Website with blur paints very slowly

NEW
Unassigned

Status

()

Core
Layout: View Rendering
P3
normal
10 months ago
10 months ago

People

(Reporter: Felipe, Unassigned)

Tracking

Trunk
Points:
---

Firefox Tracking Flags

(firefox57 affected)

Details

(URL)

Attachments

(1 attachment)

(Reporter)

Description

10 months ago
Created attachment 8899893 [details]
blur-stack.txt

This example URL [1] has a blur applied to a div that comprises the entire page, as well as some extra blur applied in some paragraphs, and it also uses opacity.

We spend a lot of time painting it, slowing the content process significantly. APZ scrolls smoothly, but it leads to a lot of checkerboarding while the painting is catching up.

I'm attaching here a process sample taken with the Activity Monitor on Mac.


I don't know if it's the blur filter itself, or a combination of things. I haven't tested with WebRender


[1] https://www.theguardian.com/science/2017/aug/21/solar-eclipse-eye-damage

Updated

10 months ago
Priority: -- → P3
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