Run results for: Lodash cloneDeep vs JSON Clone vs Ramda Clone vs hand rolled vs spread vs obj.assign

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:120.0) Gecko/20100101 Firefox/120.0

Browser: Firefox 120

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

obj.assign

37.1M/s

spread

17.6M/s

hand rolled

2.6M/s

Ramda clone

1.6M/s

Lodash cloneDeep

1.5M/s

Json clone

697K/s

View exact numbers

Test name	Executions per second
✓ obj.assign	37,084,244 Ops/sec
spread	17,565,268 Ops/sec
hand rolled	2,610,422 Ops/sec
Ramda clone	1,616,841 Ops/sec
Lodash cloneDeep	1,488,916 Ops/sec
Json clone	696,752 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/clone/2.1.2/clone.min.js"></script>

Script Preparation code:

var MyObject = {
  description: 'Creates a deep copy of source, which should be an object or an array.',
  myNumber: 123456789,
  myBoolean: true,
  jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...'
  }
};

var myCopy = null;

Tests:

Lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
Json clone
myCopy = JSON.parse(JSON.stringify(MyObject));
Ramda clone
myCopy = R.clone(MyObject);
hand rolled
const cp=(obj)=>"object" === typeof obj ? Object.fromEntries(Object.entries(obj).map(([k,v])=>[k,cp(v)])) : obj myCopy = cp(MyObject)
spread
myCopy = {...MyObject}
obj.assign
myCopy = Object.assign({}, MyObject)