KVBoost cuts LLM time-to-first-token 4.49x with no accuracy loss
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KVBoost cuts time-to-first-token by 4.49x (142.4 ms vs. 639.1 ms) by enabling key-value cache reuse for arbitrary prompt chunks, not just shared prefixes. This lets production systems handle diverse, non-contiguous repeated content—like code snippets across bug reports—without recomputing KV tensors, while maintaining accuracy and staying memory-bounded through selective recomputation and quantization.
KVBoost cuts time-to-first-token on Qwen2.5-3B from 639.1 ms to 142.4 ms by reusing KV cache at arbitrary chunk positions instead of only shared prompt prefixes. For production inference, this means workloads with repeated boilerplate, retrieved context, code, or logs can get prefix-cache-like prefill savings even when shared text is reordered or embedded mid-prompt, with repair recomputation and KV quantization keeping accuracy and memory bounded.