Prefetching refers to the practice of speculatively fetching documents or subresources in the background for pages that the user is likely to navigate to in the near future.
This can significantly reduce the load time for the prefetched page if the user does choose to navigate to it.
Prefetching might be used, for example, to fetch the page linked by a "Next" button or its subresources, or a link popup that a user hovers over, or search results....{ "prefetch": [ { "source": "list", "urls": ["next.html"] } ]...