Are you lazy-loading your (thumbnail) images? this js library seems to be highly recommended by its author: https://github.com/ApoorvSaxena/lozad.js https://gi

Are you lazy-loading your (thumbnail) images? this js library seems to be highly recommended by its author: https://github.com/ApoorvSaxena/lozad.js https://github.com/ApoorvSaxena/lozad.js but I don't have any experience with it. If users typically view the full images sequentially, then a lightbox that preloads the next image(s) may help with perceived performance.