1515787 - (blob image) Frozen browser and high cpu on tyk.io with webrender enabled

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect, P2)

Description

[Brian Pitts]

When I visit https://tyk.io/ without webrender enabled, it renders in a few seconds.

When I visit https://tyk.io/ with webrender enabled, Firefox locks up for about 40 seconds and it's cpu utilization tops 600%.

Profile with render disabled: https://perfht.ml/2Cps4HA

Profile with webrender enabled: https://perfht.ml/2Cq1kXB

I'm using Firefox Nightly on OS X on a Macbook Pro.

Comment 1

[Emilio Cobos Álvarez [:emilio]]

I somehow cannot repro on a clean profile with WR enabled, but can repro with my personal profile.

Here's a perf profile: https://perfht.ml/2V5tBts

Looks like we're rasterizing blobs over and over?

Comment 2

[Jeff Muizelaar [:jrmuizel]]

This page isn't amazing on Win Nvidia but is good enough to ship.

Comment 3

[Jeff Muizelaar [:jrmuizel]]

Brian can you add the "Renderer" and "RenderBackend" threads to the profiler and capture a new profile of the hang?

Comment 4

[Brian Pitts]

Sure. The new profile is at https://perfht.ml/2TzgHTd

Comment 5

[Jeff Muizelaar [:jrmuizel]]

Ok. This profile is waiting for Blob image rasterization. Can you add "WrWorker" to custom threads by name configuration of the profiler and grab a new profile?

Comment 6

[Brian Pitts]

I had to increase my profiler buffer size to grab this. Here you go: https://perfht.ml/2TAmXu0

Comment 7

[Jeff Muizelaar [:jrmuizel]]

It looks like we're spending a lot of time copy some large images. I wonder why it's not reproducible for everyone.

Comment 8

[Gregory Pappas [:gregp]]

Is this still reproducible? Here is an archive of the site close to the time of reporting if you need it.

Comment 9

[BugBot [:suhaib / :marco/ :calixte]]

Redirect a needinfo that is pending on an inactive user to the triage owner.
:gw, since the bug has high priority and recent activity, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 10

[Glenn Watson [:gw] | PTO until 6th Jan]

This renders fine on my local machine, but I wonder if it's related to bug #1767570.

Comment 11

[Glenn Watson [:gw] | PTO until 6th Jan]

This seems to work well after https://bugzilla.mozilla.org/show_bug.cgi?id=1767570 landed.