[gentoo-user] firefox 1.5 CPU usage - is it normal?

[gentoo-user] firefox 1.5 CPU usage - is it normal?

[b.n.]

Hi,
I updated today to FF 1.5.0.4 x86 stable.
I noticed that it seems to eat MUCH more cpu than 1.0.x ; in particular 
when scrolling pages or the bookmarks the cpu usage rockets to >90%, and 
scrolling becomes not fluid. It also tends to get stuck when loading 
pages and the like.

Is it normal behaviour? I looked in the forums but I found nothing.
Thanks,
m.
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Re: [gentoo-user] firefox 1.5 CPU usage - is it normal?

[Fabrice Delliaux]

b.n. a écrit :
> Hi,

Hi,

> Is it normal behaviour? I looked in the forums but I found nothing.

Did you try with a new profile ?

	$ firefox -ProfileManager

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Re: [gentoo-user] firefox 1.5 CPU usage - is it normal?

[b.n.]

> Did you try with a new profile ?
> 
>     $ firefox -ProfileManager

Yes. Same issues. I also reinstalled Flash plugin and I noticed that 
flash playback is horribly slow and also eats CPU.

m.


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Re: [gentoo-user] firefox 1.5 CPU usage - is it normal?

[Lord Sauron]

On 6/5/06, b.n. <brullonulla@gmail.com> wrote:
> > Did you try with a new profile ?
> >
> >     $ firefox -ProfileManager
>
> Yes. Same issues. I also reinstalled Flash plugin and I noticed that
> flash playback is horribly slow and also eats CPU.

Do you have smooth scrolling turned on?  When I had that on it just
tore through whatever remaining CPU I had left like oil refinery on
fire because it was re-rendering everything so darn often.  On my
machine, that was such excrutiating torture...

-- 
========== GCv3.12 ==========
GCS d-(++) s+: a? C++ UL+>++++ P+
L++ E--- W+(+++) N++ o? K? w--- O? M+
V? PS- PE+ Y-(--) PGP- t+++ 5? X R tv-- b+
                DI+++ D+ G e* h- !r !y
========= END GCv3.12 ========
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Re: [gentoo-user] firefox 1.5 CPU usage - is it normal?

[b.n.]

> Do you have smooth scrolling turned on?  When I had that on it just
> tore through whatever remaining CPU I had left like oil refinery on
> fire because it was re-rendering everything so darn often.  On my
> machine, that was such excrutiating torture...

Nice suggestion. With smooth scrolling turned off, things are a bit 
smoother (oh, the irony...) - I didn't know about this "feature".

I'm also removing extensions to see where's the culprit.

m.


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Re: [gentoo-user] firefox 1.5 CPU usage - is it normal?

[b.n.]

Update. I tried with firefox -safe-mode and things are somehow better 
(but still not as good as with FF 1.0.x).

m.
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Re: [gentoo-user] firefox 1.5 CPU usage - is it normal?

[Alexander Kirillov]

> I updated today to FF 1.5.0.4 x86 stable.
> I noticed that it seems to eat MUCH more cpu than 1.0.x ; in particular
> when scrolling pages or the bookmarks the cpu usage rockets to >90%, and
> scrolling becomes not fluid. It also tends to get stuck when loading
> pages and the like.
> 
> Is it normal behaviour? I looked in the forums but I found nothing.

Pango is enabled by default in Firefox 1.5.
export MOZ_DISABLE_PANGO=1 and try again.
There's been a thread in the forums lately:
http://forums.gentoo.org/viewtopic-t-460383-highlight-mozdisablepango.html

HTH,
Sasha

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Re: [gentoo-user] firefox 1.5 CPU usage - is it normal?

[b.n.]

> Pango is enabled by default in Firefox 1.5.
> export MOZ_DISABLE_PANGO=1 and try again.

Wow. Thanks a lot, I missed that post in the forums.
It seems to make a difference.
Why does Pango support cripple the thing?

m.
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Re: [gentoo-user] firefox 1.5 CPU usage - is it normal?

[Alexander Kirillov]

>> Pango is enabled by default in Firefox 1.5.
>> export MOZ_DISABLE_PANGO=1 and try again.

> Wow. Thanks a lot, I missed that post in the forums.
> It seems to make a difference.
> Why does Pango support cripple the thing?

AFAIK it's supposed to be capable of rendering some complex Asian
scripts. Unfortunately it comes with a huge performance hit.
Why? I don't know:(

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