An elegant design heavily based on protocols. The question is: is it really fast?
Mac – Swift
Complete list of built-in functions in the Swift standard library
When we know that only 7 of 74 function are documented, we understand this list can very usefull: Swift Standard Library: Documented and undocumented built-in functions in the Swift standard library – the complete list with all 74 functions | practicalswift.com.