[webkit-qt] webkit performance issue

[Benjamin Poulain]

On 01/04/2011 09:59 PM, ext Mandaya Prakash wrote:
> I am facing some terrible performance problem with Qt webkit based
> application on our board. Indeed I build Qt Demo Browser application for
> my board and it has
> terrible terrible slow performance. It is highly un responsive, when
> scroll using mouse it scrolls very little after almost two min, when I
> click on any link
> it opens that link after a minute, When I go to some site like cnn.com
> <http://cnn.com/> and do little browsing it crashes. I am running with
> directfb support.
>
> I have tested other web kit based small browser sort of application and that
> works good.
>
> To me it looks like some issue with Qt porting of webkit or in Demo browser
> but I have no clue what is causing this problem.
>
> Can any one please point me what should I look for to solve this problem?
> any hint will be highly appreciated.

It would be hard to tell what is the problem without more specific 
information.

Have you tried oprofile on the device to find which functions are taking 
most of the time?

You can also look at the benchmarks we have 
http://gitorious.org/qtwebkit/performance to evaluate what is slow. For 
example, the benchmark tests/scrolling gives good results on embedded.

You should also measure how long it take to render a screen on a QImage. 
This could help figure if directfb is the problem or if you cpu is just 
too slow.

cheers,
Benjamin