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HISA: Efficient Hierarchical Indexing for Fine-Grained Sparse Attention

Xu, Yufei et al.
arXiv (All) · Papers
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artificial-intelligencemachine-learning
Token-level sparse attention mechanisms, exemplified by DeepSeek Sparse Attention (DSA), achieve fine-grained key selection by scoring every historical key for each query through a lightweight indexer, then computing attention only on the selected subset. While the downstream sparse attention itself
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