temporary performance issues when prism.dirtyopts set to false
pavel.safrata at oracle.com
Wed Jun 6 23:45:46 PDT 2012
On 7.6.2012 8:44, Jose Martinez wrote:
> Jira 22127 and 22126 created.
> *From:* Jose Martinez <jmartine_1026 at yahoo.com>
> *To:* Pavel Safrata <pavel.safrata at oracle.com>;
> "openjfx-dev at openjdk.java.net" <openjfx-dev at openjdk.java.net>
> *Sent:* Thursday, June 7, 2012 2:10 AM
> *Subject:* Re: temporary performance issues when prism.dirtyopts set
> to false
> Ok I follow, that's a good point. Will fill two out for the problems
> I am seeing when ditryopts is set to true.... didn't realize ditryopts
> set to false is only for testing.
> Thank you!
> From: Pavel Safrata <pavel.safrata at oracle.com
> <mailto:pavel.safrata at oracle.com>>
> To: openjfx-dev at openjdk.java.net <mailto:openjfx-dev at openjdk.java.net>
> Sent: Thursday, June 7, 2012 1:58 AM
> Subject: Re: temporary performance issues when prism.dirtyopts set to
> Hi Jose,
> Jonathan is absolutely right. Disabling dirty opts is a good tool for
> narrowing the problem, but you should never want to do it for public
> use. The performance is significantly worse and will always be. The
> application must render the same screens with and without dirty opts and
> if it doesn't, there is a bug in FX that needs to be fixed immediately.
> Could you please file one?
> On 7.6.2012 6:21, Jose Martinez wrote:
> > Thanks for the response. Please note that the poor performance is
> only temporary, during the first minute of game play. So I suspect
> there is hope to obtain good performance for the whole time.
> > jose
> > ________________________________
> > From: Jonathan Giles<jonathan.giles at oracle.com
> <mailto:jonathan.giles at oracle.com>>
> > To: Jose Martinez<jmartine_1026 at yahoo.com
> <mailto:jmartine_1026 at yahoo.com>>
> > Cc: openjfx mailing list<openjfx-dev at openjdk.java.net
> <mailto:openjfx-dev at openjdk.java.net>>
> > Sent: Thursday, June 7, 2012 12:04 AM
> > Subject: Re: temporary performance issues when prism.dirtyopts set
> to false
> > I am not in the graphics team, but given the present state of
> timezones I thought I'd reply to try to give some clarity. Hopefully
> someone will follow this up at a more suitable hour with a correct
> answer :-)
> > Dirty opts in JavaFX is synonymous with the concept known as dirty
> rectangles, I believe. You can learn more about dirty rectangles at
> . Basically it is an optimisation designed to limit the amount of
> drawing on the screen to only the areas that have changed since the
> last update. If dirty opts are disabled, as you are doing, you are
> basically telling JavaFX to redraw the whole screen on every pulse.
> This is clearly a far more expensive operation than just drawing the
> 'dirty' areas.
> > So, in short, yes, this is a known issue with disabling dirty opts.
> Except it really isn't an issue - it is just the nature of things. The
> reason why Kevin asked for you to disable dirty opts was to try to
> trouble shoot the other issues you raised. You shouldn't go without
> dirty opts if at all possible.
> >  http://c2.com/cgi/wiki?DirtyRectangles
> > -- Jonathan
> > On 7/06/2012 3:56 p.m., Jose Martinez wrote:
> >> Hello,
> >> I notice performance issues when prism.dirtyopts is set to false.
> But it only happens during the first minute or so of game play. The
> animation is not smooth, it looks as if it has a low frame rate. But
> after a minute the animations becomes smooth for the rest of the
> program execution. The poor animation performance returns if I
> restart the application.
> >> Is this a known issue?
> >> thanks
> >> jose
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