Run results for: spread operator VS delete

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser: Chrome 112

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
imutable - spread operator	5725421.0 Ops/sec
imutable assign - delete	2764211.8 Ops/sec
imutable spread operator - delete	4977802.5 Ops/sec
imutable stringify - delete	240647.6 Ops/sec
mutable - delete	25932178.0 Ops/sec

Script Preparation code:

var user = {
id: 1,
    name: 'Hamed',
    gender: 'male',
  email: 'johndoe@example.com',
  address: {
    street: '123 Main Street',
    city: 'Anytown',
    state: 'ABC',
    country: 'XYZ'
  },
  hobbies: ['reading', 'coding', 'gaming'],
  education: [
    {
      degree: 'Bachelor of Science',
      major: 'Computer Science',
      university: 'ABC University',
      year: 2015
    },
    {
      degree: 'Master of Business Administration',
      major: 'Business Management',
      university: 'XYZ University',
      year: 2019
    }
  ],
  projects: {
    project1: {
      name: 'Project A',
      description: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.',
      startDate: '2020-01-01',
      endDate: '2021-12-31'
    },
    project2: {
      name: 'Project B',
      description: 'Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.',
      startDate: '2022-01-01',
      endDate: '2023-06-30'
    }
  }
    
}

Tests:

imutable - spread operator
const {gender, ...newUser} = user;
imutable assign - delete
const newUser = Object.assign({}, user); delete newUser.gender
imutable spread operator - delete
const newUser = { ...user } delete newUser.gender
imutable stringify - delete
const newUser = JSON.parse(JSON.stringify(user)); delete newUser.gender
mutable - delete
delete user.gender

Run results for: spread operator VS delete

Comparing the performance difference between the spread operator and the delete operator.

imutable - spread operator

imutable assign - delete

imutable spread operator - delete

imutable stringify - delete

mutable - delete