>> the core problem: namely, that a big or slow request can block you from doing anything else > Why is that the core problem? Head of line blocking leaves the

>> the core problem: namely, that a big or slow request can block you from doing anything else > Why is that the core problem? Head of line blocking leaves the network idle, and one of the key factors to good front end performance is to overcome network latency and start using the network / growing the congestion window as soon as possible.