[swift] 실행시간 측정하기
start, end 구해서 end-start
func evaluateProblem(problemNumber: Int, problemBlock: () -> Int) -> Answer
{
print("Evaluating problem \(problemNumber)")
let start = DispatchTime.now() // <<<<< Start time
let myGuess = problemBlock()
let end = DispatchTime.now() // <<<<< End time
let theAnswer = self.checkAnswer(answerNum: "\(problemNumber)", guess: myGuess)
let nanoTime = end.uptimeNanoseconds - start.uptimeNanoseconds // <<<<< Difference in nano seconds (UInt64)
let timeInterval = Double(nanoTime) / 1_000_000_000 // Technically could overflow for long running test
print("Time to evaluate problem \(problemNumber): \(timeInterval) seconds")
return theAnswer
}
출처: https://stackoverflow.com/questions/24755558/measure-elapsed-time-in-swift