Lazy CPU Performance

Lazy CPU Performance.swift

import UIKit

class ViewController: UIViewController {
    
    // ตัวอย่างข้อมูลแบบ JSON-Style Data
    // Count: 50,000
    static func fetchDataFromApi() -> [[String: Any]] {
        var output = [[String: Any]]()
        
        for _ in 0..<10000 {
            output += [["name": "Totiz", "age": 12],
                       ["name": "Dog", "age": 12],
                       ["name": "Cat", "age": 12],
                       ["name": "Book", "age": 12],
                       ["name": "Car", "age": 12]]
            
        }
        return output
    }
    // ตัวแปรเก็บข้อมูลทดสอบ
    var data = ViewController.fetchDataFromApi()
    
    
    // หาชื่อ Cat ใน JSON-Style Data
    // Average Run Time: 0.129
    @IBAction func hitMap(sender: AnyObject) {
        //let startTime = CFAbsoluteTimeGetCurrent()
        let prepareData = data.map{ $0["name"] as! String }
        let indexOfCat = prepareData.index { $0 == "Cat" }
        print( indexOfCat )
        //print( CFAbsoluteTimeGetCurrent() - startTime )
    }
    
    // Lazy Version หาชื่อ Cat ใน JSON-Style Data
    // Average Run Time: 0.000168
    @IBAction func hitLazyMap(sender: AnyObject) {
        //let startTime = CFAbsoluteTimeGetCurrent()
        let prepareData = data.lazy.map{ $0["name"] as! String }
        let indexOfCat = prepareData.index { $0 == "Cat" }
        print( indexOfCat )
        //print( CFAbsoluteTimeGetCurrent() - startTime )
    }
}