First-Order Diffusion Samplers Can Be Fast
Analysis
Key Takeaways
- •Challenges the dominance of higher-order ODE solvers for DPM sampling speed.
- •Proposes a novel, training-free, first-order sampler.
- •Demonstrates competitive or superior performance compared to higher-order samplers on image generation benchmarks.
- •Highlights the importance of DPM evaluation placement for sampling accuracy.
“The proposed sampler consistently improves sample quality under the same NFE budget and can be competitive with, and sometimes outperform, state-of-the-art higher-order samplers.”