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We introduce Reward-Guided Speculative Decoding (RSD), a novel framework aimed at improving the efficiency of inference in large language models (LLMs). RSD synergistically combines a lightweight draft model with a more powerful target…

Computation and Language · Computer Science 2025-06-27 Baohao Liao , Yuhui Xu , Hanze Dong , Junnan Li , Christof Monz , Silvio Savarese , Doyen Sahoo , Caiming Xiong

Speculative decoding (SD) has become a standard technique for accelerating LLM inference without sacrificing output quality. Recent advances in speculative decoding have shifted from sequential chain-based drafting to tree-structured…

Computation and Language · Computer Science 2026-01-13 Tianyu Liu , Qitan Lv , Yuhao Shen , Xiao Sun , Xiaoyan Sun

Large Language Model (LLM)-based generative recommendation has achieved notable success, yet its practical deployment is costly particularly due to excessive inference latency caused by autoregressive decoding. For lossless LLM decoding…

Information Retrieval · Computer Science 2025-02-27 Xinyu Lin , Chaoqun Yang , Wenjie Wang , Yongqi Li , Cunxiao Du , Fuli Feng , See-Kiong Ng , Tat-Seng Chua

Speculative decoding is an effective method for accelerating inference of large language models (LLMs) by employing a small draft model to predict the output of a target model. However, when adapting speculative decoding to domain-specific…

Computation and Language · Computer Science 2025-03-27 Fenglu Hong , Ravi Raju , Jonathan Lingjie Li , Bo Li , Urmish Thakker , Avinash Ravichandran , Swayambhoo Jain , Changran Hu

We present Recurrent Drafter (ReDrafter), an advanced speculative decoding approach that achieves state-of-the-art speedup for large language models (LLMs) inference. The performance gains are driven by three key aspects: (1) leveraging a…

Computation and Language · Computer Science 2024-12-17 Yunfei Cheng , Aonan Zhang , Xuanyu Zhang , Chong Wang , Yi Wang

Speculative Decoding (SD) is a key technique for accelerating Large Language Model (LLM) inference, but it typically requires training a draft model on a large dataset. We approach this problem from a data-centric perspective, finding that…

Computation and Language · Computer Science 2026-02-19 Jiaming Fan , Daming Cao , Xiangzhong Luo , Jiale Fu , Chonghan Liu , Xu Yang

Speculative decoding (SD) accelerates large language model inference by employing a faster draft model for generating multiple tokens, which are then verified in parallel by the larger target model, resulting in the text generated according…

Large language model (LLM)-based generative list-wise recommendation has advanced rapidly, but decoding remains sequential and thus latency-prone. To accelerate inference without changing the target distribution, speculative decoding (SD)…

Information Retrieval · Computer Science 2026-05-01 Jiaju Chen , Chongming Gao , Chenxiao Fan , Haoyan Liu , Qingpeng Cai , Peng Jiang , Xiangnan He

Speculative decoding enhances the inference efficiency of large language models (LLMs) by generating drafts using a small draft language model (DLM) and verifying them in batches with a large target language model (TLM). However, adaptive…

Hardware Architecture · Computer Science 2026-05-01 Ma Zirui , Fan Zhihua , Li Wenxing , Wu Haibin , Zhang Fulin , Ye Xiaochun , Li Wenming

Speculative decoding accelerates Large Language Model (LLM) inference by using a small draft model to predict multiple tokens, and a large target model to verify these tokens in parallel. Recent studies leverage the hidden state of the…

Computation and Language · Computer Science 2025-06-05 Langlin Huang , Chengsong Huang , Jixuan Leng , Di Huang , Jiaxin Huang

Optimizing inference for long-context large language models (LLMs) is increasingly important due to the quadratic compute and linear memory cost of Transformers. Existing approximate inference methods, including key-value (KV) cache…

Computation and Language · Computer Science 2026-02-03 Kevin Galim , Ethan Ewer , Wonjun Kang , Minjae Lee , Hyung Il Koo , Kangwook Lee

Speculative decoding accelerates LLM inference by verifying candidate tokens from a draft model against a larger target model. Recent judge decoding boosts this process by relaxing verification criteria by accepting draft tokens that may…

Computation and Language · Computer Science 2026-05-28 Kanghoon Yoon , Minsub Kim , Sungjae Lee , Joonhyung Lee , Sunghyeon Woo , Yeonjun In , Se Jung Kwon , Chanyoung Park , Dongsoo Lee

Large Language Models (LLMs) enable various applications on edge devices such as smartphones, wearables, and embodied robots. However, their deployment often depends on expensive cloud-based APIs, creating high operational costs, which…

Robotics · Computer Science 2025-05-29 Yeshwanth Venkatesha , Souvik Kundu , Priyadarshini Panda

The growth in the number of parameters of Large Language Models (LLMs) has led to a significant surge in computational requirements, making them challenging and costly to deploy. Speculative decoding (SD) leverages smaller models to…

Computation and Language · Computer Science 2025-04-04 Matthieu Zimmer , Milan Gritta , Gerasimos Lampouras , Haitham Bou Ammar , Jun Wang

Speculative decoding significantly accelerates language model inference by enabling a lightweight draft model to propose multiple tokens that a larger target model verifies simultaneously. However, applying this technique to vision-language…

Machine Learning · Computer Science 2025-05-20 Mugilan Ganesan , Shane Segal , Ankur Aggarwal , Nish Sinnadurai , Sean Lie , Vithursan Thangarasa

Accelerating inference in Large Language Models (LLMs) is critical for real-time interactions, as they have been widely incorporated into real-world services. Speculative decoding, a fully algorithmic solution, has gained attention for…

Computation and Language · Computer Science 2025-02-11 Sukmin Cho , Sangjin Choi , Taeho Hwang , Jeongyeon Seo , Soyeong Jeong , Huije Lee , Hoyun Song , Jong C. Park , Youngjin Kwon

Constrained decoding with lookahead heuristics (CDLH) is a highly effective method for aligning LLM generations to human preferences. However, the extensive lookahead roll-out operations for each generated token makes CDLH prohibitively…

Computation and Language · Computer Science 2025-02-12 Nishanth Nakshatri , Shamik Roy , Rajarshi Das , Suthee Chaidaroon , Leonid Boytsov , Rashmi Gangadharaiah

Large language model (LLM) inference at the network edge is a promising serving paradigm that leverages distributed edge resources to run inference near users and enhance privacy. Existing edge-based LLM inference systems typically adopt…

Systems and Control · Electrical Eng. & Systems 2025-10-14 Bingjie Zhu , Zhixiong Chen , Liqiang Zhao , Hyundong Shin , Arumugam Nallanathan

Although current Video-LLMs achieve impressive performance in video understanding tasks, their autoregressive decoding efficiency remains constrained by the massive number of video tokens. Visual token pruning can partially ease this…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Quan Kong , Yuhao Shen , Yicheng Ji , Huan Li , Cong Wang

Speculative decoding accelerates LLMs by using a lightweight draft model to generate tokens autoregressively before verifying them in parallel with a larger target model. However, determining the optimal number of tokens to draft remains a…

Machine Learning · Computer Science 2025-11-05 Aditya Sridhar , Nish Sinnadurai , Sean Lie , Vithursan Thangarasa