Run results for: Lodash cloneDeep vs structuredClone vs JSON Parse vs JSON indirect parse vs in-house deepcopy

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

In-house deepcopy

1.7M/s

JSON Parse

1.2M/s

Indirect JSON Parse

1.1M/s

Lodash cloneDeep

598K/s

Native structuredClone

81K/s

View exact numbers

Test name	Executions per second
✓ In-house deepcopy	1,701,146 Ops/sec
JSON Parse	1,189,525 Ops/sec
Indirect JSON Parse	1,098,014 Ops/sec
Lodash cloneDeep	597,784 Ops/sec
Native structuredClone	81,083 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 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;
var s = '';
function deepcopy(o) {
    if (o instanceof Array) {
      return Array.from(o, deepcopy)
    }
    const c = Object.assign({}, o)
    for (const k of Object.keys(o)) {
      if (typeof o[k] === 'object' && o[k]) {
        c[k] = deepcopy(o[k])
      }
    }
    return c
  }

Tests: