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arXiv · 2404.00489

Prompt-SAW: Leveraging Relation-Aware Graphs for Textual Prompt Compression

Muhammad Asif Ali·Zhengping Li·Shu Yang·Keyuan Cheng·Yang Cao·Tianhao Huang·Guimin Hu·Weimin Lyu·Lijie Hu·Lu Yu·Di Wang
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Abstract

Large Language Models (LLMs) have shown exceptional abilities for multiple different natural language processing tasks. While prompting is a crucial tool for LLM inference, we observe that there is a significant cost associated with exceedingly lengthy prompts. Existing attempts to compress lengthy prompts lead to substandard results in terms of readability/interpretability of the compressed prompt, with a detrimental impact on prompt utility. To address this, we propose PromptSAW: Prompt compresSion via Relation AWare graphs, an effective strategy for prompt compression over task-agnostic and task-aware prompts. Prompt-SAW uses the prompt's textual information to build a graph and later extracts key information elements in the graph to come up with the compressed prompt. We also propose GSM8K-aug, i.e., an extended version of the existing GSM8K benchmark for task-agnostic prompts in order to provide a comprehensive evaluation platform. Experimental evaluation using benchmark datasets shows that prompts compressed by Prompt-SAW are not only better in terms of readability, but they also outperform the best-performing baseline models by up to 10.1 and 77.1, respectively, for task-agnostic and task-aware settings while compressing the original prompt text by 34.9 and 56.7.

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Muhammad Asif Ali, Zhengping Li, Shu Yang, Keyuan Cheng, Yang Cao, Tianhao Huang, Guimin Hu, Weimin Lyu, Lijie Hu, Lu Yu, Di Wang. 2024-03-30. Prompt-SAW: Leveraging Relation-Aware Graphs for Textual Prompt Compression. https://arxiv.org/abs/2404.00489

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