Benchmark: Lodash cloneDeep vs structuredClone vs JSON Parse vs JSON indirect parse vs in-house deepcopy

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:

Lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
Native structuredClone
myCopy = structuredClone(MyObject);
JSON Parse
myCopy = JSON.parse(JSON.stringify(MyObject));
Indirect JSON Parse
s = JSON.stringify(MyObject); myCopy = JSON.parse(s);
In-house deepcopy
myCopy = deepcopy(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
Native structuredClone
JSON Parse
Indirect JSON Parse
In-house deepcopy

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 8 days ago)

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/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	597783.7 Ops/sec
Native structuredClone	81082.8 Ops/sec
JSON Parse	1189525.0 Ops/sec
Indirect JSON Parse	1098014.0 Ops/sec
In-house deepcopy	1701147.0 Ops/sec

Lodash cloneDeep vs structuredClone vs JSON Parse vs JSON indirect parse vs in-house deepcopy (version: 0)

https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Comparing performance of: Lodash cloneDeep vs Native structuredClone vs JSON Parse vs Indirect JSON Parse vs In-house deepcopy

Created: one year ago by: Guest

Jump to the latest result

Lodash cloneDeep

Native structuredClone

JSON Parse

Indirect JSON Parse

In-house deepcopy

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A