Open Bug 1765897 Opened 2 years ago Updated 6 months ago

Performance on https://dragonflight.blizzard.com is not very good

Categories

(Core :: Graphics: WebRender, defect)

Product:
Core
Component:
Graphics: WebRender
Version:
Firefox 99
Platform:
x86_64
Linux
Type:
defect

Tracking

()

Status:
UNCONFIRMED
Project Flags:
Performance Impact low

People

(Reporter: gregp, Unassigned)

References

(Blocks 1 open bug)

Details

(Keywords: perf:animation, perf:responsiveness)

Steps to reproduce:

  1. Navigate to https://dragonflight.blizzard.com/
  2. Scroll the page

Actual results:

Lag and high CPU usage

Expected results:

Low CPU usage and smooth scrolling

From this reddit post.

Component: Untriaged → Performance
OS: Unspecified → Linux
Product: Firefox → Core
Hardware: Unspecified → x86_64

https://share.firefox.dev/3N4Hnak

Performance Impact: --- → ?

There are some janks in profile and I see two issues.

  1. Building display list is slow
  2. Once the command for webrender is created, it seems slow for it to receive the response. PWebGL::Msg_GetFrontBuffer was slow for example.

So I am moving this bug to GFX. I can also reproduce it in Chrome.

Performance Impact: ? → P3
Component: Performance → Graphics: WebRender
Keywords: perf:animation, perf:responsiveness
Severity: -- → S4
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