Cloudflare is doing fantastic job to the web community security and backend engineering. This latest fix is awesome it is the ability to auto-tune window size buffer when it comes to uploading HTTP/2 traffic.
Article
https://blog.cloudflare.com/delivering-http-2-upload-speed-improvements/
4:15 slow tcp start https://www.youtube.com/watch?v=rgPcxg8gjho&t=1s
5:40 HTTP crash course https://www.youtube.com/watch?v=0OrmKCB0UrQ&t=4s
6:20 TCP crash course https://www.youtube.com/watch?v=qqRYkcta6IE
12:20 Bandwidth bideo https://www.youtube.com/watch?v=6Tf80mbhyAQ
The Backend Engineering Show with Hussein Nasser