先端学習ノートPart 1-2:JS性能最適化、GCアルゴリズム紹介とV 8エンジン

//  
let obj = {}
//  
obj.name = 'lg'
//  
obj = null

//  
let obj = {name: 'xm'}

let ali = obj

obj = null
//  
function objGroup(obj1, obj2){
    obj1.next = obj2
    obj2.prev = obj1
    return {
        o1: obj1,
        o2: obj2
    }
}
let obj = objGroup({name: 'obj1'},{name: 'obj2'})

console.log(obj)

//    
const user1 = {age: 11}
const user2 = {age: 22}
const user3 = {age: 33}

const nameList = [user1.age, user2.age, user3.age ]

function fn() {
    const num1 = 1
    const num2 = 2
}
fn() //      num1/num2        

//       
function fn() {
    const obj1 = {}
    const obj2 = {}
    pbj1.name = obj2
    obj2.name = obj1
    return 'lg is a code'
} 
fn() //obj1 obj2    ，