[maemo-developers] Browserd consumes too much CPU on N810 - OS 2008 (5.2008.43)

[From: Eero Tamminen]

Hi,

(restricted this to maemo-devel)

ext Andrea Grandi wrote:
> 2008/12/19 Ryan Abel <rabelg5 at gmail.com>:
>> On Fri, Dec 19, 2008 at 10:09 AM, Andrea Grandi <a.grandi at gmail.com> wrote:
>>> If you try to load Facebook.com website, the situation is even worse:
>>> it takes about 85% CPU simply doing nothing.
>>>
>> Is it _actually_ doing nothing, or do you just _think_ it's doing
>> nothing and, in fact, it's _actually_ running a ton of crappy
>> JavaScript and Flash applets? :)
>>
>> Have you tried turning off js and Flash and then looking at the CPU usage?
> 
> without Flash, it still takes about 60% CPU
> without JavaScript the CPU usage goes to 1% or 2%.

So JS is taking 60%... Does that happen only when Browser is visible,
or also when you've opened some other application on top of Browser?

If you have ssh connection to your device, does the CPU usage keep
up also when the screen blanks?


> I cross-posted because I don't know if this is only a user question or
> if some developer should take a look at this because it's a bug.
> Anyway I think that a faster JavaScript engine could help a lot
> reducing the CPU usage. What do you think about?

For CPU usage, yes.  For background CPU usage, there probably should
be some additional measures taken, and for the case when screen
blanks.

(I think some things like Gmail break if JS wakeups would be
completely disabled when Browser is backgrounded or screen is blanked.
JS on the www-sites is not written to be battery usage friendly.)


	- Eero