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Post-training quantization of Large Language Models (LLMs) is challenging. In this work, we introduce Low-rank Quantization Error Reduction (LQER), which combines quantization and low-rank approximation to recover the model capability. LQER…

Machine Learning · Computer Science 2024-05-31 Cheng Zhang , Jianyi Cheng , George A. Constantinides , Yiren Zhao

Large language models (LLMs) have revolutionized natural language processing tasks. However, their practical deployment is hindered by their immense memory and computation requirements. Although recent post-training quantization (PTQ)…

Machine Learning · Computer Science 2024-03-19 Wenqi Shao , Mengzhao Chen , Zhaoyang Zhang , Peng Xu , Lirui Zhao , Zhiqian Li , Kaipeng Zhang , Peng Gao , Yu Qiao , Ping Luo

The growing number of parameters and computational demands of large language models (LLMs) present significant challenges for their efficient deployment. Recently, there is an increasing interest in quantizing weights to extremely low…

Machine Learning · Computer Science 2025-02-18 Cheng Zhang , Jeffrey T. H. Wong , Can Xiao , George A. Constantinides , Yiren Zhao

Large language models (LLMs) have revolutionized natural language processing, albeit at the cost of immense memory and computation requirements. Post-training quantization (PTQ) is becoming the de facto method to reduce the memory footprint…

Machine Learning · Computer Science 2024-10-28 Yuhang Li , Priyadarshini Panda

Compared to Full-Model Fine-Tuning (FMFT), Parameter Efficient Fine-Tuning (PEFT) has demonstrated superior performance and lower computational overhead in several code understanding tasks, such as code summarization and code search. This…

Software Engineering · Computer Science 2024-02-12 Shuo Liu , Jacky Keung , Zhen Yang , Fang Liu , Qilin Zhou , Yihan Liao

Parameter-Efficient Fine-Tuning (PEFT), particularly Low-Rank Adaptation (LoRA), has become a standard approach for adapting Large Language Models (LLMs) under limited compute. However, in continual settings where models are updated…

Machine Learning · Computer Science 2026-05-14 Hung Le , Svetha Venkatesh

Several post-training quantization methods have been applied to large language models (LLMs), and have been shown to perform well down to 8-bits. We find that these methods break down at lower bit precision, and investigate quantization…

Computation and Language · Computer Science 2023-05-30 Zechun Liu , Barlas Oguz , Changsheng Zhao , Ernie Chang , Pierre Stock , Yashar Mehdad , Yangyang Shi , Raghuraman Krishnamoorthi , Vikas Chandra

Fine-tuning large language models (LLMs) is crucial for improving their performance on downstream tasks, but full-parameter fine-tuning (Full-FT) is computationally expensive and memory-intensive. Parameter-efficient fine-tuning (PEFT)…

Computation and Language · Computer Science 2026-05-12 Longteng Zhang , Lin Zhang , Shaohuai Shi , Xiaowen Chu , Bo Li

Although large language models have transformed natural language processing, their computational costs create accessibility barriers for low-resource languages such as Brazilian Portuguese. This work presents a systematic evaluation of…

Computation and Language · Computer Science 2026-03-24 Mariela M. Nina , Caio Veloso Costa , Lilian Berton , Didier A. Vega-Oliveros

Post-training quantization (PTQ) is essential for deploying large diffusion transformers on resource-constrained hardware, but aggressive 4-bit quantization significantly degrades generative performance. Low-rank approximation methods have…

Machine Learning · Computer Science 2026-04-21 Yann Bouquet , Alireza Khodamoradi , Sophie Yáng Shen , Kristof Denolf , Mathieu Salzmann

Memory-efficient finetuning of large language models (LLMs) has recently attracted huge attention with the increasing size of LLMs, primarily due to the constraints posed by GPU memory limitations and the effectiveness of these methods…

Machine Learning · Computer Science 2024-06-24 Baohao Liao , Christian Herold , Shahram Khadivi , Christof Monz

Post-training quantization (PTQ) has emerged as a promising technique to reduce the cost of large language models (LLMs). Specifically, PTQ can effectively mitigate memory consumption and reduce computational overhead in LLMs. To meet the…

Computation and Language · Computer Science 2024-06-07 Shiyao Li , Xuefei Ning , Luning Wang , Tengxuan Liu , Xiangsheng Shi , Shengen Yan , Guohao Dai , Huazhong Yang , Yu Wang

Quantization and fine-tuning are crucial for deploying large language models (LLMs) on resource-constrained edge devices. However, fine-tuning quantized models presents significant challenges, primarily stemming from: First, the mismatch in…

Machine Learning · Computer Science 2025-09-30 Junyu Chen , Junzhuo Li , Zhen Peng , Wenjie Wang , Yuxiang Ren , Long Shi , Xuming Hu

Post-training quantization (PTQ) is a promising approach to reducing the storage and computational requirements of large language models (LLMs) without additional training cost. Recent PTQ studies have primarily focused on quantizing only…

Machine Learning · Computer Science 2026-02-17 Reena Elangovan , Charbel Sakr , Anand Raghunathan , Brucek Khailany

Fine-tuning large language models (LLMs) is often limited by the memory available on commodity GPUs. Parameter-efficient fine-tuning (PEFT) methods such as QLoRA reduce the number of trainable parameters, yet still incur high memory usage…

Computation and Language · Computer Science 2025-12-17 Estelle Zheng , Nathan Cerisara , Sébastien Warichet , Emmanuel Helbert , Christophe Cerisara

QLoRA reduces the memory-cost of fine-tuning a large language model (LLM) with LoRA by quantizing the base LLM. However, quantization introduces quantization errors that negatively impact model performance after fine-tuning. In this paper…

Machine Learning · Computer Science 2024-10-22 Neal Lawton , Aishwarya Padmakumar , Judith Gaspers , Jack FitzGerald , Anoop Kumar , Greg Ver Steeg , Aram Galstyan

Large language models (LLMs) have significantly advanced the natural language processing paradigm but impose substantial demands on memory and computational resources. Quantization is one of the most effective ways to reduce memory…

Machine Learning · Computer Science 2025-04-29 Xilong Xie , Liang Wang , Limin Xiao , Meng Han , Lin Sun , Shuai Zheng , Xiangrong Xu

The post-training quantization (PTQ) challenge of bringing quantized neural net accuracy close to original has drawn much attention driven by industry demand. Many of the methods emphasize optimization of a specific degree-of-freedom (DoF),…

Machine Learning · Statistics 2023-03-21 Alex Finkelstein , Ella Fuchs , Idan Tal , Mark Grobman , Niv Vosco , Eldad Meller

Model compression methods are used to reduce the computation and energy requirements for Large Language Models (LLMs). Quantization Aware Training (QAT), an effective model compression method, is proposed to reduce performance degradation…

Machine Learning · Computer Science 2024-10-16 He Li , Jianhang Hong , Yuanzhuo Wu , Snehal Adbol , Zonglin Li

Post-training quantization (PTQ) is a widely used method to compress large language models (LLMs) without fine-tuning. It typically sets quantization hyperparameters (e.g., scaling factors) based on current-layer activations. Although this…

Machine Learning · Computer Science 2026-02-04 Zheqi Lv , Zhenxuan Fan , Qi Tian , Wenqiao Zhang , Yueting Zhuang