Long poll loading as an administrator

[OlivierHobbes]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github (I've searched it).
• I agree to follow Nextcloud's Code of Conduct.

What went wrong, what did you observe?

I have a poll shared with 80+ people via personal links (all different) with the option to register for 5 dates, to which 27 people have responded.
The loading time is fine for a user who is not logged in using their personal link, but it is very long for me as the poll administrator (more than 15 seconds).
During this time, I cannot scroll to see the list of responses, and it only becomes possible once the list of share links has loaded.
This problem occurs with Vivaldi and Edge, but not with Firefox. It also does not occur with polls shared with few people.

Translated with DeepL.com (free version)

What did you expect, how polls should behave instead?

A loading time of a few seconds

What steps does it need to replay this bug?

1. Create a poll with 5 dates
2. Create at least 40 ghest users with a personal link and select random dates for them
3. Load the poll as an administrator with a Chromium browser (Vivaldi or Edge).
   Then, the loading become slow and it's worse with more users.

Affected polls version

8.5.0

Installation method

Installed/updated from the appstore (Apps section of your site)

Installation type

Updated from a minor version within same major version (i.e. 8.0.0 to 8.1.2)

Can you rule out that any extension you use is involved in the issue?

• I have checked all browser extension

Which browser did you use, when experiencing the bug?

• Firefox
• Chrome
• Chromium/Chromium based (i.e. Edge)
• Safari
• Other/Don't know

Other browser

Vivaldi

Add your browser log here

Additional client environment information

No response

NC version

Nextcloud 32

Other Nextcloud version

No response

PHP engine version

PHP 8.1

Other PHP version

No response

Database engine

MySQL

Database Engine version or other Database

No response

Which user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other/Don't know

Add your nextcloud server log here

Additional environment informations

No response

Configuration report

List of activated Apps

Nextcloud Signing status

Additional Information

No response

[dartcafe]

I usually run around with Firefox and now tested with Chromium. The performance over all is scary compared to Firefox.

I can literally watch how each element of the page ist drawn. I have some big polls inside my test instance.

I have no idea, what this could be, I even don't have a clue where to start to investigate. And as I tried to replay it (right now) I have normal operation, but after switching between polls the performance breaks down. And it is definitely a front-end/JS/Vue/rendering issue.