How much overhead do HTTP headers add on average?

tldr: Testing 1000 popular domains for HTTP header sizes. On average it will&#xA;take 1-2KB. There are small header with 300 byte and huge one with 28KB. &#xA; Introduction &#xA; Several month ago I made a talk in the local developer community for flutter&#xA;developers about cartoonish representation of how low level networking works.&#xA;The talk discussed networking mostly from frontend…