temporary performance issues when prism.dirtyopts set to false

[Pavel Safrata]

Thanks!
Pavel

On 7.6.2012 8:44, Jose Martinez wrote:
> Jira 22127 and 22126 created.
> jose
> ------------------------------------------------------------------------
> *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!
> jose
>
>
> ________________________________
> 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 
> false
>
> 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?
> Thanks,
> Pavel
>
> 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 
> [1]. 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.
> >
> > [1] 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
>
>