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Get More with LESS: Synthesizing Recurrence with KV Cache Compression for Efficient LLM Inference

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arxiv 2402.09398 v2 pith:QGEUKG3Z submitted 2024-02-14 cs.LG cs.AI

Get More with LESS: Synthesizing Recurrence with KV Cache Compression for Efficient LLM Inference

classification cs.LG cs.AI
keywords cachelesscomputationaldecodingefficientlargememorymethods
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Many computational factors limit broader deployment of large language models. In this paper, we focus on a memory bottleneck imposed by the key-value (KV) cache, a computational shortcut that requires storing previous KV pairs during decoding. While existing KV cache methods approach this problem by pruning or evicting large swaths of relatively less important KV pairs to dramatically reduce the memory footprint of the cache, they can have limited success in tasks that require recollecting a majority of previous tokens. To alleviate this issue, we propose LESS, a simple integration of a (nearly free) constant sized cache with eviction-based cache methods, such that all tokens can be queried at later decoding steps. Its ability to retain information throughout time shows merit on a variety of tasks where we demonstrate LESS can help reduce the performance gap from caching everything, sometimes even matching it, all while being efficient. Relevant code can be found at https://github.com/hdong920/LESS.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Tensor Cache: Eviction-conditioned Associative Memory for Transformers

    cs.LG 2026-05 unverdicted novelty 7.0

    Tensor Cache augments sliding-window attention with an eviction-fed outer-product associative memory and a training correction to improve long-context performance under bounded memory.

  2. From Tensor Buffer to Distributed Memory Hierarchy: A Survey of KV Cache Management for LLM Serving

    cs.DC 2026-06 accept novelty 6.5

    KV-cache serving systems concentrate into five archetypes under a four-axis taxonomy, with ownership explaining residual distributed design variance and seven measurement gaps blocking next steps.

  3. PyramidKV: Dynamic KV Cache Compression based on Pyramidal Information Funneling

    cs.CL 2024-06 conditional novelty 6.0

    PyramidKV dynamically compresses KV cache across layers following pyramidal information funneling, matching full performance at 12% retention and outperforming alternatives at 0.7% retention with up to 20.5 accuracy gains.

  4. Predict, Reuse, and Repair: Accelerating Dynamic Sparse Attention for Long-Context LLM Decoding

    cs.LG 2026-06 conditional novelty 5.0

    PRR accelerates dynamic sparse attention decoding in long-context LLMs via EMA-based prediction, speculative attention, and FlashAttention repair, achieving up to 40% latency reduction.

  5. GLIDE: Guided Layerwise Hybrid Attention for Efficient LLM Inference

    cs.AI 2026-06 reject novelty 4.0

    GLIDE allocates softmax attention only to early/middle transformer layers and linearizes later layers, cutting KV-cache I/O by up to ~62× while retaining 92–96% of baseline accuracy.