A Training-Free Sub-quadratic Cost Transformer Model Serving Framework with Hierarchically Pruned Attention - Lee, Heejun; Park, Geon; Lee, Youngwan; Suh, Jaduk; Kim, Jina; Jeong, Wonyong; Kim, Bumsik; Lee, Hyemin; Jeon, Myeongjae; Hwang, Sung Ju (International Conference on Learning Representations, 2025)