Before you settle on basing design decisions on a handful of strict breakpoints, make sure you consider the vast fragmentation of screen sizes and browser viewports.

Faster subsequent page-loads by prefetching or prerendering in-viewport links during idle time.

This project aims to be a drop-in solution for sites to prefetch links based on what is in the user's viewport.

Quicklink @ GitHub.

Compare viewport sizes.
A screen size comparison for responsive design