I guess the author is unaware of Accelerate.framework, the vector library that has shipped with Mac OS since Jaguar.
Were the authors of Accelerate.framework unaware of the word Accelerate, which has shipped with the English language since the 1500s?
/s
Overlaps in naming happen, especially when we all want to choose simple and catchy words like "Accelerate."
Heh... I just spent 5 minutes looking at the repo, wondering the same thing. (I was a dev on the performance team at Apple) ;-)