swift_array_empty.swift

import UIKit

var records = [(String, Double, Double)]()

func compareOperations(name: String, repeats: Int, operations: [()->()]) {
    var record = (name, 0.0, 0.0)
    for (index, opertion) in operations.enumerated() {
        let startTime = CFAbsoluteTimeGetCurrent()
        for _ in 1...repeats {
            opertion()
        }
        let timeInterval = (CFAbsoluteTimeGetCurrent() - startTime)*1000
        if index == 0 {
            record.1 = timeInterval
        } else {
            record.2 = timeInterval
        }
    }
    records.append(record)
}

let number = 1

let array0 = Array(repeating: number, count: 0)
let array1 = Array(repeating: number, count: 1)
let array2 = Array(repeating: number, count: 10)
let array3 = Array(repeating: number, count: 100)
let array4 = Array(repeating: number, count: 1000)
let array5 = Array(repeating: number, count: 10000)
let array6 = Array(repeating: number, count: 100000)
let array7 = Array(repeating: number, count: 1000000)
let array8 = Array(repeating: number, count: 10000000)

let text = "Hello, World!"
let arrayi0 = Array(repeating: text, count: 0)
let arrayi1 = Array(repeating: text, count: 1)
let arrayi2 = Array(repeating: text, count: 10)
let arrayi3 = Array(repeating: text, count: 100)
let arrayi4 = Array(repeating: text, count: 1000)
let arrayi5 = Array(repeating: text, count: 10000)
let arrayi6 = Array(repeating: text, count: 100000)
let arrayi7 = Array(repeating: text, count: 1000000)
let arrayi8 = Array(repeating: text, count: 10000000)

let dictionary: Dictionary<String, Any> = ["name": "John", "class": "Smith", "age": 14]

let arrayd0 = Array(repeating: dictionary, count: 0)
let arrayd1 = Array(repeating: dictionary, count: 1)
let arrayd2 = Array(repeating: dictionary, count: 10)
let arrayd3 = Array(repeating: dictionary, count: 100)
let arrayd4 = Array(repeating: dictionary, count: 1000)
let arrayd5 = Array(repeating: dictionary, count: 10000)
let arrayd6 = Array(repeating: dictionary, count: 100000)
let arrayd7 = Array(repeating: dictionary, count: 1000000)
let arrayd8 = Array(repeating: dictionary, count: 10000000)

func generateOperations(array: [Any]) -> [()->()] {
    var operations = [()->()]()
    operations.append {
        if array.count == 0 {
            
        }
    }
    operations.append {
        if array.isEmpty {
            
        }
    }
    return operations
}

let repeats = 100000

compareOperations(name: "Int Array Elements 0", repeats: repeats, operations: generateOperations(array: array0))
compareOperations(name: "Int Array Elements 1", repeats: repeats, operations: generateOperations(array: array1))
compareOperations(name: "Int Array Elements 10", repeats: repeats, operations: generateOperations(array: array2))
compareOperations(name: "Int Array Elements 100", repeats: repeats, operations: generateOperations(array: array3))
compareOperations(name: "Int Array Elements 1000", repeats: repeats, operations: generateOperations(array: array4))
compareOperations(name: "Int Array Elements 10000", repeats: repeats, operations: generateOperations(array: array5))
compareOperations(name: "Int Array Elements 100000", repeats: repeats, operations: generateOperations(array: array6))
compareOperations(name: "Int Array Elements 1000000", repeats: repeats, operations: generateOperations(array: array7))
compareOperations(name: "Int Array Elements 10000000", repeats: repeats, operations: generateOperations(array: array8))

compareOperations(name: "String Array Elements 0", repeats: repeats, operations: generateOperations(array: arrayi0))
compareOperations(name: "String Array Elements 1", repeats: repeats, operations: generateOperations(array: arrayi1))
compareOperations(name: "String Array Elements 10", repeats: repeats, operations: generateOperations(array: arrayi2))
compareOperations(name: "String Array Elements 100", repeats: repeats, operations: generateOperations(array: arrayi3))
compareOperations(name: "String Array Elements 1000", repeats: repeats, operations: generateOperations(array: arrayi4))
compareOperations(name: "String Array Elements 10000", repeats: repeats, operations: generateOperations(array: arrayi5))
compareOperations(name: "String Array Elements 100000", repeats: repeats, operations: generateOperations(array: arrayi6))
compareOperations(name: "String Array Elements 1000000", repeats: repeats, operations: generateOperations(array: arrayi7))
compareOperations(name: "String Array Elements 10000000", repeats: repeats, operations: generateOperations(array: arrayi8))

compareOperations(name: "Dict Array Elements 0", repeats: repeats, operations: generateOperations(array: arrayd0))
compareOperations(name: "Dict Array Elements 1", repeats: repeats, operations: generateOperations(array: arrayd1))
compareOperations(name: "Dict Array Elements 10", repeats: repeats, operations: generateOperations(array: arrayd2))
compareOperations(name: "Dict Array Elements 100", repeats: repeats, operations: generateOperations(array: arrayd3))
compareOperations(name: "Dict Array Elements 1000", repeats: repeats, operations: generateOperations(array: arrayd4))
compareOperations(name: "Dict Array Elements 10000", repeats: repeats, operations: generateOperations(array: arrayd5))
compareOperations(name: "Dict Array Elements 100000", repeats: repeats, operations: generateOperations(array: arrayd6))
compareOperations(name: "Dict Array Elements 1000000", repeats: repeats, operations: generateOperations(array: arrayd7))
compareOperations(name: "Dict Array Elements 10000000", repeats: repeats, operations: generateOperations(array: arrayd8))

print(records)