[osg-users] Significant drop in frame rate when updating from OSG 3.2.1 to 3.4.0

Robert Osfield robert.osfield at gmail.com
Mon Mar 20 10:08:44 PDT 2017

Hi Werner,

Hopefully others will be able to chip in as I don't have a answer right
now, it's certainly very odd.  If it were a general problem then we'd seen
lots of issue with it being reported.

With this level of slow down it's almost like your'e invoking a software
renderer when running with 3.4.0.

My next thought is that perhaps an OpenGL error is being invoked somehow.
Are there any errors being reported to the console?

What happens with the standard OSG example set?  Does osgviewer run any
differently with models you have on the two versions.


On 20 March 2017 at 15:29, Werner Modenbach <Werner.Modenbach at texion.eu>

> Hi Robert,
> I updated my project from version 3.2.1 to 3.4.0.
> I'm on Window 7 Pro.
> Unfortunately the frame rate dropped significantly from 60 fps to 2.x fps.
> I verified it several times by just linking to the 2 versions without any
> change of my code.
> Please see the 2 screen shots with the stats output.
> Do you have any idea what might be the reason for it or how I can do
> further analysis?
> Thanks for any idea.
> - Werner -
> Ich habe 2 zu dieser E-Mail gehörende Dateien hochgeladen:
> OSG 3.4.0.png <https://www.hightail.com/download/dDZFdFdRMm1veE5vZE1UQw>(727
> KB)Hightail <https://www.hightail.com>https://www.hightail.com/download/
> dDZFdFdRMm1veE5vZE1UQw
> OSG 3.2.1.png <https://www.hightail.com/download/dDZFdFdRMm1veE5jR01UQw>(628
> KB)Hightail <https://www.hightail.com>https://www.hightail.com/download/
> dDZFdFdRMm1veE5jR01UQw
> Mozilla Thunderbird <http://www.getthunderbird.com> macht es einfach,
> große Dateien über E-Mails zu teilen.
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