Hi Praveen,
On Fri, 2006-06-30 at 16:48 +0530, Praveen Bhaniramka wrote:
> Happy Friday everyone!
>
> I have been trying to benchmark the scene graph loading performance for
> OpenSG and comparing that to Optimizer's loading performance. For the
> data sets I have tested (converted from VRML), I see a considerable
> performance difference between the CSB and BIN/OSG loading times (CSB
> from Optimizer being faster). Is this expected? The file size for CSB is
> a little more than the BIN file size, so disk IO is probably not the
> issue. I assume that the overhead is somehow in the scene graph
> construction step itself.
>
> Do folks have any thoughts on this? Are there any RFE's for improving
> this further?
BIN is outdated and should not be used anymore.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.
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.
How much of a difference are we talking here anyway? 10% or a factor of
10?
Hope it helps
Dirk
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