When I swipe between pages on mobile, it takes about 5 seconds for the next image to appears. There is only one image per page, each with a size of about 0.5 to 2MB. All of the images have dimensions of 1530x1980.

I may need to right a script to use reduced-dimension versions of these images on mobile in order to have them load at a reasonable speed. Do you have any insight to provide on this issue?