Is there more info to this, I remember this from Commmon Lisp (but details evade me) that the compiler can take benefit of certain specific functions and rely o

Is there more info to this, I remember this from Commmon Lisp (but details evade me) that the compiler can take benefit of certain specific functions and rely on them being... "open coded" - e.g. it can produce more efficient code by replacing these with something more suitable... http://www.sbcl.org/manual/#Open-Coding-and-Inline-Expansion http://www.sbcl.org/manual/#Open-Coding-and-Inline-Expansion https://www.thecodingforums.com/threads/what-is-the-meaning-of-the-term-open-coded-in-the-following-extract.541773 https://www.thecodingforums.com/threads/what-is-the-meaning-...