512x512 image from the prompt a photo of an astronaut riding a horse on mars with 50 DDIM steps on a Nvidia Titan RTX, demonstrating the speed-up you can expect as a result of reduced memory consumption.  latency speed-up original 9.50s x1 fp16 3.61s x2.63 channels last 3.30s x2.88 traced UNet 3.21s x2.96 memory-efficient attention 2.63s x3.61  Sliced VAE Sliced VAE enables decoding large batches of images with limited VRAM or batches with 32 i