Closed Bug 1492781 Opened 6 years ago Closed 2 years ago

Slow browser connections seem to end up in spin loops

Categories

(Core :: Graphics: WebRender, defect, P4)

Product:
Core
Component:
Graphics: WebRender
Platform:
Unspecified
macOS
Type:
defect

Tracking

()

Status:
RESOLVED WORKSFORME

People

(Reporter: djc, Unassigned)

References

(Blocks 1 open bug)

Details

(Keywords: nightly-community)

Whenever I'm on a very slow or unresponsive web site, Firefox (recent Nightly on macOS) spins up the CPU hard, causing my laptop's fan to blow and the battery to empty relatively quickly.
Keywords: nightly-community
Component: General → Networking
Product: Firefox → Core
I do have WebRender enabled, so I was thinking it might even be due to WebRender being inefficient about animating the throbber.
Component: Networking → Graphics: WebRender
Priority: -- → P4
Bug 1461239 fix might make cpu usage more efficient than before.
How much worse is the problem with webrender on vs off?
Flags: needinfo?(dirkjan)
a URL that simulates "slow connections" is https://jwatt.org/tmp/load-never-finishes.php
WR: https://perfht.ml/2ytk7hm non-WR: https://perfht.ml/2yw9x9o These profiles are after the CPU use has settled down observation: With WR, CPU goes to 100%, then comes down and settles in 10 seconds or so. Spikes a bit during this times Non-WR: settles down almost immediately
Actually, it looks like there's not a big difference for me in terms of WebRender vs non-WebRender. Both end up spinning the CPU hard for me.
Flags: needinfo?(dirkjan)

Is this still reproducible on latest Nightly?

Flags: needinfo?(dirkjan)

I'm using release now, but I cannot reproduce this.

Flags: needinfo?(dirkjan)
Status: NEW → RESOLVED
Closed: 2 years ago
OS: Unspecified → macOS
Resolution: --- → WORKSFORME
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