The Continual Learning Problem

jessylin.com · 3,435 words · saved by 5 readers

If we want to move towards a world where models are “always training” and continually learning from experience over time, we need to address a basic challenge: how do we keep updating the parameters of a model without breaking it? In this post, I’ll motivate memory layers as a natural architecture for this paradigm: high-capacity, but sparse (few active parameters) on each forward pass. In our recent paper, we found that finetuning memory layers enables learning without forgetting much more effectively than LoRA: when learning TriviaQA facts, NaturalQuestions performance drops by 89% with full finetuning and 71% with LoRA, but only 11% with memory layers. Along the way, I’ll also discuss the challenges of the continual learning problem broadly.

The Continual Learning Problem A perspective on continual learning, motivating our paper on sparse memory finetuning 20 Oct 2025 If we want to move towards a world where models are “always training” and continually learning from experience over time, we need to address a basic challenge: how do we keep updating the parameters of a model without breaking it? In this post, I’ll motivate memory layers as a natural architecture for this paradigm: high-capacity, but sparse (few active parameters) on each forward pass. In our recent paper, we found that finetuning memory layers enables learning with

The Continual Learning Problem

saved by

related reading