Here's an old but related post for what Facebook does: https://engineering.fb.com/2010/06/04/web/bigpipe-pipelining-web-pages-for-high-performance/ https://engi

Here's an old but related post for what Facebook does: https://engineering.fb.com/2010/06/04/web/bigpipe-pipelining-web-pages-for-high-performance/ https://engineering.fb.com/2010/06/04/web/bigpipe-pipelining... It's evolved since the full migrate to a react app but the high level concept hasn't changed.