. This means every few weeks I update the whole of my Linux package and system. I guess that would mean I'm on the leading (not bleeding) edge of stable releases. (^_^)

My Lenovo is about eight years old (ouch). It has 4G of RAM, and Intel Core 2 Duo (2.53 GHz).  I dunno, Is Jupyter platform known for being problematic on older systems?

If there are any other users of older systems--have tips for running Jupyter on older systems? Maybe this would help?

[Thomas Kluyver]

On 18 August 2017 at 20:37, Xtian Simon <xtian...@gmail.com> wrote:

The only config settings I've messed with are in `jupyter_notebook_config.py`. These are just user and browser preferences. And I created a file `nbconfig/notebook.json` for line wrapping.

Can you try commenting them out/moving the files aside to see if it's the same with a blank config? You can also try this by setting the environment variable JUPYTER_NO_CONFIG=1 .

 

My Lenovo is about eight years old (ouch). It has 4G of RAM, and Intel Core 2 Duo (2.53 GHz).  I dunno, Is Jupyter platform known for being problematic on older systems?

It's not the most efficient thing out there, but those specs should be fine.

[Xtian Simon]

Looks like the line wrapping was causing the slowdown. Checking the dates of my .bak file of the original config file, I see I did this the day after a big update.
Very confusing--system--browser--python--jupyter--to try to troubleshoot.

Thanks for your help Takowl

This setting file worked, but it slowed down my Core 2 Duo 2.5Ghz processor maybe?
[xtian nbconfig]$ cat notebook.json.wraplines
{
  "MarkdownCell": {
    "cm_config": {
      "lineWrapping": true
    }
  },
  "CodeCell": {
    "cm_config": {
      "lineWrapping": true
    }
  },
  "Cell": {
    "cm_config": {
      "lineNumbers": true
    }
  }

[Thomas Kluyver]

Weird, I don't know why line wrapping would make it noticeably slower (unless you have enormously long lines). Thanks for the follow up, anyway.

--
You received this message because you are subscribed to the Google Groups "Project Jupyter" group.
To unsubscribe from this group and stop receiving emails from it, send an email to jupyter+unsubscribe@googlegroups.com.
To post to this group, send email to jup...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/jupyter/81116796-5d72-463a-ab47-35a5607d08e1%40googlegroups.com.