[webkit-dev] parallel rendering in WebKit

Holger Freyther zecke at selfish.org
Sat Feb 20 04:07:55 PST 2010

On Friday 19 February 2010 23:36:26 Zoltan Herczeg wrote:
> Hi,
> as all of you probably know, smp based systems are getting widespread even
> in the embedded domain, and we hope we can speed up webkit on these
> systems. We did some profiling, and seemed the platform dependent
> rendering took 50% of the total runtime (at least on our test platforms).
> We are thinking about adding some parallel rendering support for WebKit,
> probably mostly platform dependent code, but the threading support could
> be reused by different ports.

Hi Zoltan,

two questions. I assume you have done all your profiling with QtWebKit? And you 
are measuring (looking at total cumulative) everything under the paintEvent of 

My initial reaction to multi threaded painting is, why don't we fix the obvious 
performance bottlenecks in Qt first? Would it be much work to verify your 
profiling results in WebKit/GTK+ or Chromium? My assumption/guess is that you 
will see quite some different numbers.


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