1639976 - Poor performance during a Zoom call

Status: RESOLVED INACTIVE

(Core :: WebRTC, defect, P1)

Description

[alex_mayorga]

¡Hola!

Had some terrible performance during a Zoom call with today's Firefox Nightly.

Managed to capture https://perfht.ml/3bTMTJw

Filing this report in case it is useful.

¡Gracias!
alex

Comment 1

[Michael Froman [:mjf]]

Byron, any thoughts?

Comment 2

[Byron Campen [:bwc]]

The content process running zoom seems to be spending all of its time in mozilla::detail::EventQueueInternal::PutEvent, and only a tiny minority of that time is being spent in the actual work that function does (mozilla::Queue::Push). That says we're spending tons of time in here:

https://searchfox.org/mozilla-central/rev/bc3600def806859c31b2c7ac06e3d69271052a89/xpcom/threads/EventQueue.cpp#23-32

That's gecko profiler code. Has this problem ever happened when you were not running the gecko profiler?

Comment 3

[alex_mayorga]

¡Hola Byron!

I ran the profiler in the hopes of capturing the terrible performance in Zoom and give y'all something actionable.

The Zoom call was bad even before the profiling started.

With that said I caved and ended up installing the Zoom client.

If useful I could get on a Zoom call with someone and troubleshoot live if it helps things.

Would you be interested on that?

¡Gracias!
Alex

Comment 4

[Byron Campen [:bwc]]

Was this a video call? I cannot get zoom to capture video at all, either on nightly or release.

Comment 5

[alex_mayorga]

¡Hola Byron!

Yes, this was a video call.

¡Gracias!
Alex

Comment 6

[Byron Campen [:bwc]]

Ok. I've filed bug 1643038 for the video capture problem. Is video capture working for you at all right now?

Comment 7

[alex_mayorga]

¡Hola Byron!

I've tested over at https://zoom.us/test and I can see my own video albeit it seems to refresh rather slowly IMHO.

Here's the profile of the whole interaction in case it is useful:

https://share.firefox.dev/30eaLpf

Please let me know if there's anything else I could provide to assist on your investigation.

¡Gracias!
Alex

Comment 8

[alex_mayorga]

¡Hola y'all!

Tried again today and the issue is still there.

A fresh profile at https://share.firefox.dev/2RWCDc8

Please let me know if anything is needed from the affected system.

¡Gracias!
Alex

Comment 9

[Patricia Lawless]

Setting this to P1 for investigation and analysis so we can determine its true impact to the user.

Comment 10

[alex_mayorga]

¡Hola y'all!

Tried again today and the issue is still there i.e. there's high CPU usage and the laptop fan gets loud.

A fresh profile at https://share.firefox.dev/3upBQSB

Please let me know if anything is needed from the affected system.

¡Gracias!
Alex

Comment 11

[Michael Froman [:mjf]]

Alex, I'm curious to know if you see any improvement on Nightly v96. I've tried it locally and it seems to make some difference, but I'm in a VM so I don't know if that translates to an improvement you'll see.

Comment 12

[Michael Froman [:mjf]]

I'm going to close this as resolved/inactive since we've gone 2 weeks without a reply and many months of prior inactivity.