issue of training speed

[zhimengzhou]

Hi，
When I adjust the number of sources to 5 or 6, the model training speed becomes very slow and takes many hours. Is this an increase in training time due to the normal increase in the number of sources, or is it slow due to my graphics card?
Thank you！

[aradgast]

It's a limitation of the RMSPE calculating all permutations, you could optimized it a bit on GPU by tensors operations as in here.