1000 products could mean 1000 images to show and 1000 templates to render and that may kill your browser (definitely true on a phone), and significant slowdown

1000 products could mean 1000 images to show and 1000 templates to render and that may kill your browser (definitely true on a phone), and significant slowdown even on a desktop/laptop. The solution is simply to load more data as you scroll. This should be fast enough for you not to even notice it.