1656909 - Website with 3D photo is unbearably slow

Status: NEW

(Core :: Graphics: Canvas2D, defect)

Description

[Jonas H.]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:79.0) Gecko/20100101 Firefox/79.0

Steps to reproduce:

Go to http://www.der-ritzler.de/. It has some really annoying Google Maps (?) based image slideshow going on. The site is usable (though a bit slow) in Chrome but completely unusable in Firefox. With WebRender disabled it is a bit faster.

Profiles with and without WebRender:

https://share.firefox.dev/33nq28U
https://share.firefox.dev/2XqXAiC

Comment 1

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

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 2

[Darkspirit]

On Linux it's usable, but slightly stuttering when this 3D photo automatically moves around. (So I guess it's much worse on Mac?)

Comment 3

[Darkspirit]

On Win10 I had the impression it would not always react to mousedown (and therefore couldn't be moved by myself) while it was still automatically moving around.

Comment 4

[Dzmitry Malyshau [:kvark]]

Hmm, I tried on Linux/WR, and it's also horribly slow. Profile https://share.firefox.dev/30zMOZa shows it to be mostly busy in Canvas2D code.
So perhaps it's not a WR/mac bug at all? Unless I'm seeing a different issue here.

Comment 5

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

The component has been changed since the backlog priority was decided, so we're resetting it.
For more information, please visit auto_nag documentation.