Interestingly, Swift (as of now) can be orders of magnitude slower than C/Objective-C: http://stackoverflow.com/questions/24101718/swift-performance-sorting-arr

Interestingly, Swift (as of now) can be orders of magnitude slower than C/Objective-C: http://stackoverflow.com/questions/24101718/swift-performance-sorting-arrays http://stackoverflow.com/questions/24101718/swift-performanc... I hope/expect the out-of-box performance will improve over time, but I guess it shouldn't be taken as fact that Swift will always be faster than its predecessor.