“DOM recycling is a underutilized technique to keep the DOM node count low. The general idea is to use already created DOM elements that are off-screen instead of creating new ones. Admittedly, DOM nodes themselves are cheap, but they are not free, as each of them adds extra cost in memory, layout, style and paint. Low-end devices will get noticeably slower if not completely unusable if the website has too big of a DOM to manage.”