手法を比較

	Longformer / BigBird	XGBoost
分野	深層学習	機械学習
系統	Machine learning	Machine learning
提唱年	2020	2016
提唱者	Beltagy, Peters & Cohan (Longformer); Zaheer et al. (BigBird)	Chen, T. & Guestrin, C.
種類	Sparse-attention Transformer for long sequences	Ensemble (gradient-boosted decision trees)
原典	Beltagy, I., Peters, M. E. & Cohan, A. (2020). Longformer: The Long-Document Transformer. arXiv.	Chen, T. & Guestrin, C. (2016). XGBoost: A Scalable Tree Boosting System. Proceedings of the 22nd ACM SIGKDD, 785–794.
別名	Uzun Dizi Transformer (Longformer / BigBird), uzun dizi transformer, long-document transformer, sparse-attention transformer	XGBoost, extreme gradient boosting, scalable tree boosting
関連	4	5
概要	Long-sequence Transformers such as Longformer (Beltagy, Peters & Cohan, 2020) and BigBird (Zaheer et al., 2020) replace the standard Transformer's O(n²) attention with sparse attention patterns that scale linearly, O(n), with sequence length. This lets a single model attend over thousands of tokens — full documents, legal texts, or genomic sequences — that would not fit a conventional Transformer.	XGBoost (Extreme Gradient Boosting) is a scalable tree-boosting algorithm introduced by Tianqi Chen and Carlos Guestrin in 2016. It builds a strong predictor by adding decision trees one at a time, each correcting the errors left by the trees before it, and is a powerful prediction method widely used in competitions.