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Source arXiv Computation and Language export.arxiv.org Analyst
October 15, 2026 ai_technology research

Joint Subspace Sparse Attention for Efficient Long-Context Decoding

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Overview

arXiv:2610.19026v1 Announce Type: new Abstract: Sparse attention reduces the KV-cache traffic that dominates long-context LLM decoding, but practical methods largely operate at coarse granularity. Token-level selection offers finer control, yet presents two challenges: low-dimensional scoring may lose query--key structure needed for accurate ranking, while gathering scattered selected tokens can offset the resulting latency benefit. We introduce Joint Subspace Sparse Attention (JSSA) to address

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