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Position Bias Correction is Insufficient for One-Pass Attention Sorting

paperactiveprovisionalposition-bias-correction-is-insufficient-for-one-pass-attention-sorting-ca84eb4d·1 events·first seen 41h ago

Aliases: Position Bias Correction is Insufficient for One-Pass Attention Sorting

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4arXiv · cs.CL·41h ago·source ↗

Debiased One-Pass Attention Sorting fails to close gap with iterative sorting for long-context LLMs

A new arXiv preprint investigates whether position bias is the primary bottleneck in long-context LLM performance, proposing Debiased One-Pass Attention Sorting as a cheaper alternative to iterative Attention Sorting. Experiments on LLaMA-2-7B-32K-Instruct and YaRN-Llama-2-7b-64k show that bias correction alone is insufficient: on one model it provides no improvement over uncalibrated single-pass sorting, and on the other it closes only 37% of the gap to iterative sorting. The findings suggest that iterative reordering provides benefits beyond position-bias correction, leaving the efficiency-accuracy tradeoff unresolved.