Aussie AI

LoRA Optimization

  • Last Updated 27 August, 2025
  • by David Spuler, Ph.D.

What is LoRA Optimization?

LoRA is an optimization for LLM fine-tuning that uses many fewer weights than traditional methods of brute-force fine-tuning. It is a type of Parameter-Efficient Fine-Tuning (PEFT) where not all the weights of an LLM are modified. LoRA uses low-rank matrices to achieve this reduction, giving it the name. The idea is that much smaller low-rank matrices are trained as an addition to the main model, so that the overall effect is that many fewer weight updates are required. The LoRA weight "adapters" can also be efficiently loaded into memory during inference, because they are much smaller than the main model.

Research on LoRA Optimization

Research papers include:

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