How to train this model with my own data?

[Red-Fairy]

I have a unpaired dataset and I would like to perform image-to-image translation through this model, I tested both disk and lmdb mode, but I found both methods are time consuming and most of the time is spent on loading data instead of computing. I believe I've got something wrong. So what is the simplest way to train this model with my own data?

[JesseZhang84]

Hello, I also want to train my own data, Want to ask if the test set must use paired data？What kind of test set should I use if not？Thank you very much！