iPhone 上什么速度更快 XML pList 还是 JSON

在iPhone上，JSON的速度更快还是XML和pList更快？这是一个常见的问题，因为在iOS开发中，我们经常需要处理数据的序列化和反序列化。在选择合适的数据格式时，性能往往是一个关键因素。本文将探讨在iPhone上JSON、XML和pList之间的性能差异，并给出相应的案例代码来进行对比测试。

swift
import Foundation
struct User: Codable {
    let id: Int
    let name: String
    let age: Int
}
func testJSONSerialization() {
    let users = (1...1000).map { User(id: $0, name: "User \($0)", age: 20) }
    
    if let jsonData = try? JSONEncoder().encode(users) {
        let startTime = CFAbsoluteTimeGetCurrent()
        let _ = try? JSONDecoder().decode([User].self, from: jsonData)
        let endTime = CFAbsoluteTimeGetCurrent()
        let elapsedTime = endTime - startTime
        print("JSON serialization time: \(elapsedTime) seconds")
    }
}
func testXMLSerialization() {
    let users = (1...1000).map { User(id: $0, name: "User \($0)", age: 20) }
    
    if let xmlData = try? PropertyListEncoder().encode(users) {
        let startTime = CFAbsoluteTimeGetCurrent()
        let _ = try? PropertyListDecoder().decode([User].self, from: xmlData)
        let endTime = CFAbsoluteTimeGetCurrent()
        let elapsedTime = endTime - startTime
        print("XML serialization time: \(elapsedTime) seconds")
    }
}
func testPListSerialization() {
    let users = (1...1000).map { User(id: $0, name: "User \($0)", age: 20) }
    
    if let plistData = try? PropertyListSerialization.data(fromPropertyList: users, format: .xml, options: 0) {
        let startTime = CFAbsoluteTimeGetCurrent()
        let _ = try? PropertyListSerialization.propertyList(from: plistData, options: [], format: nil)
        let endTime = CFAbsoluteTimeGetCurrent()
        let elapsedTime = endTime - startTime
        print("pList serialization time: \(elapsedTime) seconds")
    }
}
testJSONSerialization()
testXMLSerialization()
testPListSerialization()