Poor browser performance with Flash embed set to use wmode




15 years ago
12 years ago


(Reporter: etraversa, Unassigned)


Windows XP

Firefox Tracking Flags

(Not tracked)





15 years ago
User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a5) Gecko/20041101 Firefox/0.9.1+
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a5) Gecko/20041101 Firefox/0.9.1+

In this test case i embed a heavy flash file (161k) with lots of things in
motion at the same time to demonstrate the different cpu outputs I keep getting.   

On Internet Explorer I obtain a cpu output of between 57-63%
On Mozilla and Firefox the cpu is at 100% constant.  

If wmode is not used, then the browsers are identical in performance, setting
wmode causes the problem to appear.  

I'm on Pentium 4, 2.53, with 512 megs of ram.

Reproducible: Always
Steps to Reproduce:
1.Set a flash movie to wmode="transparent" or wmode="opaque"

Actual Results:  
CPU peaked at 100% on moz

Expected Results:  
Be comparable to Internet Explorer In performance

Comment 1

15 years ago
yes it's true, some consideration

explorer-transparent: 60-70%
firefox-transparent: 100%

explorer-opaque: 65-75%
firefox-opaque: 60-70%
Note that the flash binaries used by IE and Firefox are different... this could
well be an issue in the flash binaries themselves.

Comment 3

14 years ago
I've seen this behavior on tons of websites, especially with those annoying
animated Flash ads. Sometimes it's so bad I have to disable Flash to even
attempt to browse the site because the CPU is pegged at 100%. Since IE also has
issues, just not as bad, I'd guess this is a half Firefox/half Flash plugin problem.
This is an automated message, with ID "auto-resolve01".

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Comment 5

14 years ago
This problem is still there as of 1.5 beta 1.
URL is gone, but duping based on comment 0 which mentions opaque
Last Resolved: 12 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 233533
wrong dupe
Duplicate of bug: 341380


12 years ago
Blocks: 289198


12 years ago
No longer blocks: 289198
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