LeeBERT: Learned Early Exit for BERT with cross-level optimization Wei Zhu author 2021-08 text Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers) Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication zhu-2021-leebert 10.18653/v1/2021.acl-long.231 https://aclanthology.org/2021.acl-long.231/ 2021-08 2968 2980