Tied-Lora: Enhacing parameter efficiency of LoRA with weight tying
Authors: name: Adithya Renduchintala, name: Tugrul Konuk, name: Oleksii Kuchaiev

We propose Tied-LoRA, a simple paradigm utilizes weight tying and selective
training to further increase parameter efficiency of the Low-rank adaptation
(LoRA) method. Our investigations include all feasible combinations parameter
training/freezing in conjunction with weight tying to identify the optimal
balance between performance and the number of trainable parameters. Through
experiments covering a variety of tasks and two base language models, we
provide analysis revealing trade-offs between efficiency and performance. Our
experiments uncovered a particular Tied-LoRA configuration that stands out by
demonstrating comparable performance across several tasks while employing only
13~\% percent of parameters utilized by the standard LoRA method.