873217 - animated favicon causes high cpu usage even though tab is not being viewed; do not animate favicons of inactive tabs?

Status: UNCONFIRMED

(Core :: Graphics: ImageLib, defect)

Description

[Juha Heljoranta]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:20.0) Gecko/20100101 Firefox/20.0 (Beta/Release)
Build ID: 20130401133152

Steps to reproduce:

Goto page with animated favicon such as:
http://www.nedprod.com/programs/portable/nedtries/

Open a new tab so that the page with animated favicon is not visible.


Actual results:

Observe significantly higher cpu. If tab with animated favicon is not active cpu usage should stay low.




Expected results:

Constant high cpu usage despite what tab is selected.

Suggesting that Firefox stops animated favicons while tab is not active.

Comment 1

[Cornel Ionce [:noni] [Hubs QA]]

Juha, what do you mean by significantly higher cpu?

I've tested on the same FF version as you and I saw a cpu increase for about 3%.

Comment 2

[Juha Heljoranta]

There is ~ten fold increase in cpu usage: from 0.2 - 1.0 % to 8 - 16 %.

$ rpm -q firefox
firefox-21.0-3.fc17.x86_64

CPU: Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz

Comment 3

[(mostly gone) XtC4UaLL [:xtc4uall]]

Confirmed with Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20130609 Firefox/24.0 ID:20130609031230 CSet: efbe547a7972

Comment 4

[Tristan Miller]

I can confirm this on Mozilla/5.0 (X11; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0 SeaMonkey/2.23 -- my CPU usage goes from 4% to 45%.

Perhaps a better solution to this problem would be the one proposed in Bug 111373.

Comment 5

[Frank-Ralph Reiser]

Confirmed on gentoo linux 64bit using firefox 29.0.1:
"Mozilla/5.0 (X11; Linux x86_64; rv:29.0) Gecko/20100101 Firefox/29.0"

CPU load (according to "top") is between 7% and 15% with the mentioned website with the animated favicon visible in the non-active tab.
If I close that tab, CPU load is at 1% with some peaks at 4%.
("Intel Xeon CPU W3550 @ 3.07GHz")

Comment 6

[Tristan Miller]

Problem still reproducible with Mozilla/5.0 (X11; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0 SeaMonkey/2.23.

Comment 7

[Tristan Miller]

Oops -- I meant to write Mozilla/5.0 (X11; Linux x86_64; rv:33.0) Gecko/20100101 Firefox/33.0 SeaMonkey/2.30.

Comment 8

[Tristan Miller]

I can't reproduce this problem with SeaMonkey 2.53.14. CPU usage seems to be about the same (up to 14%) whether or not a tab with an animated favicon is open (and whether or not that tab is active).