1553959 - Site with filters (https://www.scandinavianphoto.se/) takes longer to load in Fennec than in Chrome/Safari

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect, P3)

Description

[Ksenia Berezina [:ksenia]]

1. On Firefox (66.0.5) on Android
2. Go to https://www.scandinavianphoto.se/

Expected:
Site loads as fast as in Chrome

Actual:
Loading/rendering takes a long time. Also when clicking on elements it takes a long time for the site to react.

Link to a profile

Comment 1

[Randell Jesup [:jesup] (needinfo me)]

70% of time is spent (on MainThread) in mozilla::gfx::FilterNodeCompositeSoftware::Render() in that Fennec profile.

Here's a GeckoView_Example profile:
https://perfht.ml/2W7jkl3

36 of 49s(!) of capture time is in FilterNodeSoftware::
https://perfht.ml/2VYoQGm

Comment 2

[Markus Stange [:mstange]]

Looks like nested blur or drop-shadow filters. If they are CSS filters, then WebRender will make them fast. If they are SVG filters, WebRender needs SVG filter support first (bug 1409486).

Comment 3

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

The priority flag is not set for this bug.
:jbonisteel, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 4

[Jeff Muizelaar [:jrmuizel]]

This runs reasonably well with WebRender turned on. Does anyone think it's still worth investigating trying to improve the non-webrender version?