Thanks a lot. If you need any help from me (create bug in bugs.webkit.org, create patch etc ...) please feel free to ask,
Cheers, Julien -----Message d'origine----- De : [email protected] [mailto:[email protected]] De la part de Zoltan Horvath Envoyé : vendredi 14 septembre 2012 16:25 À : [email protected]; [email protected] Objet : Re: [webkit-qt] [Qt] Strong performance degradation with DirectFB since r122720 Okay, then it seems reasonable to roll it out, so I'm going to revert it next week. Zoltan On Fri, 14 Sep 2012 16:12:00 +0200, <[email protected]> wrote: > Forget my last comment, this seems to be directly related to the use of > QImage instead of QPixmaps. > > The directfb platform plugin uses QBlitterPaintEngine which handles > drawPixmap in QDirectFbBlitter::drawPixmap rather than using straight > CPU raster for drawImage. > > ________________________________________ > From: [email protected] > [[email protected]] on behalf of Turcotte Jocelyn > (Nokia-MP/Oslo) > Sent: Friday, September 14, 2012 3:53 PM > To: [email protected]; [email protected] > Subject: Re: [webkit-qt] [Qt] Strong performance degradation with > DirectFB since r122720 > > Ahh it's a canvas test, this might also be related to the deep-copy > protection that was removed in the patch, when a QPainter is beginning > on an existing image. > > ________________________________________ > From: [email protected] > [[email protected]] on behalf of Turcotte Jocelyn > (Nokia-MP/Oslo) > Sent: Friday, September 14, 2012 3:35 PM > To: [email protected]; [email protected] > Subject: Re: [webkit-qt] [Qt] Strong performance degradation with > DirectFB since r122720 > > 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: [email protected] > [[email protected]] on behalf of ext Zoltan Horvath > [[email protected]] > Sent: Friday, September 14, 2012 3:17 PM > To: [email protected] > 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 > <[email protected]> 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 >> _______________________________________________ >> webkit-qt mailing list >> [email protected] >> http://lists.webkit.org/mailman/listinfo/webkit-qt > _______________________________________________ > webkit-qt mailing list > [email protected] > http://lists.webkit.org/mailman/listinfo/webkit-qt > _______________________________________________ > webkit-qt mailing list > [email protected] > http://lists.webkit.org/mailman/listinfo/webkit-qt > _______________________________________________ > webkit-qt mailing list > [email protected] > http://lists.webkit.org/mailman/listinfo/webkit-qt _______________________________________________ webkit-qt mailing list [email protected] http://lists.webkit.org/mailman/listinfo/webkit-qt ________________________________ This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the [email protected] and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. An NDS Group Limited company. www.nds.com _______________________________________________ webkit-qt mailing list [email protected] http://lists.webkit.org/mailman/listinfo/webkit-qt
