Data Structures and Algorithms

I specifically mentioned HTTP/2 because it should have been easy for everyone to both test and find the relevant info.

But anyway, here is a short explanation, and the curl-library thread where the issue was first encountered.

You should also find plenty of blog posts where "unexplainable delay"/"unexplainable slowness"/"something is stuck" is in the premise, and then after a lot of story development and "suspense", the big reveal comes that it was Nagle's fault.

As with many things TCP. A technique that may have been useful once, ends up proving to be counterproductive when used with modern protocols, workflows, and networks.