[Webkit-unassigned] [Bug 126122] www.theonion.com hangs entire desktop

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=126122

--- Comment #14 from Michael Catanzaro <mcatanzaro at igalia.com> ---
(In reply to comment #13)
> I can sort of reproduce the Onion one with MiniBrowser built from master, on
> Fedora 21, using Mesa 10.4.x. The "sort of" is because I see a significant
> delay when the page loads, and if I interrupt loading the backtrace looks
> quite similar to what is in comment 9. BUT if I wait long enough, the page
> loads.

Often there is a significant delay, but the browser recovers and completes the load. When the load completes, I can look in System Monitor and see that I have one web process using 3.4 GiB of memory, the rest with 40 MiB apiece. I think that when the browser does not recover within a reasonable amount of time, it has simply allocated something much more than 3 GiB and begun swapping.

> And my desktop does not hang. Is it definitely a hang, or if you walk
> away and make a sandwich, do you find things back to normal upon your return?

It does recover after a "sandwich," but it's very slow when I return (e.g. unlocking the computer takes ~5s, launching any application takes ~15s) and the desktop will regularly hang for ~5s intervals. I think this is just swapping.

(In reply to comment #13)
> As for the backtraces in comment 10 and comment 11: Are those from the
> Onion? 

No:

(In reply to comment #8)
> Here are three backtraces taken on projects.archlinux.org (where I
> experience the same symptoms).

If you think that is a different bug, I can reopen bug #126123, but I hope they're the same. The Onion is worse for testing because it reloads itself (probably to trick its advertisers into thinking it gets more page views than it really does) and it's not fun when I forget and a background tab triggers the bug.

> Or are they from pages with select elements? And if the latter, is
> the problem seen primarily when there are a bunch of options in a given
> select element? 

Yes, that must be it, good call! projects.archlinux.org has a huge combo box in the upper right that I never noticed until you suggested I look for select elements. bugzilla.redhat.org has one as well. These are well-known to perform horrendously (I use Firefox when I need to change a Component on bugzilla.redhat.com).

I don't see one on the Onion, though.

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