1610946 - Webrender not scroll or zooming smooth on Chinese website.

Status: UNCONFIRMED

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

Description

[__oldboek]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:74.0) Gecko/20100101 Firefox/74.0

Steps to reproduce:

e.g. https://www.cnbeta.com/

https://github.com/mozilla-mobile/fenix/issues/7401

Comment 1

[Jeff Muizelaar [:jrmuizel]]

This seems ok for me on a Pixel 2. What device are you seeing the problem on? How bad is it?

Comment 2

[Kris Taeleman (:ktaeleman)]

@jboek: Is this with webrender enabled or disabled? I can see some delays without webrender, but webrender on seems fine. Can you add an about:support?

Comment 3

[__oldboek]

@ktaeleman:

According to the reporter they're using a xiaomi mi note 3. So I would assume without webrender.

They also posted the contents of their about:support here: https://github.com/mozilla-mobile/fenix/issues/7401#issuecomment-617248252

Comment 4

[Kris Taeleman (:ktaeleman)]

@ktaeleman: Get profile

Comment 5

[Kris Taeleman (:ktaeleman)]

@jnicol: I captured a profile on Pixel 2 XL, but that feels quite smooth. Can you check the Moto G7?
Pixel 2 XL Profile: https://share.firefox.dev/3cF3GjY

Comment 6

[Jamie Nicol [:jnicol]]

Profiles on Moto G7 Play (Adreno 506)

• scrolling: https://share.firefox.dev/3dIQVGF
• zooming: https://share.firefox.dev/3dIQVGF

Scrolling seems fine but zooming is a disaster. Time seems to be spread between glClear dequeuing a buffer (which might be waiting on the GPU), VAO uploads, and texture uploads.