ChunkKV Semantic Chunk Preservation and Accuracy in Needle-in-a-Haystack Benchmark

Abstract

Abstract: Large Language Models (LLMs) require significant GPU memory when processing long texts, with the key value (KV) cache consuming up to 70\% of total memory during inference. Although existing compression methods reduce memory by evaluating the importance of individual tokens, they overlook critical semantic relationships between tokens, resulting in fragmented context and degraded performance. We introduce ChunkKV, which fundamentally reimagines KV cache compression by treating semantic chunks - rather than isolated tokens - as basic compression units. This approach preserves complete linguisti

Research Question

How does ChunkKV's semantic chunk preservation impact accuracy on the Needle-in-a-Haystack benchmark compared to token-level eviction policies across context lengths exceeding 100k tokens?

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