https://maxhalford.github.io/blog/online-learning-evaluation/
The correct way to evaluate online machine learning models
Max Halford
2020-06-07
“Batch models are meant to be used when you can afford to retrain your model from scratch every so often. Online models, on the contrary, are meant to be used when you want your model to learn from a stream of data, and therefore never have to restart from scratch.”