Look into leveraging Span<T>

[derek-will]

Span is likely useful for some aspects of this library.

https://learn.microsoft.com/en-us/archive/msdn-magazine/2018/january/csharp-all-about-span-exploring-a-new-net-mainstay

[garethpotter]

A first crack at making use of Span<T> here: #121.