How to speed up video generation without sacrificing quality?

Video diffusion transformers produce stunning results but are computationally expensive. PARE uses two complementary tricks: it prunes less-important attention heads while protecting temporal connections critical for motion, and trains a lightweight router that decides which processing blocks to skip at each denoising step based on current content. Tests on Wan2.1-14B show substantial speedup with no visible quality loss across standard video benchmarks.