Tyler Cipriani Creative Commons Attribution-ShareAlike License Copyright © 2017 Tyler Cipriani https://tylercipriani.com/blog/2016/09/25/the-14kb-in-the-tcp-initial-window/ Tyler Cipriani ikiwiki 2018-03-13T12:49:16Z https://tylercipriani.com/blog/2016/09/25/the-14kb-in-the-tcp-initial-window/comment_1_9f3b196a8923d4143bb3ce0bd3bd206e/ Pratyush 2018-03-11T00:45:01Z 2018-03-11T00:45:00Z Hey great article. Thanks for posting. The source article also mentions that “Ideally, the ATF content should fit under 98KB - this allows the browser to paint the page after just three roundtrips to have plenty time budget for server response latency and client rendering.”. Can you explain how do they arrive at the number of 98kb? https://tylercipriani.com/blog/2016/09/25/the-14kb-in-the-tcp-initial-window/comment_2_27681298f3bc5c19c14cadc01b4a58f6/ Pratyush 2018-03-13T12:49:16Z 2018-03-13T12:49:15Z Ok. Got it. They are counting 3 trips for 98KB size ATF content because TCP after initial packets of 14kb, TCP doubles the packet size in each connection to 28 KB, and then 56 KB (TCP packet size keeps on increasing until there is data loss). So in three roundtrips, you can get 14 kb + 28 kb + 56 kb = 98 KB of content!