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arXiv · 2607.09683

Ablation, Statistical Inference, and Validation for KV-Cache Compression

Paolo D'Alberto·Ashish Siarasao·Elliott Delaye·Rajeev Patwari
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Abstract

This study systematically compares Turbo-Quant and SpectralQuant KV-cache compression, evaluating non-dominated schemes, including WHT rotation with Beta Lloyd-Max and QJL, through a statistical validation methodology that separates systematic codec differences from implementation variance. Key findings reveal that while eigenbasis-based methods fail on heavy-tailed data due to covariance instability, they excel in structured regimes, with the effective semantic dimension ($d_{eff}$) adapting to calibration budgets rather than true data rank. (this is an abstract of the abstract thank you )

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Paolo D'Alberto, Ashish Siarasao, Elliott Delaye, Rajeev Patwari. 2026-06-14. Ablation, Statistical Inference, and Validation for KV-Cache Compression. https://arxiv.org/abs/2607.09683

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