[webkit-qt] [Qt] Strong performance degradation with DirectFB since r122720
jocelyn.turcotte at nokia.com
jocelyn.turcotte at nokia.com
Fri Sep 14 06:35:39 PDT 2012
Why was it necessary to switch from QPixmap to QImage?
I don't think that this can be solved on the Qt side, it's a design advantage that QPixmap has in this kind of situations.
As far as I know this might be mostly related to reusing a graphics buffer that already has been uploaded to graphics memory.
Jocelyn
________________________________________
From: webkit-qt-bounces at lists.webkit.org [webkit-qt-bounces at lists.webkit.org] on behalf of ext Zoltan Horvath [zoltan at webkit.org]
Sent: Friday, September 14, 2012 3:17 PM
To: webkit-qt at lists.webkit.org
Subject: Re: [webkit-qt] [Qt] Strong performance degradation with DirectFB since r122720
Hi there,
Shouldn't we report this on Qt-side instead?
Cheers,
Zoltan
On Fri, 14 Sep 2012 15:02:13 +0200, Allan Sandfeld Jensen
<kde at carewolf.com> wrote:
> On Friday 14 September 2012, Brianceau, Julien wrote:
>> With r126284 based webkit version, I get 11,3 displayed fps, with a CPU
>> usage of more than 95% With r126284 based webkit version with changeset
>> 122720 reverted, I get 25,6 displayed fps, with a CPU usage of about 90%
>>
> Yes with a 50% speed regression also on Qt5, I think we need to revert
> the
> patch in trunk, otherwise I would have suggested only reverting it in
> QtWebKit
> 2.3. But having as few difference as possible is better, so I am actually
> relieved it was also slower in Qt5.
>
> Cheers
> `Allan
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