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A video diffusion model runs out of memory on longer clips. What does sequence parallelism save, and what does it cost?

Start from latent patches, then count attention pairs and communication per denoising step. Separate sharded activations from replicated weights and exact distributed attention from stale-feature approximations.

Updated Nov 2026 · Worked answers on inference mechanisms, with calculations, implementation details, and follow-up questions.

Start from latent patches, then count attention pairs and communication per denoising step. Separate sharded activations from replicated weights and exact distributed attention from stale-feature approximations.

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