1927053 - e.issuu.com - Magazine pages are not fully loaded and navigation is laggy

Status: NEW

(Core :: Graphics: Canvas2D, defect, P3)

Description

[Calin Tanase (OOO until 22nd of Nov)]

From github: https://github.com/webcompat/web-bugs/issues/143171.

<!-- @browser: Firefox 131.0 -->
<!-- @ua_header: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0 -->
<!-- @reported_with: unknown -->

URL: https://e.issuu.com/embed.html?d=2024_10_19_mdj_mdj_c_001&u=cobblifemagazine

Browser / Version: Firefox 131.0
Operating System: Mac OS 14.7
Tested Another Browser: Yes Edge

Problem type: Something else
Description: Pages turn very slowly
Steps to Reproduce:
Try turning the pages with the buttons, it's very laggy compared to Edge

<details>
<summary>Browser Configuration</summary>
<ul>
<li>None</li>
</ul>
</details>

From webcompat.com with ❤️

Change performed by the Move to Bugzilla add-on.

Comment 1

[Calin Tanase (OOO until 22nd of Nov)]

Performance Profile: https://share.firefox.dev/4fjT62y

Comment 2

[Calin Tanase (OOO until 22nd of Nov)]

Attachment: Nightly vs Chrome.mp4

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

Since nightly and release are affected, beta will likely be affected too.
For more information, please visit BugBot documentation.

Comment 4

[Brad Werth [:bradwerth]]

We're spending a lot of time in GL_ReadPixels and in TexUnpackBlob::ConvertIfNeeded. When running the site, animations seem to be very smooth as long as the to-be-revealed texture is in cache.

Comment 5

[Glenn Watson [:gw]]

Could we get a profile with screenshots disabled?

Comment 6

[Brad Werth [:bradwerth]]

Lee, would you take a look at this please, since it appears to be a webgl canvas issue?

Comment 7

[Mayank Bansal]

(In reply to Glenn Watson [:gw] from comment #5)

Could we get a profile with screenshots disabled?

https://share.firefox.dev/4f4zKyY (Win11x64 + AMD iGPU)