E8 lattice vector quantization enables 2-bit keys for LLM KV-cache compression

Using structured 8D lattice codebooks, the method compresses keys to 2 bits while preserving attention fidelity and matching scalar decode throughput.

Academic
Sasho Nedelkoski · Alexander Acker · Soeren Becker · Dominik Scheinert · Odej Kao

Technical University of Berlin · logsight.ai

Research Digest··3 min read
The authors apply E8 lattice vector quantization (VQ) to compress key vectors in LLM KV caches to 2 bits per dimension, achieving roughly 6x total compression when combined with 2-bit values.

Nedelkoski et al.

Why this paper

From Technical University of Berlin and logsight.ai · Part of KV Cache Compression, now 13 papers

In one line

E8 lattice vector quantization with 2-bit keys and 2-bit values achieves 6x KV-cache compression while preserving near-baseline LLM quality.

What we could check

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  • ✓Limitations stated by the authors
  • ✓Reports numbers on named benchmarks (3 benchmarks)

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Research Digest

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