he GPU when its forward
method is called, and the model remains in GPU until the next model runs. Memory savings are lower than with
enable_sequential_cpu_offload, but performance is much better due to the iterative execution of the unet.  prepare_latents  < source > ( batch_size num_channels_latents height width dtype device generator latents = None  )     enable_fuser  < source > ( enabled = True  )     encode_prompt  < source > ( prompt devi