DeepSeek Sparse Attention

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papersSEP 11 04:00 UTC

HISA: Hierarchical Indexing Method for Fine-Grained Sparse Attention

A new arXiv paper proposes HISA, a hierarchical indexing approach for token-level sparse attention of the kind used in DeepSeek Sparse Attention. Such methods score every past key with a lightweight indexer before running attention on a selected subset, which becomes costly as context grows. HISA aims to make that key-selection step more efficient while keeping fine-grained selection quality.

sparse-attention/efficiency/research/llm