For each vs for loop performance

ForPerformance.playground

//: Playground - noun: a place where people can play

import XCTest

class MyTests: XCTestCase {

    lazy var testData: [Int] = {
        return (0..<1000).map { Int($0) }
    }()

    func testForLoop() {
        measure {
            var evenNumbers: [Int] = []
            for number in testData {
                if number % 2 == 0 {
                    evenNumbers.append(number)
                }
            }
        }
    }

    func testForEachLoop() {
        measure {
            var evenNumbers: [Int] = []
            testData.filter { number in number % 2 == 0}.forEach { evenNumbers.append($0) }
        }
    }
}

MyTests.defaultTestSuite.run()