Prob：The graphics program developed using Coin3D as the engine and the rendering frame rate becomes lower on newer NVIDIA graphics cards.

[dagunliyu]

Hey experts, I have a question to consult. We are testing a graphics program developed using Coin3D as the engine and found that the rendering frame rate becomes lower on newer graphics cards.

Quantity of Render:
We render mesh models in wireframe mode, with one SoGroup containing one SoCoordinate3 and one SoIndexedLineSet. The SoCoordinate3 contains 7.2 million vertices, and the SoIndexedLineSet contains 15 million edges.

Test Data:
The frame rate and GPU data are as follows:
• The same Coin3D-based graphics program runs at 17fps on a GeForce GT 730 , with GPU utilization over 80% .
• On a Quadro P4000 , it runs at 3fps , with GPU utilization below 20% .
• On an Quadro RTX 4000 , it runs at 1fps , with GPU utilization below 13% .

Some findings:
Additionally, we noticed another phenomenon:
A colleague modified a compatibility-related parameter (similar to something in Qt's OpenGLWidget context or enabled via glEnable), but he forgot what it was....
Currently, the issue is that rendering the model is quite laggy. However, if we move the model out of the screen/viewport area and then bring it back, the frame rate for rotating the model increases to around 50fps on Quadro P4000.

Help:
I’d like to ask if any experts know whether this is a graphics driver issue, and how we can modify the code or parameters to optimize Coin3D's rendering performance on professional graphics cards?