152994 - Gecko uses more cpu with multiple windows open with flash embeds

Status: VERIFIED FIXED

(Core Graveyard :: Plug-ins, defect)

Description

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The CPU usage on www.sina.com.cn is higher for gecko than IE.
Bug 152731 also deals with this issue but includes several other sites. 
The intent of this bug is to focus in on just one site.

Comment 1

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My system is a

 Dell Presision 210
 500MHz PIII
 384M ram
 running WinXP

Comment 2

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Attachment: zip of www.sina.com.cn and associated files saved via IE

This is a copy of the site so the testing can be reproduced on different
browsers

Comment 3

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Attachment: screen shot showing IE and taskmgr

IE uses about 75-80% CPU

Comment 4

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Attachment: screen shot showing NS 20020619 branch and taskmgr

NS 20020619 branch uses about 40% CPU

Comment 5

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Attachment: screen shot showing NS 20020619 trunk and taskmgr

NS 20020619 trunk uses about 50% CPU

Comment 6

[shrirang khanzode]

how many cpu usage bugs are we going to file? :(  
 

Comment 7

[shrirang khanzode]

*** This bug has been marked as a duplicate of 152731 ***

Comment 8

[shrirang khanzode]

v

Comment 9

[kill this account]

shrirang: please do not close this again. This is not a duplicate of bug 152731.

Comment 10

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shrirang: This issue is a high priority issue for some of us. It would not
surprise me if several bugs were opened. Bug 152732 is very defocused. Even a 
quick read thru bug 152731 indicates there may be different problems on different
sites as well as different problems on a given site. Bug 152731 does not have a
clearly identified problem.

As noted in the opening comments this bug is focused on just one site. This bug
may in fact break into several bugs if different problems are identified.

Comment 11

[kill this account]

s/Bug 152732/Bug 152731/

Comment 12

[shrirang khanzode]

ok :)

Comment 13

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Attachment: zip of www.sina.com.cn and associated files

add <base href="">
disabled time_log accesses to www.sina.com.cn

Comment 14

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branch build: 2002-06-19-08-1.0   - Shockwave Flash 6.0 r29
trunk build:  2002-06-19-08-trunk - Shockwave Flash 6.0 r29
IE                                - Flash 5

Comment 15

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Attachment: zip of www.sina.com.cn and associated files saved via NS - part 1

Comment 16

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Attachment: zip of www.sina.com.cn and associated files saved via NS - part 2

Comment 17

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Attachment: zip of www.sina.com.cn and associated files saved via NS - part 3

Comment 18

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Attachment: screen shot showing IE and taskmgr (NS)

IE uses about 85%
(site saved via NS)

Comment 19

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Attachment: screen shot showing NS 20020619 trunk and taskmgr (NS)

NS trunk uses about 55%
(site saved via NS)

Comment 20

[Peter Lubczynski]

Flash bug? Is this reproducable with Flash 5 with Gecko? Is this reproducable
without Flash at all?

Comment 21

[shrirang khanzode]

I tested this on NT with 0617 branch buidl with flash 5.0r41 and flash6.0r29 
(that  is bundled)


results:

* With flash 5.x, the cpu usage hovers between 35-90 %...mostly in the 60-80 
range sometime peaking to 90-95...

* With flash6.0r29 , the cpu usage dramatically goes up, and memory usage as 
well. The cpu range is like 55-100 %...mostly hovering in the low 90's...going 
to 100 often..

Flash bug ??????

Comment 22

[shrirang khanzode]

bstell, can u try replacig the flash6 with flash5 on ur branch build and check? 
Thx!

Comment 23

[Peter Lubczynski]

dup of http://bugzilla.mozilla.org/show_bug.cgi?id=132759

Comment 24

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Attachment: screenshot of branch and taskmgr - Flash 5 r41

Comment 25

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NS branch uses about 21% with Flash 5

Comment 26

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Attachment: screenshot of IE and taskmgr (for comparison to previous attachment)

This was done just after the previous attachment.
IE using Flash 6 uses about 85% CPU to display http://www.sina.com.cn

Comment 27

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Attachment: screen shot showing NS 7.0 PR1and taskmgr

NS 7.0 PR1 uses about 45% to display http://www.sina.com.cn

Comment 28

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Attachment: screen shot showing NS 20020619 trunk (no flash) and taskmgr

without flash NS 20020619 trunk uses about 2% CPU to display
http://www.sina.com.cn

Comment 29

[shrirang khanzode]

flash audio  test :

http://jazz/users/shrir/publish/flashacceptancesuite/Sound/Streaming/Kidrock.swf

Comment 30

[kill this account]

Switching to Flash 5 "solves" this issue so this is a dup of bug 132759.

*** This bug has been marked as a duplicate of 132759 ***

Comment 31

[shrirang khanzode]

.

Comment 32

[shrirang khanzode]

just talked with Brian. Am reopening this bug since it's a bit different than 
132759. Here, in this bug, we want to follow up on why flash eats up cpu even 
when 4 out of 5 windows are in the background. There is a significant more usage 
of cpu. We need macromedia's help on this..correct? For testing, pls check out 
Brian's comment in this bug here 
http://bugzilla.mozilla.org/show_bug.cgi?id=152731#c29

Open these tests one by one in seperate windows, then observe how much cpu gecko 
uses. You will be forced to kill netscape.

Comment 33

[kill this account]

try opening several separate windows showing http://www.macromedia.com/

The window bar and menus stop responding but interestingly buttons (eg: the 
netscape home page button) still respond.

Comment 34

[Doron Rosenberg (IBM)]

can you say topembed :)

Comment 35

[kill this account]

I opened bug 154725 to address the fact that the window bar and menus stop 
responding.

Comment 36

[Eugene Savitsky]

I couldn't understand: is this bug for moziila being slow on a pages with many
flash banners?

Moz is very slow and unresponsible if open a few pages on http://www.ixbt.com/.

Comment 37

[kill this account]

The issue is that Flash can use a large amount of CPU even if the Flash
is hidden. MacroMedia has a fix for this which should come out shortly.

Comment 38

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The issue of Flash using a significant amount of CPU even if it is not visible has
been fixed with the release of Flash r47.

Comment 39

[Jaime Rodriguez, Jr.]

shrir: can you pls verify this one as fixed? thanks!

Comment 40

[shrirang khanzode]

yeah, this issue was gone after we got new bits from macromedia.(6.0r47)