uan Li, and Jun Zhu. DPMSolver (and the improved version DPMSolver++) is a fast dedicated high-order solver for diffusion ODEs with convergence order guarantee. Empirically, DPMSolver sampling with only 20 steps can generate high-quality
samples, and it can generate quite good samples even in 10 steps. The original implementation can be found at LuChengTHU/dpm-solver.  Tips It is recommended to set solver_order to 2 for guide sampling, and solv