902542 - many big canvas elements → quick use/eat up of RAM/memory (→ browser or system crash)

Status: RESOLVED INCOMPLETE

(Core :: JavaScript: GC, defect)

Description

[[:Aleksej]]

Attachment: (DANGEROUS) page from http://ec2-54-229-117-209.eu-west-1.compute.amazonaws.com/party.html (Google ad/analytics removed)

ohmed posted at http://habrahabr.ru/post/188864/: "…while writing my project, I have accidentally created many, many big canvas elements.  Had to restart my OS as the result."

Reproduced with 2013-08-04-03-02-07-mozilla-central-firefox-25.0a1.en-US.linux-x86_64
Comments say the page causes RAM overuse or at least tab crash or hang with Opera 12, and Chrome and Chromium 28, and Safari on iOS.

Comment 1

[[:Aleksej]]

Unlike bug 721229 and bug 881644, there seem to be no gradients.  I haven't tried without HWA (bug 790896).

Comment 2

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Sounds like a straightforward resource consumption issue -- especially with a 64-bit build, we can keep allocating lots and lots of memory.  Eventually, your OS will start complaining or having issues, but I don't think there's anything we can (or should) do.

Comment 3

[u279076]

Aleksej, do you still see this behaviour with current 64-bit builds?

Comment 4

[[:Aleksej]]

Still happens with 2016-07-08-03-02-16-mozilla-central-firefox-50.0a1.ru.linux-x86_64.

Comment 5

[u279076]

Attachment: profile.json.zip

I checked this locally. In Firefox Nightly 50.0a1 I get ~77% CPU usage and ever-increasing memory until it eventually OOMs. In Chrome I get over 100% CPU usage and memory usage hovering between 200 and 500MB. Looking at a Performance profile in Nightly I can see we're doing a lot of GC calls. If we're failing to manage these GC calls properly I suppose that could explain the memory usage pattern. Based on this however I am not convinced it's a graphics bug.

Comment 6

[Rares Doghi, Desktop QA]

Closing this one as incomplete since the reporter is no longer available but we can reopen this issue in case it starts to reoccur.