Primitive function in R
<p>Can someone give me explanation for the below sentence highlighted in Bold.</p>

<p>"Primitive functions are only found in the base package, and since they operate at a low level, they can be more efficient (primitive replacement functions don’t have to make copies), and can have different rules for argument matching (e.g., switch and call). <strong>This, however, comes at a cost of behaving differently from all other functions in R. Hence the R core team generally avoids creating them unless there is no other option.</strong> </p>

<p>Source Link:<a href="http://adv-r.had.co.nz/Functions.html#lexical-scoping" rel="noreferrer">http://adv-r.had.co.nz/Functions.html#lexical-scoping</a></p>