Bug 239856

Summary:	[GTK] Certain page kills CPU, media playback kills the page
Product:	WebKit	Reporter:	Milan Crha <mcrha>
Component:	WebKitGTK	Assignee:	Nobody <webkit-unassigned>
Status:	REOPENED ---
Severity:	Normal	CC:	bugs-noreply, mcatanzaro, philn
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Milan Crha 2022-04-28 09:30:15 PDT

This is with 

   webkit2gtk3-2.36.0-1.fc36.x86_64
   epiphany-42.0-1.fc36.x86_64

but reproduced also with the MiniBrowser, thus filling here.

Open: https://finance.yahoo.com/quote/TSLA?p=TSLA

You'll be asked for cookies, I simply disable everything, which is two-clicks task here - thank you Yahoo!.

Two problems:
1) after the page loads see the graph and keep the page staying; enjoy a WebKitWebProcess chewing your CPU.


2) scroll lower on the page - there's a video;
   - epiphany has an "autoplay without sound" by default, unless you
     happen to disable it earlier, once the video loads the page freezes, completely;
     I tried to Deny autoplay, but it didn't help, the page froze anyway.

   - Minibrowser - claims missing H.264 (High Profile) decoder. - keep the message
     there and scroll lower on the screen, until the video is shown and it begins loading;
     wait several seconds, once CPU calms down the page is frozen. I moved even lower
     on the page, but I think the problem is once the video loads

Comment 1 Milan Crha 2022-04-29 01:49:35 PDT

Michael, did you remove the "Performance" keyword intentionally? This does relate to performance, a lot.

Comment 2 Michael Catanzaro 2022-04-29 06:51:33 PDT

Yeah, that keyword is best reserved for developers working with performance tests.

Comment 3 Milan Crha 2022-05-02 06:00:24 PDT

This seems to cure with the 2.36.1 update, thus I'm closing this.

Comment 4 Milan Crha 2022-05-02 09:20:13 PDT

(In reply to Milan Crha from comment #3)
> This seems to cure with the 2.36.1 update, thus I'm closing this.

Oh, I'm sorry, it seems Yahoo! update the page and it's still there. I guess it's related to the videos on the page, though it's killing the CPU even when I have the video autoplay set to "Deny" in the Epiphany.

Comment 5 Philippe Normand 2022-07-11 09:09:20 PDT

I can reproduce issue #1 but not #2 with Ephy TP.