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Swift Compiler optimization level for unit tests set to -O Apple LLVM 6.0/7.0 Optimization Level set to Fastest, Aggressive Optimizations -Ofast

Tests written in Objective-C

Shuffle 1,000,000 NSNumber objects in NSMutableArray
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 0.304 seconds 5% STDEV 0.376 seconds 1% STDEV - iPhone 6 (8.3)
Swift 1.2 0.281 seconds 3% STDEV 0.303 seconds 1% STDEV - iPhone 6 (8.3)
Swift 2.0 0.270 seconds 2% STDEV 0.273 seconds 2% STDEV - iPhone 6 (8.3)
Swift 2.1 0.313 seconds 2% STDEV 0.318 seconds 3% STDEV - iPhone 6 (9.2)
Swift 2.2 Snapshot 0.259 seconds 3% STDEV 0.261 seconds 2% STDEV - iPhone 6 (9.2)
Shuffle 1,000,000 NSString objects in NSMutableArray
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 1.091 seconds 2% STDEV 1.290 seconds 3% STDEV - iPhone 6 (8.3)
Swift 1.2 1.129 seconds 3% STDEV 1.238 seconds 2% STDEV - iPhone 6 (8.3)
Swift 2.0 1.106 seconds 2% STDEV 1.096 seconds 1% STDEV - iPhone 6 (8.3)
Swift 2.1 0.307 seconds 2% STDEV 0.312 seconds 2% STDEV - iPhone 6 (9.2)
Swift 2.2 Snapshot 0.258 seconds 4% STDEV 0.265 seconds 6% STDEV - iPhone 6 (9.2)
Shuffle 1,000,000 ObjcObject objects in NSMutableArray
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 0.839 seconds 4% STDEV 1.014 seconds 4% STDEV - iPhone 6 (8.3)
Swift 1.2 0.799 seconds 3% STDEV 0.867 seconds 1% STDEV - iPhone 6 (8.3)
Swift 2.0 0.791 seconds 4% STDEV 0.798 seconds 2% STDEV - iPhone 6 (8.3)
Swift 2.1 0.877 seconds 2% STDEV 0.862 seconds 1% STDEV - iPhone 6 (9.2)
Swift 2.2 Snapshot 0.775 seconds 4% STDEV 0.780 seconds 4% STDEV - iPhone 6 (9.2)
Shuffle 1,000,000 SwiftObject objects in NSMutableArray
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 0.818 seconds 1% STDEV 1.015 seconds 1% STDEV - iPhone 6 (8.3)
Swift 1.2 0.854 seconds 2% STDEV 0.898 seconds 2% STDEV - iPhone 6 (8.3)
Swift 2.0 0.808 seconds 2% STDEV 0.817 seconds 2% STDEV - iPhone 6 (8.3)
Swift 2.1 0.861 seconds 3% STDEV 0.853 seconds 3% STDEV - iPhone 6 (9.2)
Swift 2.2 Snapshot 0.769 seconds 4% STDEV 0.779 seconds 6% STDEV - iPhone 6 (9.2)
Empty loop 1,000,000 objects with NSMutableArray
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 0.006 seconds 2% STDEV 0.005 seconds 9% STDEV - iPhone 6 (8.3)
Swift 1.2 0.004 seconds 3% STDEV 0.005 seconds 10% STDEV - iPhone 6 (8.3)
Swift 2.0 0.004 seconds 3% STDEV 0.004 seconds 2% STDEV - iPhone 6 (8.3)
Swift 2.1 0.005 seconds 8% STDEV 0.005 seconds 11% STDEV - iPhone 6 (9.2)
Swift 2.2 Snapshot 0.006 seconds 36% STDEV 0.005 seconds 2% STDEV - iPhone 6 (9.2)

