GPU memory use on train.py

[sxdl]

Thanks for you fascinating job!
I'm trying to run the giving train code on 4060ti 16GB GPU. But it ends up with "CUDA out of memory". I wonder how large will the memory be enough to run the train.py code? I noticed that in #13 it was mentioned that it took a little GPU memory. or is there some magic that can optimize the GPU memory use?
Thank you!