Benchmark: lodash cloneDeep vs. structuredClone vs. recursiveDeepCopy

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/jsondiffpatch@0.4.1/dist/jsondiffpatch.umd.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/rfdc@1.3.0'></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 rfdcClone = rfdc();

///////////////////////////////////////////////////////////////////
function recursiveDeepCopy(value) {
  if (value instanceof Date) {
    return new Date(value);
  }
  if (value instanceof RegExp) {
    return new RegExp(value);
  }
  if (value instanceof Map) {
    return new Map(value);
  }
  if (value instanceof Set) {
    return new Set(value);
  }
  if (typeof value !== 'object') {
    return value;
  }
  if (!value) {
    return value;
  }
  let newObject;
  if ('[object Array]' === Object.prototype.toString.apply(value)) {
    newObject = [];
    for (let i = 0; i < value.length; i += 1) {
      newObject[i] = recursiveDeepCopy(value[i]);
    }
    return newObject;
  }

  newObject = {};
  for (let i in value) {
    if (value.hasOwnProperty(i)) {
      newObject[i] = recursiveDeepCopy(value[i]);
    }
  }
  return newObject;
}

Tests:

lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
JSON.parse(JSON.stringify())
myCopy = JSON.parse(JSON.stringify(MyObject));
recursiveDeepCopy
myCopy = recursiveDeepCopy(MyObject);
structuredClone
myCopy = structuredClone(MyObject);
rfdc
myCopy = rfdcClone(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash cloneDeep
JSON.parse(JSON.stringify())
recursiveDeepCopy
structuredClone
rfdc

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser/OS: Chrome 133 on Linux

View result in a separate tab

Test name	Executions per second
lodash cloneDeep	1025617.1 Ops/sec
JSON.parse(JSON.stringify())	873243.7 Ops/sec
recursiveDeepCopy	3573713.8 Ops/sec
structuredClone	405902.2 Ops/sec
rfdc	4297615.0 Ops/sec

Related benchmarks:

lodash cloneDeep vs. structuredClone vs. recursiveDeepCopy (version: 1)

Comparing performance of: lodash cloneDeep vs JSON.parse(JSON.stringify()) vs recursiveDeepCopy vs structuredClone vs rfdc

Created: one year ago by: Guest

Jump to the latest result

lodash cloneDeep

JSON.parse(JSON.stringify())

recursiveDeepCopy

structuredClone

rfdc

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A