Google Research published TurboQuant on Tuesday, a training-free compression algorithm that quantizes LLM KV caches down to 3 bits without any loss in model accuracy. In benchmarks on Nvidia H100 GPUs, 4-bit TurboQuant delivered up to an eight-times performance increase in computing attention logits compared to unquantized 32-bit keys, while reducing KV cache memory by at least six times.
KV caches store previously computed attention data so that LLMs don’t have to recompute it at each token…

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