Enable memmap to create empty files with non-native byte order. Deprecate Python 3.9, support Python 3.13. TIFF, the Tagged Image File Format, was created by the Aldus Corporation and Adobe Systems ...

(1) We released the 50 diffusion steps model (instead of 1000 steps) which runs 20X faster with comparable results. (2) Calling CLIP just once and caching the result runs 2X faster for all models.