Open Bug 1615051 Opened 4 years ago Updated 1 year ago

Hangs caused by expensive animations on https://paulstamatiou.com/work/ can freeze Firefox

Categories

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

Product:
Core
Component:
Graphics: WebRender
Type:
defect

Tracking

()

People

(Reporter: Harald, Unassigned)

References

(Blocks 1 open bug)

Details

(Keywords: perf)

STR: Opening https://paulstamatiou.com/work/ and scrolling down

AR: With and without WebRender scroll-triggered fade-in animations cause massive hangs.

With WebRender Nightly doesn't even recover enough to take a profile right now, but I keep trying.

Can you attach the contents of your about:support? I don't see the hangs on my Mac at first glance.

Flags: needinfo?(hkirschner)

To get the janky behaviour on my machine I need to take care to make sure to generate the mouse over animations of the various elements while scrolling. If I just scroll down without that it goes relatively smoothly.

Confirmed on Windows 10 Reference Hardware (Acer) with WebRender on.

See all the elements and properties that animate on hover:

  • Open Inspector and select #twitter-threads element
  • Open Animations tab in Inspector sidepanel
  • Open the :hov menu and check :hover
Flags: needinfo?(hkirschner)

It is janky with WR and on Chrome too on Linux for me.

Blocks: wr-perf
Keywords: perf
OS: Unspecified → All
Hardware: Unspecified → All
Priority: -- → P3
Blocks: wr-gpu-memory
No longer blocks: wr-perf
Severity: normal → S3
Component: Graphics → Graphics: WebRender
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