Tests written in Swift

Shuffle 1,000,000 Int objects with Swift implementation taking [AnyObject]
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 0.296 seconds 1% STDEV - 1.616 seconds 2% STDEV iPhone 6 (8.3)
Swift 1.2 0.262 seconds 1% STDEV - 0.523 seconds 1% STDEV iPhone 6 (8.3)
Swift 2.0 0.271 seconds 2% STDEV - 0.285 seconds 2% STDEV iPhone 6 (8.3)
Swift 2.1 0.305 seconds 1% STDEV - 0.336 seconds 5% STDEV iPhone 6 (9.2)
Swift 2.2 Snapshot 0.256 seconds 1% STDEV - 0.284 seconds 7% STDEV iPhone 6 (9.2)
Shuffle 1,000,000 Int objects with Swift implementation taking [Any]
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 Same as above - 0.537 seconds 3% STDEV iPhone 6 (8.3)
Swift 1.2 Same as above - 0.289 seconds 2% STDEV iPhone 6 (8.3)
Swift 2.0 Same as above - 0.303 seconds 2% STDEV iPhone 6 (8.3)
Swift 2.1 Same as above - 0.378 seconds 6% STDEV iPhone 6 (9.2)
Swift 2.2 Snapshot Same as above - 0.340 seconds 3% STDEV iPhone 6 (9.2)
Shuffle 1,000,000 Int objects with Swift implementation taking [Int]
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 Same as above - 0.181 seconds 2% STDEV iPhone 6 (8.3)
Swift 1.2 Same as above - 0.189 seconds 2% STDEV iPhone 6 (8.3)
Swift 2.0 Same as above - 0.197 seconds 5% STDEV iPhone 6 (8.3)
Swift 2.1 Same as above - 0.240 seconds 2% STDEV iPhone 6 (9.2)
Swift 2.2 Snapshot Same as above - 0.198 seconds 6% STDEV iPhone 6 (9.2)
Shuffle 1,000,000 Int objects with Swift implementation taking [T]
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 Same as above - 32.627 seconds 1% STDEV iPhone 6 (8.3)
Swift 1.2 Same as above - 2.155 seconds 1% STDEV iPhone 6 (8.3)
Swift 2.0 Same as above - 1.478 seconds 2% STDEV iPhone 6 (8.3)
Swift 2.1 Same as above - 2.025 seconds 1% STDEV iPhone 6 (9.2)
Swift 2.2 Snapshot Same as above - 2.185 seconds 2% STDEV iPhone 6 (9.2)
Shuffle 1,000,000 String objects with Swift implementation taking [String]
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 1.137 seconds 2% STDEV - 0.829 seconds 2% STDEV iPhone 6 (8.3)
Swift 1.2 1.112 seconds 3% STDEV - 0.891 seconds 3% STDEV iPhone 6 (8.3)
Swift 2.0 1.114 seconds 2% STDEV - 0.925 seconds 1% STDEV iPhone 6 (8.3)
Swift 2.1 1.253 seconds 3% STDEV - 1.010 seconds 3% STDEV iPhone 6 (9.2)
Swift 2.2 Snapshot 1.138 seconds 2% STDEV - 0.878 seconds 2% STDEV iPhone 6 (9.2)
Shuffle 1,000,000 ObjcObject objects with Swift implementation taking [ObjcObject]
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 0.816 seconds 3% STDEV - 2.529 seconds 1% STDEV iPhone 6 (8.3)
Swift 1.2 0.794 seconds 2% STDEV - 1.252 seconds 1% STDEV iPhone 6 (8.3)
Swift 2.0 0.794 seconds 2% STDEV - 0.820 seconds 2% STDEV iPhone 6 (8.3)
Swift 2.1 0.827 seconds 4% STDEV - 0.895 seconds 2% STDEV iPhone 6 (9.2)
Swift 2.2 Snapshot 0.748 seconds 4% STDEV - 0.810 seconds 1% STDEV iPhone 6 (9.2)
Shuffle 1,000,000 SwiftObject objects with Swift implementation taking [SwiftObject]
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 0.826 seconds 2% STDEV - 2.527 seconds 1% STDEV iPhone 6 (8.3)
Swift 1.2 0.795 seconds 2% STDEV - 1.352 seconds 1% STDEV iPhone 6 (8.3)
Swift 2.0 0.796 seconds 2% STDEV - 0.830 seconds 3% STDEV iPhone 6 (8.3)
Swift 2.1 0.835 seconds 4% STDEV - 0.887 seconds 3% STDEV iPhone 6 (9.2)
Swift 2.2 Snapshot 0.755 seconds 3% STDEV - 0.809 seconds 3% STDEV iPhone 6 (9.2)
Shuffle 1,000,000 SwiftStructObject objects with Swift implementation taking [SwiftStructObject]
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 - - 0.070 seconds 1% STDEV iPhone 6 (8.3)
Swift 1.2 - - 0.065 seconds 3% STDEV iPhone 6 (8.3)
Swift 2.0 - - 0.067 seconds 2% STDEV iPhone 6 (8.3)
Swift 2.1 - - 0.067 seconds 5% STDEV iPhone 6 (9.2)
Swift 2.2 Snapshot - - 0.069 seconds 17% STDEV iPhone 6 (9.2)
Empty loop 1,000,000 Int objects in [Int]
Version Objective-C Bridgeable Swift Swift Device (iOS Version)
Swift 1.1 0.010 seconds 38% STDEV - 0.003 seconds 49% STDEV iPhone 6 (8.3)
Swift 1.2 0.005 seconds 10% STDEV - 0.001 seconds 20% STDEV iPhone 6 (8.3)
Swift 2.0 0.005 seconds 23% STDEV - 0.001 seconds 10% STDEV iPhone 6 (8.3)
Swift 2.1 0.005 seconds 35% STDEV - 0.001 seconds 9% STDEV iPhone 6 (9.2)
Swift 2.2 Snapshot 0.005 seconds 24% STDEV - 0.000 seconds 106% STDEV iPhone 6 (9.2)