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List:       kde-devel
Subject:    Re: KHTML memory usage.
From:       Oliver Stieber <oliver_stieber () yahoo ! co ! uk>
Date:       2005-06-17 13:08:02
Message-ID: 20050617130802.45733.qmail () web26206 ! mail ! ukl ! yahoo ! com
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--- David Faure <faure@kde.org> wrote:

> On Friday 17 June 2005 14:35, Oliver Stieber wrote:
> > Hi, 
> > 
> > I've been thinking about trying to put some
> > improvements into KHTML and was wondering if
> anyone
> > knows.
> > 
> > a: The difference between the page content size as
> > downloaded and the memory used by KHTML to render
> the
> > page.
> 
> DOM tree and render tree are quite different
> structures than the html text
> we get as input.

Yes, but is the dom significantly larger than the html
text.

I also assume that images aren't kept in jpeg format
and there are are a number of layout hints stored
about the visible page.

> 
> > b: How easy it would be to drop pages the rendered
> and
> > only hold the downloaded content of pages that
> haven't
> > been viewed for a while or when memory starts
> getting tight.
> 
> And just how would KHTML be able to repaint the
> page, if it doesn't
> have the DOM tree and render tree around anymore?
> 

Exactly the same way it did the first time, using the
HTML text and jpg images that were downloaded and are
cached.

At the moment something like this happens:

page.content = download(url)
khtml.dom = new Dom(page.content)

But I want to add two other functions:

if (running out of memory and page isn't displayed)
then
delete khtml.dom
khtml.dom = null


if (page in view and dom == NULL)
khtml.dom = new Dom(page.content)



> -- 
> David Faure, faure@kde.org, sponsored by Trolltech
> to work on KDE,
> Konqueror (http://www.konqueror.org), and KOffice
> (http://www.koffice.org).
> 
>  
> >> Visit
> http://mail.kde.org/mailman/listinfo/kde-devel#unsub
> to unsubscribe <<
> 



		
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