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Laggy plotting [message #93405]

Thu, 07 July 2016 02:21

Richard Morton
Messages: 7
Registered: April 2016

Junior Member

Hi all,

I have just upgraded my laptop and switched to El Capitan. However I seem to be having issues with plotting images in IDL8.5, in so much as even for relatively small images (600x600) I get a lag effect on plotting and I can see the image being built from the bottom up.

I am using xterm and x11 windowing.

Only my old (and supposedly worse) machine I never encountered this problem....

This may not be an IDL problem as such, but I don't use much else with x11.

It's probably something to do with buffering but any ideas what the problem could be and any solutions?

Thanks,
Rick

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Re: Laggy plotting [message #93408 is a reply to message #93405]

Thu, 07 July 2016 08:50

wlandsman
Messages: 743
Registered: June 2000

Senior Member

I assume you are using XQuartz 2.7.9? -Wayne

On Thursday, July 7, 2016 at 5:21:08 AM UTC-4, Richard Morton wrote:
> Hi all,
>
> I have just upgraded my laptop and switched to El Capitan. However I seem to be having issues with plotting images in IDL8.5, in so much as even for relatively small images (600x600) I get a lag effect on plotting and I can see the image being built from the bottom up.
>
> I am using xterm and x11 windowing.
>
> Only my old (and supposedly worse) machine I never encountered this problem....
>
> This may not be an IDL problem as such, but I don't use much else with x11.
>
> It's probably something to do with buffering but any ideas what the problem could be and any solutions?
>
> Thanks,
> Rick

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Re: Laggy plotting [message #93410 is a reply to message #93408]

Fri, 08 July 2016 01:04

Richard Morton
Messages: 7
Registered: April 2016

Junior Member

Sorry, yes I am.

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Re: Laggy plotting [message #93412 is a reply to message #93410]

Fri, 08 July 2016 07:15

Richard Morton
Messages: 7
Registered: April 2016

Junior Member

Also seems to be much worse (i.e, slower) when opening a new graphics window

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Re: Laggy plotting [message #93413 is a reply to message #93405]

Fri, 08 July 2016 08:06

Richard Morton
Messages: 7
Registered: April 2016

Junior Member

Just to let you know the problem has been fixed!

I was in contact with Harris and received this advice:

> A second change to try is the backing store preference.
> -Select Window > Preferences in IDL
> - Move to the IDL > Graphics menu on the left part of the dialog window
>
> - on the right part change the backing store from "System(1)" to "IDL(2)".
> I found a report to the developers mentioning the slowness of graphics with MAC 10.11 (which is not yet > officially supported by IDL 8.5).
> http://www.harrisgeospatial.com/Support/HelpArticlesDetail/T abId/219/ArtMID/900/ArticleID/14573/14573.aspx
> It is under investigation at development and changing the backing store property seems to improve the >behavior in many cases.
>
> Best Regards / Bien cordialement
>
> Bérangère Casson
> Senior Technical Support Engineer "

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