speedtests2.swift

func runSpeedTests() {
    let s: String? = "test"
    let repeatCount = 10000000000

    var i = 0
    test("Optional Binding") {
        for _ in 0...repeatCount {
            if let _ = s { i += 1 }
        }
    }
    print(i)

    var j = 0
    test("eq not nil") {
        for _ in 0...repeatCount {
            if s != nil { j += 1 }
        }
    }
    print(j)

    var k = 0
    test("switch") {
        for _ in 0...repeatCount {
            switch s {
            case .some(_): k += 1
            case .none: ()
            }
        }
    }
    print(k)
}

func test(_ name: String, _ t: () -> ()) {
    let methodStart = Date()

    t()

    let methodFinish = Date()
    let executionTime = methodFinish.timeIntervalSince(methodStart)
    print("Execution time - \(name): \(executionTime)")
}