vincent-pradeilles

Trigo.cachedCos(.pi * 2) // takes 48.85 µs

// value of cos for 2π is now cached

Trigo.cachedCos(.pi * 2) // takes 0.13 µs

vincent-pradeilles

struct Trigo {
    @Cached static var cachedCos = { (x: Double) in cos(x) }
}

vincent-pradeilles

@propertyWrapper
struct Cached<Input: Hashable, Output> {
    
    private var cachedFunction: (Input) -> Output

    init(wrappedValue: @escaping (Input) -> Output) {
        self.cachedFunction = Cached.addCachingLogic(to: wrappedValue)
    }
    
    var wrappedValue: (Input) -> Output {

vincent-pradeilles

@propertyWrapper
struct Cached<Input: Hashable, Output> {
    
    private var cachedFunction: (Input) -> Output
    
    var wrappedValue: (Input) -> Output {
        get { return self.cachedFunction }
    }
}

vincent-pradeilles

@propertyWrapper
struct Cached<Input: Hashable, Output> {
    private var cachedFunction: (Input) -> Output
}

vincent-pradeilles

struct Cached<Input: Hashable, Output> {
    private var cachedFunction: (Input) -> Output
}

vincent-pradeilles

var printer: (String) -> Void = { print($0) }