Comment by AdieuToLogic

> It's kind of like the small string optimization you see in C++ ...

Agreed. These types of optimizations can yield significant benefits and are often employed in language standard libraries. For example, the Scala standard library employs an analogous optimization in their Set[0] collection type.

0 - https://github.com/scala/scala3/blob/88438e2c6e6204e12666067...