1502608 - Firefox hangs for short time

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect, P3)

Description

[leifeld]

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:60.0) Gecko/20100101 Firefox/60.0

Steps to reproduce:

I visited https://www.reddit.com/r/firefox/ where a grammerly advert was shown.



Actual results:

Apparently the grammerly advert leads Firefox not only to hang, but also the mouse courser to move very jumpy.
A perf.html recording : http://bit.ly/2OU6t1R


Expected results:

Mouse courser should move steadily as usually.

Comment 1

[Kanchan Kumari QA]

Hello Mike, Can you please look into the performance report? Thanks!

Comment 2

[leifeld]

I user Firefox Developer Edition (64), the User Agent was off because of "Resist Fingerprinting"

Comment 3

[Mike Conley (:mconley) (:⚙️)]

What I'm seeing looks like long rasterizations and composites. Moving to Core :: Graphics, and setting [qf].

Comment 4

[Andrew Osmond [:aosmond] (he/him)]

It is concerning how we spent ~247ms in allocating a D3D11 texture on the content main thread. We spend another 235ms acquiring the lock on a texture a few seconds later in the compositer thread. It was also expensive releasing a texture early on. Low on GPU memory perhaps and needs to shuffle some bits around to get the space?

Comment 5

[leifeld]

WebRender was enabled at the time, but I think it also occurred also with WebRender disabled.

Comment 6

[Markus Stange [:mstange]]

If this is reproducible with WR enabled, can you check how much GPU memory we're using? There's a section on about:memory that has this information. Can you attach your about:memory report?