performace issues

[alex25]

The scenegraph is graphics.

patches you had for bullet

http://code.google.com/p/bullet/source/detail?r=2300

There has been another VDrift related modification(hack). But I didn't consider it as relevant to upstream. Ironically we are not using this code path anymore. The relative speed difference is about 200-300%. In absolute values you would have < 2% physics instead of 4%. Back then I saw any performance regression as a bug.

there has been a major regression in rendering/creating the scenegraph. i looked at the numbers again on my laptop, the framerate drops from 80-90 fps at startup to <10fps with major freezes right as i turn the first corner. to me it looks like this is happening when new objects are added to the scenegraph, and this is not done very optimally. it didn't use to happen.

it's a pity because

Can you upload it to data? It would make a good benchmark even if it is unplayable.

i'm trying to get permission from the authors to convert it to vdrift. if i get it, i'll upload it even if i can't do any editing on it. i'm very busy at work today but in the next few days i will try to play with it on my desktop.

--alex--