Hi Dirk,

> BIN is outdated and should not be used anymore. It is a 
> little bigger than OSB, but it is much too brittle to be very 
> useful, we strongly recommend using OSB only.

I tried using OSG as well. As you mention, the file size was smaller
than BIN. However, the data load was even slower than BIN!!! 

> That said, OSB in general loads very fast. The only thing I 
> can think of that might slow things down is that by default 
> some basic optimizations (striping etc.) are run on every 
> loaded model. You can deactivate (or
> change) that by giving an optional parameter to 
> SceneFileHandler::read(). That parameter is the 
> GraphOpSequence to be run after loaded, or NULL.

Hmm... That is probably what is going on. Let me try your suggestion and
report back on what I am getting (probably on Monday - I am travelling
over the weekend). 

> How much of a difference are we talking here anyway? 10% or a 
> factor of 10?

It was more like 4-5x higher with OpenSG. Let me try the above and get
back to you. BTW, is there a repository for large VRML data models that
I can use for my benchmarks? Something from the CAD space would be
preferable. I am currently using PDB (Protein data models) that I
convert to VRML and then use in my test app. However, this might not be
very exciting/convincing for our client :( The data contains a TONNE of
small spheres in 3D space connected by Cylinders and might be messing
with the Graph Optimization algorithm that OpenSG uses. 

- Praveen


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