> On Jul 28, 2016, at 6:38 AM, Paulo Faria via swift-evolution > <[email protected]> wrote: >>> I doubt there would be a performance difference between adding `func >>> joined() { return joined(separator: "") }` and changing the parameter to >>> `separator: String = "”`. >> >> I’ll let a stdlib guru comment on this :-) > > I’m very curious about this. Default parameters are really slower?
The version that takes an arbitrary separator as a parameter (defaulted or not) does twice as many appends unless it specifically recognizes the empty separator as a special case. That said, I'm not sure it shouldn't try to recognize the empty separator as a special case. John. _______________________________________________ swift-evolution mailing list [email protected] https://lists.swift.org/mailman/listinfo/swift-evolution
