1654178 - [Fission?] Lag while switching tabs

Status: RESOLVED WORKSFORME

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

Description

[Paul Bone [:pbone]]

I'm using webrender and fission on Nightly running on Linux x86_64. Today I'm noticing a fair amount of lag (0.3-0.5s) while switching tabs. This could be a process/tabed browser issue. But in the profile I see a lot of time spend waiting on condition variables for WebRender. I'm not sure which it is, I'll file it against fission for now.

https://share.firefox.dev/32FBagH

Comment 1

[Chris Peterson [:cpeterson]]

Looks like a WebRender issue. Is this Linux only? I don't see that much lag on Windows.

Tracking perf issues for Fission M7 Beta. This doesn't need to block Fission Nightly if it doesn't affect all users.

Comment 2

[Darkspirit]

Is this on X11, XWayland or Wayland?

Comment 3

[Paul Bone [:pbone]]

(In reply to Chris Peterson [:cpeterson] from comment #1)

Looks like a WebRender issue. Is this Linux only? I don't see that much lag on Windows.

Linux only, once I restarted the browser it went away so IDK how to reproduce at all and have not tried on Windows.

Comment 4

[Paul Bone [:pbone]]

(In reply to Jan Andre Ikenmeyer [:darkspirit] from comment #2)

Is this on X11, XWayland or Wayland?

x11 I think. That's what I get with:

$ loginctl show-session c2 -p Type
Type=x11

Comment 5

[Kris Taeleman (:ktaeleman)]

@rares: Do you still see this?

Comment 6

[Rares Doghi, Desktop QA]

Hi Kris, I think the need info was meant for Paul, I will redirect the need info to him, but we did try to reproduce this issue with our latest nightly build on an Ubuntu 18.04 machine with an Intel HD 630 but without success.

@Paul are you still seeing this issue ?

Comment 7

[Paul Bone [:pbone]]

I havn't seen this for some time. I never figured out how to reproduce it in the first place so maybe it just hasn't happened again, or maybe it's fixed. I don't know.

Comment 8

[Kris Taeleman (:ktaeleman)]

I'll close this, it can be re-opened if the issue re-appears