The article discusses OnnxStream, a lightweight inference library that can run Stable Diffusion models on devices with limited RAM, such as the Raspberry Pi Zero 2. OnnxStream achieves this by decoupling the inference engine from the model weights and using techniques like attention slicing and dynamic quantization. The library can consume up to 55x less memory than other frameworks while being only slightly slower. This allows for running complex models like Stable Diffusion XL 1.0 on devices that would otherwise be unable to handle them.