Why is there no backward for spspmm in the latest version?

[empty-id]

https://github.com/rusty1s/pytorch_sparse/blob/master/torch_sparse/spspmm.py

[rusty1s]

It was removed in version 0.5.1 since the implementation was kinda slow, but I have plans to bring it back ASAP.

[xuzijian629]

I'm looking forward to seeing this feature soon :)

[jlevy44]

Any updates on this feature?

[rusty1s]

Not yet, sorry for the delay.

[rob-kwiec]

Hi! Any updates on it? Is there any other efficient way to do spspmm with autograd?
I tried using torch.sparse.mm, but didn't manage to do it efficiently. Here I posted a question on StackOverflow about it - maybe someone from here could help?