Do these "This Does Not Exist" sites do live image generation (they are so fast), or do they generate the images slowly over days and weeks and show us images from a cache?
I assume they generate a new image per time period [e.g. a second] and show the same image to everyone visiting the page rather than doing a generation per page load, simply because 1) they're so fast, and 2) sometimes if you refresh fast enough you can get the same image (at least one some TDNE sites). Would love to read some actual setup details though!