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Fixed State, Long Reach: What a Constant-Size Cache Buys Block Diffusion at Scale

Singh, Vaibhav et al.
arXiv (All) · Papers
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Diffusion language models decode tokens in parallel, but their bidirectional denoiser rules out the naive key--value (KV) cache behind fast autoregressive inference. Block diffusion restores caching by decoding block-by-block, and the block caches deployed on it so far are tied to attention: O(L)in
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