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Firefox and CPU power

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molngab
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Firefox and CPU power

Hello!

My question: why use Firefox portable 40-50, sometimes 60% of my CPU power?
Opera use only 5-10%.

Thanks

Jimbo
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In my experience

Flash.

Every time I've seen FF using excessive processing power, it has been due to some flash content on one of the tabs that is constantly animating something. As soon as I close the tab, the problem goes away.

I know that Flash apps can be written well and not do this, so it is just down to badly written bits of Flash, rather than Flash itself, but, when I've seen FF doing that, that has always been the cause.

molngab
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Flash? Maybe. And maybe not.

I tested my Firefox Portable, with simple web pages. No flash, no animation.
Here is the result:
http://kepfeltoltes.hu/080329/cpu_power_www.kepfeltoltes.hu_.jpg

Tim Clark
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Joined: 2006-06-18 13:55
More Information please

More Information please

OS? Ram? Processor Speed?
Running from USB or Local Hard Drive?
Plug-Ins[extensions] you are using?

What is happing/what are you doing when you see this high usage?
Downloading? Viewing media content on line?
Do you have other apps open when this happens?

I am running FFP from my local hard drive.
WinXPSP2, 1 Gig Ram, 3.2 GHz

FFP/FF is currently using 54MB of Ram, it has been open for 45 min.
I have 4 tabs open as I write this.
I have just refreshed 3 of the tabs.
CPU usage is: 0-10%

Tim

Things have got to get better, they can't get worse, or can they?

KickButts
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Tim

I tried to reproduce your test.

I am running FFP from my USB thumb drive at work.
WinXPSP2, 256 MB Ram, 3.0 GHz

FFP/FF is currently using 77MB of Ram, it has been open for 1 hour.
I have 4 tabs open as I write this.
I have just refreshed 3 of the tabs.
CPU usage is 0-10% now, but when refreshing I got over 86%.

Alive and kicking!
"If you were a robot, and I knew but you didn't, would you want me to tell you?"

Tim Clark
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How Long does it last ?

"CPU usage is 0-10% now, but when refreshing I got over 86%"

How Long does it last?
One second, 5 seconds, till the pages are done being refreshed, a significantly long time after the refresh is done?

Tim

Things have got to get better, they can't get worse, or can they?

KickButts
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Tim

The peak lasted only a few seconds, but I got an overall usage above 50% during the refreshing of the tree pages.

By the way, the pages were PortablesApps.com FFP Forum, Hotmail and GMail, all logged in.

FFP open for about 4 hours now, and is using 82 MB of RAM and 109 MB of virtual mem.

Alive and kicking!
"If you were a robot, and I knew but you didn't, would you want me to tell you?"

Bruce Pascoe
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Joined: 2006-01-15 16:14
...

Refreshing a page is going to be an intensive operation in any case (lots of stuff has to be downloaded, the HTML has to be parsed into a data hierarchy of some sort, etc...) and you should be thankful it's only around 50%-60% because it could very easily spike the CPU at 100%.

If the ~50% CPU usage persists after the page(s) are completely loaded, THEN you have a problem.

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