Nagle's algorithm[0]. So long as you haven't recieved a "Where the hell is my mail" phone call, just keep adding stuff to the second truck until that second tru

Nagle's algorithm[0]. So long as you haven't recieved a "Where the hell is my mail" phone call, just keep adding stuff to the second truck until that second truck fills up, and send it later. [0]: https://en.wikipedia.org/wiki/Nagle%27s_algorithm https://en.wikipedia.org/wiki/Nagle%27s_algorithm