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VL-Cache: Sparsity and Modality-Aware KV Cache Compression for Vision-Language Model Inference Acceleration

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arxiv 2410.23317 v1 pith:GHVQD25N submitted 2024-10-29 cs.CV cs.AIcs.CLcs.DCcs.PF

VL-Cache: Sparsity and Modality-Aware KV Cache Compression for Vision-Language Model Inference Acceleration

classification cs.CV cs.AIcs.CLcs.DCcs.PF
keywords cacheaccuracycompressionvlmsacceleratingacrossbenchmarkbudget
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Vision-Language Models (VLMs) have demonstrated impressive performance across a versatile set of tasks. A key challenge in accelerating VLMs is storing and accessing the large Key-Value (KV) cache that encodes long visual contexts, such as images or videos. While existing KV cache compression methods are effective for Large Language Models (LLMs), directly migrating them to VLMs yields suboptimal accuracy and speedup. To bridge the gap, we propose VL-Cache, a novel KV cache compression recipe tailored for accelerating VLM inference. In this paper, we first investigate the unique sparsity pattern of VLM attention by distinguishing visual and text tokens in prefill and decoding phases. Based on these observations, we introduce a layer-adaptive sparsity-aware cache budget allocation method that effectively distributes the limited cache budget across different layers, further reducing KV cache size without compromising accuracy. Additionally, we develop a modality-aware token scoring policy to better evaluate the token importance. Empirical results on multiple benchmark datasets demonstrate that retaining only 10% of KV cache achieves accuracy comparable to that with full cache. In a speed benchmark, our method accelerates end-to-end latency of generating 100 tokens by up to 2.33x and speeds up decoding by up to 7.08x, while reducing the memory footprint of KV cache in GPU by 90%.

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Forward citations

Cited by 9 Pith papers

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

  1. AURA: Action-Gated Memory for Robot Policies at Constant VRAM

    cs.AI 2026-06 unverdicted novelty 7.0

    AURA-Mem uses an action-gated recurrent memory trained on closed-loop action error to deliver constant 4,224-byte state and 5-9x fewer writes than baselines while matching base policy success on LIBERO-Long.

  2. AsymVLM: Asymmetric Token Pruning for Efficient Vision-Language Model Inference

    cs.LG 2026-05 unverdicted novelty 7.0

    AsymVLM introduces asymmetric token pruning for vision and text in VLMs to deliver up to 54% FLOPs reduction while matching or exceeding prior methods on localized visual tasks.

  3. Rotation-Aligned Key Channel Pruning for Efficient Vision-Language Model Inference

    cs.CV 2026-05 unverdicted novelty 7.0

    RotateK uses online PCA-based rotation to align token-dependent key channel importance into a shared subspace, enabling accurate head-wise structured pruning and faster decoding in VLMs compared to prior token or chan...

  4. Prefill-Time Intervention for Mitigating Hallucination in Large Vision-Language Models

    cs.CV 2026-04 conditional novelty 7.0

    Prefill-Time Intervention (PTI) reduces hallucinations in large vision-language models by applying a one-time modality-aware steering correction to the initial KV cache at the prefill stage rather than during autoregr...

  5. What to Keep, What to Forget: A Rate--Distortion View of Memory Compaction in LLMs and Agents

    cs.LG 2026-07 conditional novelty 6.0

    KV-cache eviction, prompt compression, recurrent state bounding, and agent memory consolidation are unified as one rate-distortion problem with a shared lower bound, shared failure mode, and transferable mechanisms.

  6. CIVIC: End-to-End Sequence Compactness for Efficient Vision-Language Models

    cs.AI 2026-05 unverdicted novelty 6.0

    CIVIC is a path-consistent compact visual inference framework that reduces KV-cache memory to approximately one-third and end-to-end latency in VLMs while preserving accuracy via text-aligned KL distillation and adapt...

  7. Make Each Token Count: Towards Improving Long-Context Performance with KV Cache Eviction

    cs.LG 2026-05 unverdicted novelty 6.0

    A unified learnable KV eviction policy with cross-layer calibration reduces memory and matches or exceeds full-cache performance on long-context tasks by retaining useful tokens and limiting attention dilution.

  8. FreqCache: Accelerating Embodied VLN Models with Adaptive Frequency-Guided Token Caching

    cs.RO 2026-04 unverdicted novelty 6.0

    FreqCache uses frequency domain properties to adaptively select, refresh, and budget token caches in VLN models, delivering 1.59x speedup with negligible overhead.

  9. KVCapsule: Efficient Sequential KV Cache Compression for Vision-Language Models with Asymmetric Redundancy

    cs.CV 2026-05 unverdicted novelty 5.0

    KVCapsule compresses KV cache in VLMs by 60% to deliver up to 2x higher tokens-per-second and 2.4x memory reduction with negligible accuracy loss.