We found that library which enables to make matrice and other complex calculation using GPU: http://gpu.rocks/
Maybe this is something that BabylonJS already does but I thought it might interest you 
Have a great day everybody!
I am from time to time helping them troubleshooting issues
This is not applicable to babylon as any time you do a compute you upload to gpu and then need to download the result from it which would be way slower than our actual cpu cost.
It is great if you have a lot of them to compute in parallel which is not really our case due to the hierarchy of a scene.
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Haha BabylonJS is everywhere! 