1732196 - Pinch to zoom lag in fenix on gsmarena's desktop site

Status: NEW

(Core :: Graphics: WebRender, defect)

Description

[Michael Comella (:mcomella) [NI reported issues only; no longer employed by Mozilla]]

From github: https://github.com/mozilla-mobile/fenix/issues/21357.

Steps to reproduce

1. Go to gsmarena.com
2. Switch to desktop view
   3.Try zoom in and zoom out (either pinch to zoom or double tap hold and swipe to zoom)

Expected behaviour

Smooth pinch to zoom animation

Actual behaviour

Laggy animation and sometimes doesn't zoom out

Device name

Samsung Galaxy M51

Android version

Android 11

Firefox release type

Firefox Nightly

Firefox version

94.0a1

Device logs

No response

Additional information

https://user-images.githubusercontent.com/90913333/133792396-3c518f1e-af77-4150-94bb-411fe23e89dd.mp4

Change performed by the Move to Bugzilla add-on.

Comment 1

[Michael Comella (:mcomella) [NI reported issues only; no longer employed by Mozilla]]

I was able to reproduce on my Moto G5 (it is sometimes subtle) and took a profile: https://share.firefox.dev/3u78Yzk

Comment 2

[Timothy Nikkel (:tnikkel)]

I'm gonna guess graphics for a first pass.

Comment 3

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

The severity field is not set for this bug.
:jimm, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 4

[Olli Pettay [:smaug][[e-mail]]]

I can't really reproduce on Sony 10 II, or at least I can't see difference to Chrome. But based on the profile (comment 1) there are some slow composites

Comment 5

[Jamie Nicol [:jnicol]]

I can reproduce stuttering whilst zooming out, but not whilst zooming in. I think this is therefore related to the "low-quality pinch-zoom" mode, which is only enabled on nightly. Disabling that improves things for me.