Efficient Diffusion Models: A Survey. - Hui Shen; Jingxuan Zhang; Boning Xiong; Rui Hu; Shoufa Chen; Zhongwei Wan; Xin Wang 120; Yu Zhang 133; Zixuan Gong; Guangyin Bao; Chaofan Tao; Yongfeng Huang; et al. (Trans. Mach. Learn. Res., 2025)