Run results for: Cloning b81d8fae-190a-4c8b-a9af-08bebc52bf2a

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.3 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
DeepClone1	238999.0 Ops/sec
deepClone2	277684.3 Ops/sec
deepClone3	216873.8 Ops/sec
deepClone4	348533.8 Ops/sec
structuredClone	301139.2 Ops/sec
JSON	638372.1 Ops/sec

Script Preparation code:

var deepClone1 = function(obj) {
  if (obj === null || typeof obj !== 'object') {
    return obj;
  }
  var clone = Object.assign({}, obj);
  Object.keys(clone).forEach(function(key) {
    clone[key] = deepClone1(clone[key]);
  });
  return clone;
}

var deepClone2 = function(obj) {
  if (obj === null || typeof obj !== 'object') {
    return obj;
  }
  var clone = Object.assign({}, obj);
  for (var key in clone) {
    clone[key] = deepClone2(clone[key]);
  }
  return clone;
}

var isObject = function(obj) {
  return typeof obj === 'object' && obj !== null;
}

var deepClone3 = function(obj) {
  if (!isObject(obj)) {
    return obj;
  }
  var clone = Object.assign({}, obj);
  for (var key in clone) {
    clone[key] = deepClone3(clone[key]);
  }
  return clone;
}

var deepClone4 = function(obj) {
  if (obj === null || typeof obj !== 'object') {
    return obj;
  }
  
  let clone = {...obj}
  for (const key in clone) {
    clone[key] = deepClone4(clone[key])
  }
  return clone
}

var testData = {
  name: 'John',
  age: 30,
  address: {
    street: '123 Main St',
    zip: 12345
  },
  hobbies: ['reading', 'swimming', 'hiking'],
  friends: [
    { name: 'Jane', age: 25 },
    { name: 'Bob', age: 32 },
    { name: 'Alice', age: 27 }
  ],
  job: {
    salary: 100000,
    benefits: ['health insurance', '401k', 'stock options']
  }
};

Tests:

DeepClone1
const r = deepClone1(testData)
deepClone2
const r = deepClone2(testData)
deepClone3
const r = deepClone3(testData)
deepClone4
const r = deepClone4(testData)
structuredClone
const r = structuredClone(testData)
JSON
const r = JSON.parse(JSON.stringify(testData))

Run results for: Cloning b81d8fae-190a-4c8b-a9af-08bebc52bf2a

DeepClone1

deepClone2

deepClone3

deepClone4

structuredClone

JSON