Insufficient RAM to load Models when using sdxl_gen_img.py in Free Google Colab Environment

Hi @kohya-ss,

With recent versions of the SD-Scripts, I've been running into issues with loading SDXL models, even with the FP16 flag set, when attempting to generate images with the sdxl_gen_img.py script in the free Google Colab environment because there is not enough RAM available.

Is it possible to implement the -lowram loading option in sdxl_gen_img.py?

Start with sdxl_gen_img.py, the named entry point, and trace its SDXL model-loading path to determine where the -lowram option belongs. Done means the script accepts that option and can load SDXL models within the RAM available in the free Google Colab environment; no test file is named in the issue.

Written by the indexing model from the issue text.