@_specialized なお話し

Swift の @_specialized について

Transcript

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7. !@TQFDJBMJ[F public class Game<T : Pingable> : Playable { var t : T public init (_ v : T) {t = v} @_specialize(Int) public func play() { for _ in 0...100_000_000 { t = t.ping() } } }
8. 20x faster
9. public protocol Pingable { func ping() -> Self } public protocol Playable { func play() } extension Int : Pingable { public func ping() -> Int { return self + 1 } } public class Game<T : Pingable> : Playable { var t : T public init (_ v : T) {t = v} @_specialize(Int) public func play() { for _ in 0...100_000_000 { t = t.ping() } } } Game(10).play() Application.swift Framework.swift
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11. $ diff -u =(nm -naj Framework.build/Framework.swift.o) \ =(nm -naj FrameworkSp.build/Framework.swift.o) $ diff -u =(nm -na Framework.build/Framework.swift.o | head -n 25) \ =(nm -na FrameworkSp.build/Framework.swift.o | head -n 25 ) \ | swift demangle --- /tmp/zshPdqiBd 2016-12-26 16:11:46.000000000 +0900 +++ /tmp/zshdhTiwz 2016-12-26 16:11:46.000000000 +0900 @@ -21,5 +21,5 @@ 00000000000000e0 T _type metadata accessor for Framework.Game 0000000000000110 T _rt_swift_allocObject 0000000000000120 T _Framework.Game.play () -> () -0000000000000220 T _Framework.Game.__deallocating_deinit -0000000000000260 T _Framework.Game.deinit +0000000000000270 T _Framework.Game.__deallocating_deinit +00000000000002b0 T _Framework.Game.deinit
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