LTLS
Log-time and Log-space Extreme Classification
**LTLS** is a technique for multiclass and multilabel prediction that can perform training and inference in logarithmic time and space. LTLS embeds large classification problems into simple structured prediction problems and relies on efficient dynamic programming algorithms for inference. It tackles extreme multi-class and multi-label classification problems where the size $C$ of the output space is extremely large.
Log-time and Log-space Extreme Classification
https://paperswithcode.com/paper/log-time-and-log-space-extreme-classification
Log-time and Log-space Extreme Classification