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LLM deployment on resource-constrained edge devices faces severe latency constraints, particularly in real-time applications where delayed responses can compromise safety or usability. Among many approaches to mitigate the inefficiencies of…

Speculative decoding is an emerging technique that accelerates large language model (LLM) inference by allowing a smaller draft model to predict multiple tokens in advance, which are then verified or corrected by a larger target model. In…

Signal Processing · Electrical Eng. & Systems 2025-11-10 Ce Zheng , Tingting Yang

Inference with modern Large Language Models (LLMs) is expensive and slow, and speculative sampling has emerged as an effective solution to this problem, however, the number of the calls to the draft model for generating candidate tokens in…

Artificial Intelligence · Computer Science 2025-12-17 Junjie Ma , Jinlong Li

Recent advancements in speculative decoding have demonstrated considerable speedup across a wide array of large language model (LLM) tasks. Speculative decoding inherently relies on sacrificing extra memory allocations to generate several…

Machine Learning · Computer Science 2025-06-04 Selin Yildirim , Deming Chen

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 can substantially accelerate LLM inference, but realizing its benefits in practice is challenging due to evolving workloads and system-level constraints. We present TIDE (Temporal Incremental Draft Engine), a…

Machine Learning · Computer Science 2026-02-06 Jiyoung Park , Hankyu Jang , Changseok Song , Wookeun Jung

Agentic multimodal large language models (MLLMs) (e.g., OpenAI o3 and Gemini Agentic Vision) achieve remarkable reasoning capabilities through iterative visual tool invocation. However, the cascaded perception, reasoning, and tool-calling…

Computer Vision and Pattern Recognition · Computer Science 2026-03-25 Haoyu Huang , Jinfa Huang , Zhongwei Wan , Xiawu Zheng , Rongrong Ji , Jiebo Luo

Speculative decoding (SD) has become a popular technique to accelerate Large Language Model (LLM) inference, yet its real-world effectiveness remains unclear as prior evaluations rely on research prototypes and unrealistically small batch…

Computation and Language · Computer Science 2026-03-19 Xiaoxuan Liu , Jiaxiang Yu , Jongseok Park , Ion Stoica , Alvin Cheung

We propose Speculative Decoding (SpecDec), for the first time ever, to formally study exploiting the idea of speculative execution to accelerate autoregressive (AR) decoding. Speculative Decoding has two innovations: Spec-Drafter -- an…

Computation and Language · Computer Science 2023-10-31 Heming Xia , Tao Ge , Peiyi Wang , Si-Qing Chen , Furu Wei , Zhifang Sui

Speculative decoding (SD) accelerates large language model (LLM) reasoning by using a small draft model to generate candidate tokens, which the target LLM either accepts directly or regenerates upon rejection. However, excessive alignment…

Computation and Language · Computer Science 2026-01-01 Tiancheng Su , Meicong Zhang , Guoxiu He

Speculative decoding has emerged as an effective method to reduce latency and inference cost of LLM inferences. However, there has been inadequate attention towards the energy requirements of these models. To address this gap, this paper…

Machine Learning · Computer Science 2026-02-11 Rohit Dutta , Paramita Koley , Soham Poddar , Janardan Misra , Sanjay Podder , Naveen Balani , Saptarshi Ghosh , Niloy Ganguly

Speculative decoding accelerates inference in large language models (LLMs) by generating multiple draft tokens simultaneously. However, existing methods often struggle with token misalignment between the training and decoding phases,…

Computation and Language · Computer Science 2025-10-21 Shijing Hu , Jingyang Li , Xingyu Xie , Zhihui Lu , Kim-Chuan Toh , Pan Zhou

Large Language Models (LLMs) have become essential in advancing natural language processing (NLP) tasks, but their sequential token generation limits inference speed. Multi-Draft Speculative Decoding (MDSD) offers a promising solution by…

Computation and Language · Computer Science 2024-11-11 Ryan Sun , Tianyi Zhou , Xun Chen , Lichao Sun

The emergence of Large Language Models (LLMs) with strong reasoning capabilities marks a significant milestone, unlocking new frontiers in complex problem-solving. However, training these reasoning models, typically using Reinforcement…

Machine Learning · Computer Science 2026-03-23 Qinghao Hu , Shang Yang , Junxian Guo , Xiaozhe Yao , Yujun Lin , Yuxian Gu , Han Cai , Chuang Gan , Ana Klimovic , Song Han

Large language models (LLMs) deliver impressive generation quality, but incur very high inference cost because each output token is generated auto-regressively through all model layers. Early-exit based self-speculative decoding (EESD) has…

Computation and Language · Computer Science 2025-09-25 Ruanjun Li , Ziheng Liu , Yuanming Shi , Jiawei Shao , Chi Zhang , Xuelong Li

Speculative decoding is a widely used method that accelerates the generation process of large language models (LLMs) with no compromise in model performance. It achieves this goal by using an existing smaller model for drafting and then…

Computation and Language · Computer Science 2024-10-16 Weilin Zhao , Yuxiang Huang , Xu Han , Wang Xu , Chaojun Xiao , Xinrong Zhang , Yewei Fang , Kaihuo Zhang , Zhiyuan Liu , Maosong Sun

As large language models (LLMs) scale up, accuracy improves, but the autoregressive (AR) nature of decoding increases latency since each token requires a serial forward pass. Speculative decoding addresses this by employing a fast drafter…

Computation and Language · Computer Science 2025-10-06 Guanghao Li , Zhihui Fu , Min Fang , Qibin Zhao , Ming Tang , Chun Yuan , Jun Wang

Large Language Models (LLMs) achieve strong performance across many tasks but suffer from high inference latency due to autoregressive decoding. The issue is exacerbated in Large Reasoning Models (LRMs), which generate lengthy chains of…

Computation and Language · Computer Science 2026-02-05 Ximing Dong , Shaowei Wang , Dayi Lin , Boyuan Chen , Ahmed E. Hassan

Modern large language model (LLM) applications exhibit diverse service-level objectives (SLOs), from low-latency requirements in interactive coding assistants to more relaxed constraints in data wrangling tasks. Existing LLM serving…

Large language models (LLMs) achieve strong performance across diverse tasks but suffer from high inference latency due to their autoregressive generation. Speculative Decoding (SPD) mitigates this issue by verifying candidate tokens in…

Computation and Language · Computer Science 2026-04-30 Jinze Li , Yixing Xu , Guanchen Li , Shuo Yang , Jinfeng Xu , Xuanwu Yin , Dong Li , Edith C. H. Ngai , Emad Barsoum