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ResearchSeptember 22, 2026

RBS-Attention: Radius-Bounded Sparse Prefill for Long-Context Large Language Models

Long-context large language model inference is increasingly limited by prefill, where dense self-attention processes the entire prompt before generation begins. Sparse block selection can reduce this cost, but a block centroid may hide a highly relevant token among many…

Chuxu Song, Jiuqi Wei, Zhencan Peng·arXiv — cs.AI
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Key Takeaways
  • 01.Long-context large language model inference is increasingly limited by prefill, where dense self-attention processes the entire prompt before generation begins
  • 02.Sparse block selection can reduce this cost, but a block centroid may hide a highly relevant token among many…

This material is provided as an extended analytical summary.

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