Run results for: Lodash merge/clone vs Objest.assign vs object spread

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_1) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Safari/605.1.15

Browser: Safari 13

Operating system: Mac OS X 10.15.1

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Lodash merge/clone	243428.3 Ops/sec
Objest.assign	1569088.0 Ops/sec
object spread	469136.8 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var o1 = {
 a: {
   b: 1,
   c: 2,
   d: 3,
   j: {
     k: [1,2,3],
     l: [4,5,6]
   },
 },
 e: [1,2,3,4,5,6],
 f: 1,
 g: {
   h: 1,
 }
}

var o2 = {
  x: 'abc',
  y: true,
  z: 'last',
  w: [1,2,3]
}

Tests:

Lodash merge/clone
const a = _.merge(_.clone(o1), o2)
Objest.assign
const a = Object.assign({}, o1, o2)
object spread
const a = { ...o1, ...o2 }